diff options
28 files changed, 12909 insertions, 3746 deletions
diff --git a/src/cpptoml/LICENSE b/src/cpptoml/LICENSE deleted file mode 100644 index 8802c4fa5..000000000 --- a/src/cpptoml/LICENSE +++ /dev/null @@ -1,18 +0,0 @@ -Copyright (c) 2014 Chase Geigle - -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software is furnished to do so, -subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS -FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR -COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER -IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN -CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/src/cpptoml/cpptoml.h b/src/cpptoml/cpptoml.h deleted file mode 100644 index 5a00da3b4..000000000 --- a/src/cpptoml/cpptoml.h +++ /dev/null @@ -1,3668 +0,0 @@ -/** - * @file cpptoml.h - * @author Chase Geigle - * @date May 2013 - */ - -#ifndef CPPTOML_H -#define CPPTOML_H - -#include <algorithm> -#include <cassert> -#include <clocale> -#include <cstdint> -#include <cstring> -#include <fstream> -#include <iomanip> -#include <map> -#include <memory> -#include <sstream> -#include <stdexcept> -#include <string> -#include <unordered_map> -#include <vector> - -#if __cplusplus > 201103L -#define CPPTOML_DEPRECATED(reason) [[deprecated(reason)]] -#elif defined(__clang__) -#define CPPTOML_DEPRECATED(reason) __attribute__((deprecated(reason))) -#elif defined(__GNUG__) -#define CPPTOML_DEPRECATED(reason) __attribute__((deprecated)) -#elif defined(_MSC_VER) -#if _MSC_VER < 1910 -#define CPPTOML_DEPRECATED(reason) __declspec(deprecated) -#else -#define CPPTOML_DEPRECATED(reason) [[deprecated(reason)]] -#endif -#endif - -namespace cpptoml -{ -class writer; // forward declaration -class base; // forward declaration -#if defined(CPPTOML_USE_MAP) -// a std::map will ensure that entries a sorted, albeit at a slight -// performance penalty relative to the (default) unordered_map -using string_to_base_map = std::map<std::string, std::shared_ptr<base>>; -#else -// by default an unordered_map is used for best performance as the -// toml specification does not require entries to be sorted -using string_to_base_map - = std::unordered_map<std::string, std::shared_ptr<base>>; -#endif - -// if defined, `base` will retain type information in form of an enum class -// such that static_cast can be used instead of dynamic_cast -// #define CPPTOML_NO_RTTI - -template <class T> -class option -{ - public: - option() : empty_{true} - { - // nothing - } - - option(T value) : empty_{false}, value_(std::move(value)) - { - // nothing - } - - explicit operator bool() const - { - return !empty_; - } - - const T& operator*() const - { - return value_; - } - - const T* operator->() const - { - return &value_; - } - - template <class U> - T value_or(U&& alternative) const - { - if (!empty_) - return value_; - return static_cast<T>(std::forward<U>(alternative)); - } - - private: - bool empty_; - T value_; -}; - -struct local_date -{ - int year = 0; - int month = 0; - int day = 0; -}; - -struct local_time -{ - int hour = 0; - int minute = 0; - int second = 0; - int microsecond = 0; -}; - -struct zone_offset -{ - int hour_offset = 0; - int minute_offset = 0; -}; - -struct local_datetime : local_date, local_time -{ -}; - -struct offset_datetime : local_datetime, zone_offset -{ - static inline struct offset_datetime from_zoned(const struct tm& t) - { - offset_datetime dt; - dt.year = t.tm_year + 1900; - dt.month = t.tm_mon + 1; - dt.day = t.tm_mday; - dt.hour = t.tm_hour; - dt.minute = t.tm_min; - dt.second = t.tm_sec; - - char buf[16]; - strftime(buf, 16, "%z", &t); - - int offset = std::stoi(buf); - dt.hour_offset = offset / 100; - dt.minute_offset = offset % 100; - return dt; - } - - CPPTOML_DEPRECATED("from_local has been renamed to from_zoned") - static inline struct offset_datetime from_local(const struct tm& t) - { - return from_zoned(t); - } - - static inline struct offset_datetime from_utc(const struct tm& t) - { - offset_datetime dt; - dt.year = t.tm_year + 1900; - dt.month = t.tm_mon + 1; - dt.day = t.tm_mday; - dt.hour = t.tm_hour; - dt.minute = t.tm_min; - dt.second = t.tm_sec; - return dt; - } -}; - -CPPTOML_DEPRECATED("datetime has been renamed to offset_datetime") -typedef offset_datetime datetime; - -class fill_guard -{ - public: - fill_guard(std::ostream& os) : os_(os), fill_{os.fill()} - { - // nothing - } - - ~fill_guard() - { - os_.fill(fill_); - } - - private: - std::ostream& os_; - std::ostream::char_type fill_; -}; - -inline std::ostream& operator<<(std::ostream& os, const local_date& dt) -{ - fill_guard g{os}; - os.fill('0'); - - using std::setw; - os << setw(4) << dt.year << "-" << setw(2) << dt.month << "-" << setw(2) - << dt.day; - - return os; -} - -inline std::ostream& operator<<(std::ostream& os, const local_time& ltime) -{ - fill_guard g{os}; - os.fill('0'); - - using std::setw; - os << setw(2) << ltime.hour << ":" << setw(2) << ltime.minute << ":" - << setw(2) << ltime.second; - - if (ltime.microsecond > 0) - { - os << "."; - int power = 100000; - for (int curr_us = ltime.microsecond; curr_us; power /= 10) - { - auto num = curr_us / power; - os << num; - curr_us -= num * power; - } - } - - return os; -} - -inline std::ostream& operator<<(std::ostream& os, const zone_offset& zo) -{ - fill_guard g{os}; - os.fill('0'); - - using std::setw; - - if (zo.hour_offset != 0 || zo.minute_offset != 0) - { - if (zo.hour_offset > 0) - { - os << "+"; - } - else - { - os << "-"; - } - os << setw(2) << std::abs(zo.hour_offset) << ":" << setw(2) - << std::abs(zo.minute_offset); - } - else - { - os << "Z"; - } - - return os; -} - -inline std::ostream& operator<<(std::ostream& os, const local_datetime& dt) -{ - return os << static_cast<const local_date&>(dt) << "T" - << static_cast<const local_time&>(dt); -} - -inline std::ostream& operator<<(std::ostream& os, const offset_datetime& dt) -{ - return os << static_cast<const local_datetime&>(dt) - << static_cast<const zone_offset&>(dt); -} - -template <class T, class... Ts> -struct is_one_of; - -template <class T, class V> -struct is_one_of<T, V> : std::is_same<T, V> -{ -}; - -template <class T, class V, class... Ts> -struct is_one_of<T, V, Ts...> -{ - const static bool value - = std::is_same<T, V>::value || is_one_of<T, Ts...>::value; -}; - -template <class T> -class value; - -template <class T> -struct valid_value - : is_one_of<T, std::string, int64_t, double, bool, local_date, local_time, - local_datetime, offset_datetime> -{ -}; - -template <class T, class Enable = void> -struct value_traits; - -template <class T> -struct valid_value_or_string_convertible -{ - - const static bool value = valid_value<typename std::decay<T>::type>::value - || std::is_convertible<T, std::string>::value; -}; - -template <class T> -struct value_traits<T, typename std::enable_if< - valid_value_or_string_convertible<T>::value>::type> -{ - using value_type = typename std::conditional< - valid_value<typename std::decay<T>::type>::value, - typename std::decay<T>::type, std::string>::type; - - using type = value<value_type>; - - static value_type construct(T&& val) - { - return value_type(val); - } -}; - -template <class T> -struct value_traits< - T, - typename std::enable_if< - !valid_value_or_string_convertible<T>::value - && std::is_floating_point<typename std::decay<T>::type>::value>::type> -{ - using value_type = typename std::decay<T>::type; - - using type = value<double>; - - static value_type construct(T&& val) - { - return value_type(val); - } -}; - -template <class T> -struct value_traits< - T, typename std::enable_if< - !valid_value_or_string_convertible<T>::value - && !std::is_floating_point<typename std::decay<T>::type>::value - && std::is_signed<typename std::decay<T>::type>::value>::type> -{ - using value_type = int64_t; - - using type = value<int64_t>; - - static value_type construct(T&& val) - { - if (val < (std::numeric_limits<int64_t>::min)()) - throw std::underflow_error{"constructed value cannot be " - "represented by a 64-bit signed " - "integer"}; - - if (val > (std::numeric_limits<int64_t>::max)()) - throw std::overflow_error{"constructed value cannot be represented " - "by a 64-bit signed integer"}; - - return static_cast<int64_t>(val); - } -}; - -template <class T> -struct value_traits< - T, typename std::enable_if< - !valid_value_or_string_convertible<T>::value - && std::is_unsigned<typename std::decay<T>::type>::value>::type> -{ - using value_type = int64_t; - - using type = value<int64_t>; - - static value_type construct(T&& val) - { - if (val > static_cast<uint64_t>((std::numeric_limits<int64_t>::max)())) - throw std::overflow_error{"constructed value cannot be represented " - "by a 64-bit signed integer"}; - - return static_cast<int64_t>(val); - } -}; - -class array; -class table; -class table_array; - -template <class T> -struct array_of_trait -{ - using return_type = option<std::vector<T>>; -}; - -template <> -struct array_of_trait<array> -{ - using return_type = option<std::vector<std::shared_ptr<array>>>; -}; - -template <class T> -inline std::shared_ptr<typename value_traits<T>::type> make_value(T&& val); -inline std::shared_ptr<array> make_array(); - -namespace detail -{ -template <class T> -inline std::shared_ptr<T> make_element(); -} - -inline std::shared_ptr<table> make_table(); -inline std::shared_ptr<table_array> make_table_array(bool is_inline = false); - -#if defined(CPPTOML_NO_RTTI) -/// Base type used to store underlying data type explicitly if RTTI is disabled -enum class base_type -{ - NONE, - STRING, - LOCAL_TIME, - LOCAL_DATE, - LOCAL_DATETIME, - OFFSET_DATETIME, - INT, - FLOAT, - BOOL, - TABLE, - ARRAY, - TABLE_ARRAY -}; - -/// Type traits class to convert C++ types to enum member -template <class T> -struct base_type_traits; - -template <> -struct base_type_traits<std::string> -{ - static const base_type type = base_type::STRING; -}; - -template <> -struct base_type_traits<local_time> -{ - static const base_type type = base_type::LOCAL_TIME; -}; - -template <> -struct base_type_traits<local_date> -{ - static const base_type type = base_type::LOCAL_DATE; -}; - -template <> -struct base_type_traits<local_datetime> -{ - static const base_type type = base_type::LOCAL_DATETIME; -}; - -template <> -struct base_type_traits<offset_datetime> -{ - static const base_type type = base_type::OFFSET_DATETIME; -}; - -template <> -struct base_type_traits<int64_t> -{ - static const base_type type = base_type::INT; -}; - -template <> -struct base_type_traits<double> -{ - static const base_type type = base_type::FLOAT; -}; - -template <> -struct base_type_traits<bool> -{ - static const base_type type = base_type::BOOL; -}; - -template <> -struct base_type_traits<table> -{ - static const base_type type = base_type::TABLE; -}; - -template <> -struct base_type_traits<array> -{ - static const base_type type = base_type::ARRAY; -}; - -template <> -struct base_type_traits<table_array> -{ - static const base_type type = base_type::TABLE_ARRAY; -}; -#endif - -/** - * A generic base TOML value used for type erasure. - */ -class base : public std::enable_shared_from_this<base> -{ - public: - virtual ~base() = default; - - virtual std::shared_ptr<base> clone() const = 0; - - /** - * Determines if the given TOML element is a value. - */ - virtual bool is_value() const - { - return false; - } - - /** - * Determines if the given TOML element is a table. - */ - virtual bool is_table() const - { - return false; - } - - /** - * Converts the TOML element into a table. - */ - std::shared_ptr<table> as_table() - { - if (is_table()) - return std::static_pointer_cast<table>(shared_from_this()); - return nullptr; - } - /** - * Determines if the TOML element is an array of "leaf" elements. - */ - virtual bool is_array() const - { - return false; - } - - /** - * Converts the TOML element to an array. - */ - std::shared_ptr<array> as_array() - { - if (is_array()) - return std::static_pointer_cast<array>(shared_from_this()); - return nullptr; - } - - /** - * Determines if the given TOML element is an array of tables. - */ - virtual bool is_table_array() const - { - return false; - } - - /** - * Converts the TOML element into a table array. - */ - std::shared_ptr<table_array> as_table_array() - { - if (is_table_array()) - return std::static_pointer_cast<table_array>(shared_from_this()); - return nullptr; - } - - /** - * Attempts to coerce the TOML element into a concrete TOML value - * of type T. - */ - template <class T> - std::shared_ptr<value<T>> as(); - - template <class T> - std::shared_ptr<const value<T>> as() const; - - template <class Visitor, class... Args> - void accept(Visitor&& visitor, Args&&... args) const; - -#if defined(CPPTOML_NO_RTTI) - base_type type() const - { - return type_; - } - - protected: - base(const base_type t) : type_(t) - { - // nothing - } - - private: - const base_type type_ = base_type::NONE; - -#else - protected: - base() - { - // nothing - } -#endif -}; - -/** - * A concrete TOML value representing the "leaves" of the "tree". - */ -template <class T> -class value : public base -{ - struct make_shared_enabler - { - // nothing; this is a private key accessible only to friends - }; - - template <class U> - friend std::shared_ptr<typename value_traits<U>::type> - cpptoml::make_value(U&& val); - - public: - static_assert(valid_value<T>::value, "invalid value type"); - - std::shared_ptr<base> clone() const override; - - value(const make_shared_enabler&, const T& val) : value(val) - { - // nothing; note that users cannot actually invoke this function - // because they lack access to the make_shared_enabler. - } - - bool is_value() const override - { - return true; - } - - /** - * Gets the data associated with this value. - */ - T& get() - { - return data_; - } - - /** - * Gets the data associated with this value. Const version. - */ - const T& get() const - { - return data_; - } - - private: - T data_; - - /** - * Constructs a value from the given data. - */ -#if defined(CPPTOML_NO_RTTI) - value(const T& val) : base(base_type_traits<T>::type), data_(val) - { - } -#else - value(const T& val) : data_(val) - { - } -#endif - - value(const value& val) = delete; - value& operator=(const value& val) = delete; -}; - -template <class T> -std::shared_ptr<typename value_traits<T>::type> make_value(T&& val) -{ - using value_type = typename value_traits<T>::type; - using enabler = typename value_type::make_shared_enabler; - return std::make_shared<value_type>( - enabler{}, value_traits<T>::construct(std::forward<T>(val))); -} - -template <class T> -inline std::shared_ptr<value<T>> base::as() -{ -#if defined(CPPTOML_NO_RTTI) - if (type() == base_type_traits<T>::type) - return std::static_pointer_cast<value<T>>(shared_from_this()); - else - return nullptr; -#else - return std::dynamic_pointer_cast<value<T>>(shared_from_this()); -#endif -} - -// special case value<double> to allow getting an integer parameter as a -// double value -template <> -inline std::shared_ptr<value<double>> base::as() -{ -#if defined(CPPTOML_NO_RTTI) - if (type() == base_type::FLOAT) - return std::static_pointer_cast<value<double>>(shared_from_this()); - - if (type() == base_type::INT) - { - auto v = std::static_pointer_cast<value<int64_t>>(shared_from_this()); - return make_value<double>(static_cast<double>(v->get())); - } -#else - if (auto v = std::dynamic_pointer_cast<value<double>>(shared_from_this())) - return v; - - if (auto v = std::dynamic_pointer_cast<value<int64_t>>(shared_from_this())) - return make_value<double>(static_cast<double>(v->get())); -#endif - - return nullptr; -} - -template <class T> -inline std::shared_ptr<const value<T>> base::as() const -{ -#if defined(CPPTOML_NO_RTTI) - if (type() == base_type_traits<T>::type) - return std::static_pointer_cast<const value<T>>(shared_from_this()); - else - return nullptr; -#else - return std::dynamic_pointer_cast<const value<T>>(shared_from_this()); -#endif -} - -// special case value<double> to allow getting an integer parameter as a -// double value -template <> -inline std::shared_ptr<const value<double>> base::as() const -{ -#if defined(CPPTOML_NO_RTTI) - if (type() == base_type::FLOAT) - return std::static_pointer_cast<const value<double>>( - shared_from_this()); - - if (type() == base_type::INT) - { - auto v = as<int64_t>(); - // the below has to be a non-const value<double> due to a bug in - // libc++: https://llvm.org/bugs/show_bug.cgi?id=18843 - return make_value<double>(static_cast<double>(v->get())); - } -#else - if (auto v - = std::dynamic_pointer_cast<const value<double>>(shared_from_this())) - return v; - - if (auto v = as<int64_t>()) - { - // the below has to be a non-const value<double> due to a bug in - // libc++: https://llvm.org/bugs/show_bug.cgi?id=18843 - return make_value<double>(static_cast<double>(v->get())); - } -#endif - - return nullptr; -} - -/** - * Exception class for array insertion errors. - */ -class array_exception : public std::runtime_error -{ - public: - array_exception(const std::string& err) : std::runtime_error{err} - { - } -}; - -class array : public base -{ - public: - friend std::shared_ptr<array> make_array(); - - std::shared_ptr<base> clone() const override; - - virtual bool is_array() const override - { - return true; - } - - using size_type = std::size_t; - - /** - * arrays can be iterated over - */ - using iterator = std::vector<std::shared_ptr<base>>::iterator; - - /** - * arrays can be iterated over. Const version. - */ - using const_iterator = std::vector<std::shared_ptr<base>>::const_iterator; - - iterator begin() - { - return values_.begin(); - } - - const_iterator begin() const - { - return values_.begin(); - } - - iterator end() - { - return values_.end(); - } - - const_iterator end() const - { - return values_.end(); - } - - /** - * Obtains the array (vector) of base values. - */ - std::vector<std::shared_ptr<base>>& get() - { - return values_; - } - - /** - * Obtains the array (vector) of base values. Const version. - */ - const std::vector<std::shared_ptr<base>>& get() const - { - return values_; - } - - std::shared_ptr<base> at(size_t idx) const - { - return values_.at(idx); - } - - /** - * Obtains an array of value<T>s. Note that elements may be - * nullptr if they cannot be converted to a value<T>. - */ - template <class T> - std::vector<std::shared_ptr<value<T>>> array_of() const - { - std::vector<std::shared_ptr<value<T>>> result(values_.size()); - - std::transform(values_.begin(), values_.end(), result.begin(), - [&](std::shared_ptr<base> v) { return v->as<T>(); }); - - return result; - } - - /** - * Obtains a option<vector<T>>. The option will be empty if the array - * contains values that are not of type T. - */ - template <class T> - inline typename array_of_trait<T>::return_type get_array_of() const - { - std::vector<T> result; - result.reserve(values_.size()); - - for (const auto& val : values_) - { - if (auto v = val->as<T>()) - result.push_back(v->get()); - else - return {}; - } - - return {std::move(result)}; - } - - /** - * Obtains an array of arrays. Note that elements may be nullptr - * if they cannot be converted to a array. - */ - std::vector<std::shared_ptr<array>> nested_array() const - { - std::vector<std::shared_ptr<array>> result(values_.size()); - - std::transform(values_.begin(), values_.end(), result.begin(), - [&](std::shared_ptr<base> v) -> std::shared_ptr<array> { - if (v->is_array()) - return std::static_pointer_cast<array>(v); - return std::shared_ptr<array>{}; - }); - - return result; - } - - /** - * Add a value to the end of the array - */ - template <class T> - void push_back(const std::shared_ptr<value<T>>& val) - { - if (values_.empty() || values_[0]->as<T>()) - { - values_.push_back(val); - } - else - { - throw array_exception{"Arrays must be homogenous."}; - } - } - - /** - * Add an array to the end of the array - */ - void push_back(const std::shared_ptr<array>& val) - { - if (values_.empty() || values_[0]->is_array()) - { - values_.push_back(val); - } - else - { - throw array_exception{"Arrays must be homogenous."}; - } - } - - /** - * Convenience function for adding a simple element to the end - * of the array. - */ - template <class T> - void push_back(T&& val, typename value_traits<T>::type* = 0) - { - push_back(make_value(std::forward<T>(val))); - } - - /** - * Insert a value into the array - */ - template <class T> - iterator insert(iterator position, const std::shared_ptr<value<T>>& value) - { - if (values_.empty() || values_[0]->as<T>()) - { - return values_.insert(position, value); - } - else - { - throw array_exception{"Arrays must be homogenous."}; - } - } - - /** - * Insert an array into the array - */ - iterator insert(iterator position, const std::shared_ptr<array>& value) - { - if (values_.empty() || values_[0]->is_array()) - { - return values_.insert(position, value); - } - else - { - throw array_exception{"Arrays must be homogenous."}; - } - } - - /** - * Convenience function for inserting a simple element in the array - */ - template <class T> - iterator insert(iterator position, T&& val, - typename value_traits<T>::type* = 0) - { - return insert(position, make_value(std::forward<T>(val))); - } - - /** - * Erase an element from the array - */ - iterator erase(iterator position) - { - return values_.erase(position); - } - - /** - * Clear the array - */ - void clear() - { - values_.clear(); - } - - /** - * Reserve space for n values. - */ - void reserve(size_type n) - { - values_.reserve(n); - } - - private: -#if defined(CPPTOML_NO_RTTI) - array() : base(base_type::ARRAY) - { - // empty - } -#else - array() = default; -#endif - - template <class InputIterator> - array(InputIterator begin, InputIterator end) : values_{begin, end} - { - // nothing - } - - array(const array& obj) = delete; - array& operator=(const array& obj) = delete; - - std::vector<std::shared_ptr<base>> values_; -}; - -inline std::shared_ptr<array> make_array() -{ - struct make_shared_enabler : public array - { - make_shared_enabler() - { - // nothing - } - }; - - return std::make_shared<make_shared_enabler>(); -} - -namespace detail -{ -template <> -inline std::shared_ptr<array> make_element<array>() -{ - return make_array(); -} -} // namespace detail - -/** - * Obtains a option<vector<T>>. The option will be empty if the array - * contains values that are not of type T. - */ -template <> -inline typename array_of_trait<array>::return_type -array::get_array_of<array>() const -{ - std::vector<std::shared_ptr<array>> result; - result.reserve(values_.size()); - - for (const auto& val : values_) - { - if (auto v = val->as_array()) - result.push_back(v); - else - return {}; - } - - return {std::move(result)}; -} - -class table; - -class table_array : public base -{ - friend class table; - friend std::shared_ptr<table_array> make_table_array(bool); - - public: - std::shared_ptr<base> clone() const override; - - using size_type = std::size_t; - - /** - * arrays can be iterated over - */ - using iterator = std::vector<std::shared_ptr<table>>::iterator; - - /** - * arrays can be iterated over. Const version. - */ - using const_iterator = std::vector<std::shared_ptr<table>>::const_iterator; - - iterator begin() - { - return array_.begin(); - } - - const_iterator begin() const - { - return array_.begin(); - } - - iterator end() - { - return array_.end(); - } - - const_iterator end() const - { - return array_.end(); - } - - virtual bool is_table_array() const override - { - return true; - } - - std::vector<std::shared_ptr<table>>& get() - { - return array_; - } - - const std::vector<std::shared_ptr<table>>& get() const - { - return array_; - } - - /** - * Add a table to the end of the array - */ - void push_back(const std::shared_ptr<table>& val) - { - array_.push_back(val); - } - - /** - * Insert a table into the array - */ - iterator insert(iterator position, const std::shared_ptr<table>& value) - { - return array_.insert(position, value); - } - - /** - * Erase an element from the array - */ - iterator erase(iterator position) - { - return array_.erase(position); - } - - /** - * Clear the array - */ - void clear() - { - array_.clear(); - } - - /** - * Reserve space for n tables. - */ - void reserve(size_type n) - { - array_.reserve(n); - } - - /** - * Whether or not the table array is declared inline. This mostly - * matters for parsing, where statically defined arrays cannot be - * appended to using the array-of-table syntax. - */ - bool is_inline() const - { - return is_inline_; - } - - private: -#if defined(CPPTOML_NO_RTTI) - table_array(bool is_inline = false) - : base(base_type::TABLE_ARRAY), is_inline_(is_inline) - { - // nothing - } -#else - table_array(bool is_inline = false) : is_inline_(is_inline) - { - // nothing - } -#endif - - table_array(const table_array& obj) = delete; - table_array& operator=(const table_array& rhs) = delete; - - std::vector<std::shared_ptr<table>> array_; - const bool is_inline_ = false; -}; - -inline std::shared_ptr<table_array> make_table_array(bool is_inline) -{ - struct make_shared_enabler : public table_array - { - make_shared_enabler(bool mse_is_inline) : table_array(mse_is_inline) - { - // nothing - } - }; - - return std::make_shared<make_shared_enabler>(is_inline); -} - -namespace detail -{ -template <> -inline std::shared_ptr<table_array> make_element<table_array>() -{ - return make_table_array(true); -} -} // namespace detail - -// The below are overloads for fetching specific value types out of a value -// where special casting behavior (like bounds checking) is desired - -template <class T> -typename std::enable_if<!std::is_floating_point<T>::value - && std::is_signed<T>::value, - option<T>>::type -get_impl(const std::shared_ptr<base>& elem) -{ - if (auto v = elem->as<int64_t>()) - { - if (v->get() < (std::numeric_limits<T>::min)()) - throw std::underflow_error{ - "T cannot represent the value requested in get"}; - - if (v->get() > (std::numeric_limits<T>::max)()) - throw std::overflow_error{ - "T cannot represent the value requested in get"}; - - return {static_cast<T>(v->get())}; - } - else - { - return {}; - } -} - -template <class T> -typename std::enable_if<!std::is_same<T, bool>::value - && std::is_unsigned<T>::value, - option<T>>::type -get_impl(const std::shared_ptr<base>& elem) -{ - if (auto v = elem->as<int64_t>()) - { - if (v->get() < 0) - throw std::underflow_error{"T cannot store negative value in get"}; - - if (static_cast<uint64_t>(v->get()) > (std::numeric_limits<T>::max)()) - throw std::overflow_error{ - "T cannot represent the value requested in get"}; - - return {static_cast<T>(v->get())}; - } - else - { - return {}; - } -} - -template <class T> -typename std::enable_if<!std::is_integral<T>::value - || std::is_same<T, bool>::value, - option<T>>::type -get_impl(const std::shared_ptr<base>& elem) -{ - if (auto v = elem->as<T>()) - { - return {v->get()}; - } - else - { - return {}; - } -} - -/** - * Represents a TOML keytable. - */ -class table : public base -{ - public: - friend class table_array; - friend std::shared_ptr<table> make_table(); - - std::shared_ptr<base> clone() const override; - - /** - * tables can be iterated over. - */ - using iterator = string_to_base_map::iterator; - - /** - * tables can be iterated over. Const version. - */ - using const_iterator = string_to_base_map::const_iterator; - - iterator begin() - { - return map_.begin(); - } - - const_iterator begin() const - { - return map_.begin(); - } - - iterator end() - { - return map_.end(); - } - - const_iterator end() const - { - return map_.end(); - } - - bool is_table() const override - { - return true; - } - - bool empty() const - { - return map_.empty(); - } - - /** - * Determines if this key table contains the given key. - */ - bool contains(const std::string& key) const - { - return map_.find(key) != map_.end(); - } - - /** - * Determines if this key table contains the given key. Will - * resolve "qualified keys". Qualified keys are the full access - * path separated with dots like "grandparent.parent.child". - */ - bool contains_qualified(const std::string& key) const - { - return resolve_qualified(key); - } - - /** - * Obtains the base for a given key. - * @throw std::out_of_range if the key does not exist - */ - std::shared_ptr<base> get(const std::string& key) const - { - return map_.at(key); - } - - /** - * Obtains the base for a given key. Will resolve "qualified - * keys". Qualified keys are the full access path separated with - * dots like "grandparent.parent.child". - * - * @throw std::out_of_range if the key does not exist - */ - std::shared_ptr<base> get_qualified(const std::string& key) const - { - std::shared_ptr<base> p; - resolve_qualified(key, &p); - return p; - } - - /** - * Obtains a table for a given key, if possible. - */ - std::shared_ptr<table> get_table(const std::string& key) const - { - if (contains(key) && get(key)->is_table()) - return std::static_pointer_cast<table>(get(key)); - return nullptr; - } - - /** - * Obtains a table for a given key, if possible. Will resolve - * "qualified keys". - */ - std::shared_ptr<table> get_table_qualified(const std::string& key) const - { - if (contains_qualified(key) && get_qualified(key)->is_table()) - return std::static_pointer_cast<table>(get_qualified(key)); - return nullptr; - } - - /** - * Obtains an array for a given key. - */ - std::shared_ptr<array> get_array(const std::string& key) const - { - if (!contains(key)) - return nullptr; - return get(key)->as_array(); - } - - /** - * Obtains an array for a given key. Will resolve "qualified keys". - */ - std::shared_ptr<array> get_array_qualified(const std::string& key) const - { - if (!contains_qualified(key)) - return nullptr; - return get_qualified(key)->as_array(); - } - - /** - * Obtains a table_array for a given key, if possible. - */ - std::shared_ptr<table_array> get_table_array(const std::string& key) const - { - if (!contains(key)) - return nullptr; - return get(key)->as_table_array(); - } - - /** - * Obtains a table_array for a given key, if possible. Will resolve - * "qualified keys". - */ - std::shared_ptr<table_array> - get_table_array_qualified(const std::string& key) const - { - if (!contains_qualified(key)) - return nullptr; - return get_qualified(key)->as_table_array(); - } - - /** - * Helper function that attempts to get a value corresponding - * to the template parameter from a given key. - */ - template <class T> - option<T> get_as(const std::string& key) const - { - try - { - return get_impl<T>(get(key)); - } - catch (const std::out_of_range&) - { - return {}; - } - } - - /** - * Helper function that attempts to get a value corresponding - * to the template parameter from a given key. Will resolve "qualified - * keys". - */ - template <class T> - option<T> get_qualified_as(const std::string& key) const - { - try - { - return get_impl<T>(get_qualified(key)); - } - catch (const std::out_of_range&) - { - return {}; - } - } - - /** - * Helper function that attempts to get an array of values of a given - * type corresponding to the template parameter for a given key. - * - * If the key doesn't exist, doesn't exist as an array type, or one or - * more keys inside the array type are not of type T, an empty option - * is returned. Otherwise, an option containing a vector of the values - * is returned. - */ - template <class T> - inline typename array_of_trait<T>::return_type - get_array_of(const std::string& key) const - { - if (auto v = get_array(key)) - { - std::vector<T> result; - result.reserve(v->get().size()); - - for (const auto& b : v->get()) - { - if (auto val = b->as<T>()) - result.push_back(val->get()); - else - return {}; - } - return {std::move(result)}; - } - - return {}; - } - - /** - * Helper function that attempts to get an array of values of a given - * type corresponding to the template parameter for a given key. Will - * resolve "qualified keys". - * - * If the key doesn't exist, doesn't exist as an array type, or one or - * more keys inside the array type are not of type T, an empty option - * is returned. Otherwise, an option containing a vector of the values - * is returned. - */ - template <class T> - inline typename array_of_trait<T>::return_type - get_qualified_array_of(const std::string& key) const - { - if (auto v = get_array_qualified(key)) - { - std::vector<T> result; - result.reserve(v->get().size()); - - for (const auto& b : v->get()) - { - if (auto val = b->as<T>()) - result.push_back(val->get()); - else - return {}; - } - return {std::move(result)}; - } - - return {}; - } - - /** - * Adds an element to the keytable. - */ - void insert(const std::string& key, const std::shared_ptr<base>& value) - { - map_[key] = value; - } - - /** - * Convenience shorthand for adding a simple element to the - * keytable. - */ - template <class T> - void insert(const std::string& key, T&& val, - typename value_traits<T>::type* = 0) - { - insert(key, make_value(std::forward<T>(val))); - } - - /** - * Removes an element from the table. - */ - void erase(const std::string& key) - { - map_.erase(key); - } - - private: -#if defined(CPPTOML_NO_RTTI) - table() : base(base_type::TABLE) - { - // nothing - } -#else - table() - { - // nothing - } -#endif - - table(const table& obj) = delete; - table& operator=(const table& rhs) = delete; - - std::vector<std::string> split(const std::string& value, - char separator) const - { - std::vector<std::string> result; - std::string::size_type p = 0; - std::string::size_type q; - while ((q = value.find(separator, p)) != std::string::npos) - { - result.emplace_back(value, p, q - p); - p = q + 1; - } - result.emplace_back(value, p); - return result; - } - - // If output parameter p is specified, fill it with the pointer to the - // specified entry and throw std::out_of_range if it couldn't be found. - // - // Otherwise, just return true if the entry could be found or false - // otherwise and do not throw. - bool resolve_qualified(const std::string& key, - std::shared_ptr<base>* p = nullptr) const - { - auto parts = split(key, '.'); - auto last_key = parts.back(); - parts.pop_back(); - - auto cur_table = this; - for (const auto& part : parts) - { - cur_table = cur_table->get_table(part).get(); - if (!cur_table) - { - if (!p) - return false; - - throw std::out_of_range{key + " is not a valid key"}; - } - } - - if (!p) - return cur_table->map_.count(last_key) != 0; - - *p = cur_table->map_.at(last_key); - return true; - } - - string_to_base_map map_; -}; - -/** - * Helper function that attempts to get an array of arrays for a given - * key. - * - * If the key doesn't exist, doesn't exist as an array type, or one or - * more keys inside the array type are not of type T, an empty option - * is returned. Otherwise, an option containing a vector of the values - * is returned. - */ -template <> -inline typename array_of_trait<array>::return_type -table::get_array_of<array>(const std::string& key) const -{ - if (auto v = get_array(key)) - { - std::vector<std::shared_ptr<array>> result; - result.reserve(v->get().size()); - - for (const auto& b : v->get()) - { - if (auto val = b->as_array()) - result.push_back(val); - else - return {}; - } - - return {std::move(result)}; - } - - return {}; -} - -/** - * Helper function that attempts to get an array of arrays for a given - * key. Will resolve "qualified keys". - * - * If the key doesn't exist, doesn't exist as an array type, or one or - * more keys inside the array type are not of type T, an empty option - * is returned. Otherwise, an option containing a vector of the values - * is returned. - */ -template <> -inline typename array_of_trait<array>::return_type -table::get_qualified_array_of<array>(const std::string& key) const -{ - if (auto v = get_array_qualified(key)) - { - std::vector<std::shared_ptr<array>> result; - result.reserve(v->get().size()); - - for (const auto& b : v->get()) - { - if (auto val = b->as_array()) - result.push_back(val); - else - return {}; - } - - return {std::move(result)}; - } - - return {}; -} - -std::shared_ptr<table> make_table() -{ - struct make_shared_enabler : public table - { - make_shared_enabler() - { - // nothing - } - }; - - return std::make_shared<make_shared_enabler>(); -} - -namespace detail -{ -template <> -inline std::shared_ptr<table> make_element<table>() -{ - return make_table(); -} -} // namespace detail - -template <class T> -std::shared_ptr<base> value<T>::clone() const -{ - return make_value(data_); -} - -inline std::shared_ptr<base> array::clone() const -{ - auto result = make_array(); - result->reserve(values_.size()); - for (const auto& ptr : values_) - result->values_.push_back(ptr->clone()); - return result; -} - -inline std::shared_ptr<base> table_array::clone() const -{ - auto result = make_table_array(is_inline()); - result->reserve(array_.size()); - for (const auto& ptr : array_) - result->array_.push_back(ptr->clone()->as_table()); - return result; -} - -inline std::shared_ptr<base> table::clone() const -{ - auto result = make_table(); - for (const auto& pr : map_) - result->insert(pr.first, pr.second->clone()); - return result; -} - -/** - * Exception class for all TOML parsing errors. - */ -class parse_exception : public std::runtime_error -{ - public: - parse_exception(const std::string& err) : std::runtime_error{err} - { - } - - parse_exception(const std::string& err, std::size_t line_number) - : std::runtime_error{err + " at line " + std::to_string(line_number)} - { - } -}; - -inline bool is_number(char c) -{ - return c >= '0' && c <= '9'; -} - -inline bool is_hex(char c) -{ - return is_number(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'); -} - -/** - * Helper object for consuming expected characters. - */ -template <class OnError> -class consumer -{ - public: - consumer(std::string::iterator& it, const std::string::iterator& end, - OnError&& on_error) - : it_(it), end_(end), on_error_(std::forward<OnError>(on_error)) - { - // nothing - } - - void operator()(char c) - { - if (it_ == end_ || *it_ != c) - on_error_(); - ++it_; - } - - template <std::size_t N> - void operator()(const char (&str)[N]) - { - std::for_each(std::begin(str), std::end(str) - 1, - [&](char c) { (*this)(c); }); - } - - void eat_or(char a, char b) - { - if (it_ == end_ || (*it_ != a && *it_ != b)) - on_error_(); - ++it_; - } - - int eat_digits(int len) - { - int val = 0; - for (int i = 0; i < len; ++i) - { - if (!is_number(*it_) || it_ == end_) - on_error_(); - val = 10 * val + (*it_++ - '0'); - } - return val; - } - - void error() - { - on_error_(); - } - - private: - std::string::iterator& it_; - const std::string::iterator& end_; - OnError on_error_; -}; - -template <class OnError> -consumer<OnError> make_consumer(std::string::iterator& it, - const std::string::iterator& end, - OnError&& on_error) -{ - return consumer<OnError>(it, end, std::forward<OnError>(on_error)); -} - -// replacement for std::getline to handle incorrectly line-ended files -// https://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf -namespace detail -{ -inline std::istream& getline(std::istream& input, std::string& line) -{ - line.clear(); - - std::istream::sentry sentry{input, true}; - auto sb = input.rdbuf(); - - while (true) - { - auto c = sb->sbumpc(); - if (c == '\r') - { - if (sb->sgetc() == '\n') - c = sb->sbumpc(); - } - - if (c == '\n') - return input; - - if (c == std::istream::traits_type::eof()) - { - if (line.empty()) - input.setstate(std::ios::eofbit); - return input; - } - - line.push_back(static_cast<char>(c)); - } -} -} // namespace detail - -/** - * The parser class. - */ -class parser -{ - public: - /** - * Parsers are constructed from streams. - */ - parser(std::istream& stream) : input_(stream) - { - // nothing - } - - parser& operator=(const parser& parser) = delete; - - /** - * Parses the stream this parser was created on until EOF. - * @throw parse_exception if there are errors in parsing - */ - std::shared_ptr<table> parse() - { - std::shared_ptr<table> root = make_table(); - - table* curr_table = root.get(); - - while (detail::getline(input_, line_)) - { - line_number_++; - auto it = line_.begin(); - auto end = line_.end(); - consume_whitespace(it, end); - if (it == end || *it == '#') - continue; - if (*it == '[') - { - curr_table = root.get(); - parse_table(it, end, curr_table); - } - else - { - parse_key_value(it, end, curr_table); - consume_whitespace(it, end); - eol_or_comment(it, end); - } - } - return root; - } - - private: -#if defined _MSC_VER - __declspec(noreturn) -#elif defined __GNUC__ - __attribute__((noreturn)) -#endif - void throw_parse_exception(const std::string& err) - { - throw parse_exception{err, line_number_}; - } - - void parse_table(std::string::iterator& it, - const std::string::iterator& end, table*& curr_table) - { - // remove the beginning keytable marker - ++it; - if (it == end) - throw_parse_exception("Unexpected end of table"); - if (*it == '[') - parse_table_array(it, end, curr_table); - else - parse_single_table(it, end, curr_table); - } - - void parse_single_table(std::string::iterator& it, - const std::string::iterator& end, - table*& curr_table) - { - if (it == end || *it == ']') - throw_parse_exception("Table name cannot be empty"); - - std::string full_table_name; - bool inserted = false; - - auto key_end = [](char c) { return c == ']'; }; - - auto key_part_handler = [&](const std::string& part) { - if (part.empty()) - throw_parse_exception("Empty component of table name"); - - if (!full_table_name.empty()) - full_table_name += '.'; - full_table_name += part; - - if (curr_table->contains(part)) - { -#if !defined(__PGI) - auto b = curr_table->get(part); -#else - // Workaround for PGI compiler - std::shared_ptr<base> b = curr_table->get(part); -#endif - if (b->is_table()) - curr_table = static_cast<table*>(b.get()); - else if (b->is_table_array()) - curr_table = std::static_pointer_cast<table_array>(b) - ->get() - .back() - .get(); - else - throw_parse_exception("Key " + full_table_name - + "already exists as a value"); - } - else - { - inserted = true; - curr_table->insert(part, make_table()); - curr_table = static_cast<table*>(curr_table->get(part).get()); - } - }; - - key_part_handler(parse_key(it, end, key_end, key_part_handler)); - - if (it == end) - throw_parse_exception( - "Unterminated table declaration; did you forget a ']'?"); - - if (*it != ']') - { - std::string errmsg{"Unexpected character in table definition: "}; - errmsg += '"'; - errmsg += *it; - errmsg += '"'; - throw_parse_exception(errmsg); - } - - // table already existed - if (!inserted) - { - auto is_value - = [](const std::pair<const std::string&, - const std::shared_ptr<base>&>& p) { - return p.second->is_value(); - }; - - // if there are any values, we can't add values to this table - // since it has already been defined. If there aren't any - // values, then it was implicitly created by something like - // [a.b] - if (curr_table->empty() - || std::any_of(curr_table->begin(), curr_table->end(), - is_value)) - { - throw_parse_exception("Redefinition of table " - + full_table_name); - } - } - - ++it; - consume_whitespace(it, end); - eol_or_comment(it, end); - } - - void parse_table_array(std::string::iterator& it, - const std::string::iterator& end, table*& curr_table) - { - ++it; - if (it == end || *it == ']') - throw_parse_exception("Table array name cannot be empty"); - - auto key_end = [](char c) { return c == ']'; }; - - std::string full_ta_name; - auto key_part_handler = [&](const std::string& part) { - if (part.empty()) - throw_parse_exception("Empty component of table array name"); - - if (!full_ta_name.empty()) - full_ta_name += '.'; - full_ta_name += part; - - if (curr_table->contains(part)) - { -#if !defined(__PGI) - auto b = curr_table->get(part); -#else - // Workaround for PGI compiler - std::shared_ptr<base> b = curr_table->get(part); -#endif - - // if this is the end of the table array name, add an - // element to the table array that we just looked up, - // provided it was not declared inline - if (it != end && *it == ']') - { - if (!b->is_table_array()) - { - throw_parse_exception("Key " + full_ta_name - + " is not a table array"); - } - - auto v = b->as_table_array(); - - if (v->is_inline()) - { - throw_parse_exception("Static array " + full_ta_name - + " cannot be appended to"); - } - - v->get().push_back(make_table()); - curr_table = v->get().back().get(); - } - // otherwise, just keep traversing down the key name - else - { - if (b->is_table()) - curr_table = static_cast<table*>(b.get()); - else if (b->is_table_array()) - curr_table = std::static_pointer_cast<table_array>(b) - ->get() - .back() - .get(); - else - throw_parse_exception("Key " + full_ta_name - + " already exists as a value"); - } - } - else - { - // if this is the end of the table array name, add a new - // table array and a new table inside that array for us to - // add keys to next - if (it != end && *it == ']') - { - curr_table->insert(part, make_table_array()); - auto arr = std::static_pointer_cast<table_array>( - curr_table->get(part)); - arr->get().push_back(make_table()); - curr_table = arr->get().back().get(); - } - // otherwise, create the implicitly defined table and move - // down to it - else - { - curr_table->insert(part, make_table()); - curr_table - = static_cast<table*>(curr_table->get(part).get()); - } - } - }; - - key_part_handler(parse_key(it, end, key_end, key_part_handler)); - - // consume the last "]]" - auto eat = make_consumer(it, end, [this]() { - throw_parse_exception("Unterminated table array name"); - }); - eat(']'); - eat(']'); - - consume_whitespace(it, end); - eol_or_comment(it, end); - } - - void parse_key_value(std::string::iterator& it, std::string::iterator& end, - table* curr_table) - { - auto key_end = [](char c) { return c == '='; }; - - auto key_part_handler = [&](const std::string& part) { - // two cases: this key part exists already, in which case it must - // be a table, or it doesn't exist in which case we must create - // an implicitly defined table - if (curr_table->contains(part)) - { - auto val = curr_table->get(part); - if (val->is_table()) - { - curr_table = static_cast<table*>(val.get()); - } - else - { - throw_parse_exception("Key " + part - + " already exists as a value"); - } - } - else - { - auto newtable = make_table(); - curr_table->insert(part, newtable); - curr_table = newtable.get(); - } - }; - - auto key = parse_key(it, end, key_end, key_part_handler); - - if (curr_table->contains(key)) - throw_parse_exception("Key " + key + " already present"); - if (it == end || *it != '=') - throw_parse_exception("Value must follow after a '='"); - ++it; - consume_whitespace(it, end); - curr_table->insert(key, parse_value(it, end)); - consume_whitespace(it, end); - } - - template <class KeyEndFinder, class KeyPartHandler> - std::string - parse_key(std::string::iterator& it, const std::string::iterator& end, - KeyEndFinder&& key_end, KeyPartHandler&& key_part_handler) - { - // parse the key as a series of one or more simple-keys joined with '.' - while (it != end && !key_end(*it)) - { - auto part = parse_simple_key(it, end); - consume_whitespace(it, end); - - if (it == end || key_end(*it)) - { - return part; - } - - if (*it != '.') - { - std::string errmsg{"Unexpected character in key: "}; - errmsg += '"'; - errmsg += *it; - errmsg += '"'; - throw_parse_exception(errmsg); - } - - key_part_handler(part); - - // consume the dot - ++it; - } - - throw_parse_exception("Unexpected end of key"); - } - - std::string parse_simple_key(std::string::iterator& it, - const std::string::iterator& end) - { - consume_whitespace(it, end); - - if (it == end) - throw_parse_exception("Unexpected end of key (blank key?)"); - - if (*it == '"' || *it == '\'') - { - return string_literal(it, end, *it); - } - else - { - auto bke = std::find_if(it, end, [](char c) { - return c == '.' || c == '=' || c == ']'; - }); - return parse_bare_key(it, bke); - } - } - - std::string parse_bare_key(std::string::iterator& it, - const std::string::iterator& end) - { - if (it == end) - { - throw_parse_exception("Bare key missing name"); - } - - auto key_end = end; - --key_end; - consume_backwards_whitespace(key_end, it); - ++key_end; - std::string key{it, key_end}; - - if (std::find(it, key_end, '#') != key_end) - { - throw_parse_exception("Bare key " + key + " cannot contain #"); - } - - if (std::find_if(it, key_end, - [](char c) { return c == ' ' || c == '\t'; }) - != key_end) - { - throw_parse_exception("Bare key " + key - + " cannot contain whitespace"); - } - - if (std::find_if(it, key_end, - [](char c) { return c == '[' || c == ']'; }) - != key_end) - { - throw_parse_exception("Bare key " + key - + " cannot contain '[' or ']'"); - } - - it = end; - return key; - } - - enum class parse_type - { - STRING = 1, - LOCAL_TIME, - LOCAL_DATE, - LOCAL_DATETIME, - OFFSET_DATETIME, - INT, - FLOAT, - BOOL, - ARRAY, - INLINE_TABLE - }; - - std::shared_ptr<base> parse_value(std::string::iterator& it, - std::string::iterator& end) - { - parse_type type = determine_value_type(it, end); - switch (type) - { - case parse_type::STRING: - return parse_string(it, end); - case parse_type::LOCAL_TIME: - return parse_time(it, end); - case parse_type::LOCAL_DATE: - case parse_type::LOCAL_DATETIME: - case parse_type::OFFSET_DATETIME: - return parse_date(it, end); - case parse_type::INT: - case parse_type::FLOAT: - return parse_number(it, end); - case parse_type::BOOL: - return parse_bool(it, end); - case parse_type::ARRAY: - return parse_array(it, end); - case parse_type::INLINE_TABLE: - return parse_inline_table(it, end); - default: - throw_parse_exception("Failed to parse value"); - } - } - - parse_type determine_value_type(const std::string::iterator& it, - const std::string::iterator& end) - { - if (it == end) - { - throw_parse_exception("Failed to parse value type"); - } - if (*it == '"' || *it == '\'') - { - return parse_type::STRING; - } - else if (is_time(it, end)) - { - return parse_type::LOCAL_TIME; - } - else if (auto dtype = date_type(it, end)) - { - return *dtype; - } - else if (is_number(*it) || *it == '-' || *it == '+' - || (*it == 'i' && it + 1 != end && it[1] == 'n' - && it + 2 != end && it[2] == 'f') - || (*it == 'n' && it + 1 != end && it[1] == 'a' - && it + 2 != end && it[2] == 'n')) - { - return determine_number_type(it, end); - } - else if (*it == 't' || *it == 'f') - { - return parse_type::BOOL; - } - else if (*it == '[') - { - return parse_type::ARRAY; - } - else if (*it == '{') - { - return parse_type::INLINE_TABLE; - } - throw_parse_exception("Failed to parse value type"); - } - - parse_type determine_number_type(const std::string::iterator& it, - const std::string::iterator& end) - { - // determine if we are an integer or a float - auto check_it = it; - if (*check_it == '-' || *check_it == '+') - ++check_it; - - if (check_it == end) - throw_parse_exception("Malformed number"); - - if (*check_it == 'i' || *check_it == 'n') - return parse_type::FLOAT; - - while (check_it != end && is_number(*check_it)) - ++check_it; - if (check_it != end && *check_it == '.') - { - ++check_it; - while (check_it != end && is_number(*check_it)) - ++check_it; - return parse_type::FLOAT; - } - else - { - return parse_type::INT; - } - } - - std::shared_ptr<value<std::string>> parse_string(std::string::iterator& it, - std::string::iterator& end) - { - auto delim = *it; - assert(delim == '"' || delim == '\''); - - // end is non-const here because we have to be able to potentially - // parse multiple lines in a string, not just one - auto check_it = it; - ++check_it; - if (check_it != end && *check_it == delim) - { - ++check_it; - if (check_it != end && *check_it == delim) - { - it = ++check_it; - return parse_multiline_string(it, end, delim); - } - } - return make_value<std::string>(string_literal(it, end, delim)); - } - - std::shared_ptr<value<std::string>> - parse_multiline_string(std::string::iterator& it, - std::string::iterator& end, char delim) - { - std::stringstream ss; - - auto is_ws = [](char c) { return c == ' ' || c == '\t'; }; - - bool consuming = false; - std::shared_ptr<value<std::string>> ret; - - auto handle_line = [&](std::string::iterator& local_it, - std::string::iterator& local_end) { - if (consuming) - { - local_it = std::find_if_not(local_it, local_end, is_ws); - - // whole line is whitespace - if (local_it == local_end) - return; - } - - consuming = false; - - while (local_it != local_end) - { - // handle escaped characters - if (delim == '"' && *local_it == '\\') - { - auto check = local_it; - // check if this is an actual escape sequence or a - // whitespace escaping backslash - ++check; - consume_whitespace(check, local_end); - if (check == local_end) - { - consuming = true; - break; - } - - ss << parse_escape_code(local_it, local_end); - continue; - } - - // if we can end the string - if (std::distance(local_it, local_end) >= 3) - { - auto check = local_it; - // check for """ - if (*check++ == delim && *check++ == delim - && *check++ == delim) - { - local_it = check; - ret = make_value<std::string>(ss.str()); - break; - } - } - - ss << *local_it++; - } - }; - - // handle the remainder of the current line - handle_line(it, end); - if (ret) - return ret; - - // start eating lines - while (detail::getline(input_, line_)) - { - ++line_number_; - - it = line_.begin(); - end = line_.end(); - - handle_line(it, end); - - if (ret) - return ret; - - if (!consuming) - ss << std::endl; - } - - throw_parse_exception("Unterminated multi-line basic string"); - } - - std::string string_literal(std::string::iterator& it, - const std::string::iterator& end, char delim) - { - ++it; - std::string val; - while (it != end) - { - // handle escaped characters - if (delim == '"' && *it == '\\') - { - val += parse_escape_code(it, end); - } - else if (*it == delim) - { - ++it; - consume_whitespace(it, end); - return val; - } - else - { - val += *it++; - } - } - throw_parse_exception("Unterminated string literal"); - } - - std::string parse_escape_code(std::string::iterator& it, - const std::string::iterator& end) - { - ++it; - if (it == end) - throw_parse_exception("Invalid escape sequence"); - char value; - if (*it == 'b') - { - value = '\b'; - } - else if (*it == 't') - { - value = '\t'; - } - else if (*it == 'n') - { - value = '\n'; - } - else if (*it == 'f') - { - value = '\f'; - } - else if (*it == 'r') - { - value = '\r'; - } - else if (*it == '"') - { - value = '"'; - } - else if (*it == '\\') - { - value = '\\'; - } - else if (*it == 'u' || *it == 'U') - { - return parse_unicode(it, end); - } - else - { - throw_parse_exception("Invalid escape sequence"); - } - ++it; - return std::string(1, value); - } - - std::string parse_unicode(std::string::iterator& it, - const std::string::iterator& end) - { - bool large = *it++ == 'U'; - auto codepoint = parse_hex(it, end, large ? 0x10000000 : 0x1000); - - if ((codepoint > 0xd7ff && codepoint < 0xe000) || codepoint > 0x10ffff) - { - throw_parse_exception( - "Unicode escape sequence is not a Unicode scalar value"); - } - - std::string result; - // See Table 3-6 of the Unicode standard - if (codepoint <= 0x7f) - { - // 1-byte codepoints: 00000000 0xxxxxxx - // repr: 0xxxxxxx - result += static_cast<char>(codepoint & 0x7f); - } - else if (codepoint <= 0x7ff) - { - // 2-byte codepoints: 00000yyy yyxxxxxx - // repr: 110yyyyy 10xxxxxx - // - // 0x1f = 00011111 - // 0xc0 = 11000000 - // - result += static_cast<char>(0xc0 | ((codepoint >> 6) & 0x1f)); - // - // 0x80 = 10000000 - // 0x3f = 00111111 - // - result += static_cast<char>(0x80 | (codepoint & 0x3f)); - } - else if (codepoint <= 0xffff) - { - // 3-byte codepoints: zzzzyyyy yyxxxxxx - // repr: 1110zzzz 10yyyyyy 10xxxxxx - // - // 0xe0 = 11100000 - // 0x0f = 00001111 - // - result += static_cast<char>(0xe0 | ((codepoint >> 12) & 0x0f)); - result += static_cast<char>(0x80 | ((codepoint >> 6) & 0x1f)); - result += static_cast<char>(0x80 | (codepoint & 0x3f)); - } - else - { - // 4-byte codepoints: 000uuuuu zzzzyyyy yyxxxxxx - // repr: 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx - // - // 0xf0 = 11110000 - // 0x07 = 00000111 - // - result += static_cast<char>(0xf0 | ((codepoint >> 18) & 0x07)); - result += static_cast<char>(0x80 | ((codepoint >> 12) & 0x3f)); - result += static_cast<char>(0x80 | ((codepoint >> 6) & 0x3f)); - result += static_cast<char>(0x80 | (codepoint & 0x3f)); - } - return result; - } - - uint32_t parse_hex(std::string::iterator& it, - const std::string::iterator& end, uint32_t place) - { - uint32_t value = 0; - while (place > 0) - { - if (it == end) - throw_parse_exception("Unexpected end of unicode sequence"); - - if (!is_hex(*it)) - throw_parse_exception("Invalid unicode escape sequence"); - - value += place * hex_to_digit(*it++); - place /= 16; - } - return value; - } - - uint32_t hex_to_digit(char c) - { - if (is_number(c)) - return static_cast<uint32_t>(c - '0'); - return 10 - + static_cast<uint32_t>(c - - ((c >= 'a' && c <= 'f') ? 'a' : 'A')); - } - - std::shared_ptr<base> parse_number(std::string::iterator& it, - const std::string::iterator& end) - { - auto check_it = it; - auto check_end = find_end_of_number(it, end); - - auto eat_sign = [&]() { - if (check_it != end && (*check_it == '-' || *check_it == '+')) - ++check_it; - }; - - auto check_no_leading_zero = [&]() { - if (check_it != end && *check_it == '0' && check_it + 1 != check_end - && check_it[1] != '.') - { - throw_parse_exception("Numbers may not have leading zeros"); - } - }; - - auto eat_digits = [&](bool (*check_char)(char)) { - auto beg = check_it; - while (check_it != end && check_char(*check_it)) - { - ++check_it; - if (check_it != end && *check_it == '_') - { - ++check_it; - if (check_it == end || !check_char(*check_it)) - throw_parse_exception("Malformed number"); - } - } - - if (check_it == beg) - throw_parse_exception("Malformed number"); - }; - - auto eat_hex = [&]() { eat_digits(&is_hex); }; - - auto eat_numbers = [&]() { eat_digits(&is_number); }; - - if (check_it != end && *check_it == '0' && check_it + 1 != check_end - && (check_it[1] == 'x' || check_it[1] == 'o' || check_it[1] == 'b')) - { - ++check_it; - char base = *check_it; - ++check_it; - if (base == 'x') - { - eat_hex(); - return parse_int(it, check_it, 16); - } - else if (base == 'o') - { - auto start = check_it; - eat_numbers(); - auto val = parse_int(start, check_it, 8, "0"); - it = start; - return val; - } - else // if (base == 'b') - { - auto start = check_it; - eat_numbers(); - auto val = parse_int(start, check_it, 2); - it = start; - return val; - } - } - - eat_sign(); - check_no_leading_zero(); - - if (check_it != end && check_it + 1 != end && check_it + 2 != end) - { - if (check_it[0] == 'i' && check_it[1] == 'n' && check_it[2] == 'f') - { - auto val = std::numeric_limits<double>::infinity(); - if (*it == '-') - val = -val; - it = check_it + 3; - return make_value(val); - } - else if (check_it[0] == 'n' && check_it[1] == 'a' - && check_it[2] == 'n') - { - auto val = std::numeric_limits<double>::quiet_NaN(); - if (*it == '-') - val = -val; - it = check_it + 3; - return make_value(val); - } - } - - eat_numbers(); - - if (check_it != end - && (*check_it == '.' || *check_it == 'e' || *check_it == 'E')) - { - bool is_exp = *check_it == 'e' || *check_it == 'E'; - - ++check_it; - if (check_it == end) - throw_parse_exception("Floats must have trailing digits"); - - auto eat_exp = [&]() { - eat_sign(); - check_no_leading_zero(); - eat_numbers(); - }; - - if (is_exp) - eat_exp(); - else - eat_numbers(); - - if (!is_exp && check_it != end - && (*check_it == 'e' || *check_it == 'E')) - { - ++check_it; - eat_exp(); - } - - return parse_float(it, check_it); - } - else - { - return parse_int(it, check_it); - } - } - - std::shared_ptr<value<int64_t>> parse_int(std::string::iterator& it, - const std::string::iterator& end, - int base = 10, - const char* prefix = "") - { - std::string v{it, end}; - v = prefix + v; - v.erase(std::remove(v.begin(), v.end(), '_'), v.end()); - it = end; - try - { - return make_value<int64_t>(std::stoll(v, nullptr, base)); - } - catch (const std::invalid_argument& ex) - { - throw_parse_exception("Malformed number (invalid argument: " - + std::string{ex.what()} + ")"); - } - catch (const std::out_of_range& ex) - { - throw_parse_exception("Malformed number (out of range: " - + std::string{ex.what()} + ")"); - } - } - - std::shared_ptr<value<double>> parse_float(std::string::iterator& it, - const std::string::iterator& end) - { - std::string v{it, end}; - v.erase(std::remove(v.begin(), v.end(), '_'), v.end()); - it = end; - char decimal_point = std::localeconv()->decimal_point[0]; - std::replace(v.begin(), v.end(), '.', decimal_point); - try - { - return make_value<double>(std::stod(v)); - } - catch (const std::invalid_argument& ex) - { - throw_parse_exception("Malformed number (invalid argument: " - + std::string{ex.what()} + ")"); - } - catch (const std::out_of_range& ex) - { - throw_parse_exception("Malformed number (out of range: " - + std::string{ex.what()} + ")"); - } - } - - std::shared_ptr<value<bool>> parse_bool(std::string::iterator& it, - const std::string::iterator& end) - { - auto eat = make_consumer(it, end, [this]() { - throw_parse_exception("Attempted to parse invalid boolean value"); - }); - - if (*it == 't') - { - eat("true"); - return make_value<bool>(true); - } - else if (*it == 'f') - { - eat("false"); - return make_value<bool>(false); - } - - eat.error(); - return nullptr; - } - - std::string::iterator find_end_of_number(std::string::iterator it, - std::string::iterator end) - { - auto ret = std::find_if(it, end, [](char c) { - return !is_number(c) && c != '_' && c != '.' && c != 'e' && c != 'E' - && c != '-' && c != '+' && c != 'x' && c != 'o' && c != 'b'; - }); - if (ret != end && ret + 1 != end && ret + 2 != end) - { - if ((ret[0] == 'i' && ret[1] == 'n' && ret[2] == 'f') - || (ret[0] == 'n' && ret[1] == 'a' && ret[2] == 'n')) - { - ret = ret + 3; - } - } - return ret; - } - - std::string::iterator find_end_of_date(std::string::iterator it, - std::string::iterator end) - { - auto end_of_date = std::find_if(it, end, [](char c) { - return !is_number(c) && c != '-'; - }); - if (end_of_date != end && *end_of_date == ' ' && end_of_date + 1 != end - && is_number(end_of_date[1])) - end_of_date++; - return std::find_if(end_of_date, end, [](char c) { - return !is_number(c) && c != 'T' && c != 'Z' && c != ':' - && c != '-' && c != '+' && c != '.'; - }); - } - - std::string::iterator find_end_of_time(std::string::iterator it, - std::string::iterator end) - { - return std::find_if(it, end, [](char c) { - return !is_number(c) && c != ':' && c != '.'; - }); - } - - local_time read_time(std::string::iterator& it, - const std::string::iterator& end) - { - auto time_end = find_end_of_time(it, end); - - auto eat = make_consumer( - it, time_end, [&]() { throw_parse_exception("Malformed time"); }); - - local_time ltime; - - ltime.hour = eat.eat_digits(2); - eat(':'); - ltime.minute = eat.eat_digits(2); - eat(':'); - ltime.second = eat.eat_digits(2); - - int power = 100000; - if (it != time_end && *it == '.') - { - ++it; - while (it != time_end && is_number(*it)) - { - ltime.microsecond += power * (*it++ - '0'); - power /= 10; - } - } - - if (it != time_end) - throw_parse_exception("Malformed time"); - - return ltime; - } - - std::shared_ptr<value<local_time>> - parse_time(std::string::iterator& it, const std::string::iterator& end) - { - return make_value(read_time(it, end)); - } - - std::shared_ptr<base> parse_date(std::string::iterator& it, - const std::string::iterator& end) - { - auto date_end = find_end_of_date(it, end); - - auto eat = make_consumer( - it, date_end, [&]() { throw_parse_exception("Malformed date"); }); - - local_date ldate; - ldate.year = eat.eat_digits(4); - eat('-'); - ldate.month = eat.eat_digits(2); - eat('-'); - ldate.day = eat.eat_digits(2); - - if (it == date_end) - return make_value(ldate); - - eat.eat_or('T', ' '); - - local_datetime ldt; - static_cast<local_date&>(ldt) = ldate; - static_cast<local_time&>(ldt) = read_time(it, date_end); - - if (it == date_end) - return make_value(ldt); - - offset_datetime dt; - static_cast<local_datetime&>(dt) = ldt; - - int hoff = 0; - int moff = 0; - if (*it == '+' || *it == '-') - { - auto plus = *it == '+'; - ++it; - - hoff = eat.eat_digits(2); - dt.hour_offset = (plus) ? hoff : -hoff; - eat(':'); - moff = eat.eat_digits(2); - dt.minute_offset = (plus) ? moff : -moff; - } - else if (*it == 'Z') - { - ++it; - } - - if (it != date_end) - throw_parse_exception("Malformed date"); - - return make_value(dt); - } - - std::shared_ptr<base> parse_array(std::string::iterator& it, - std::string::iterator& end) - { - // this gets ugly because of the "homogeneity" restriction: - // arrays can either be of only one type, or contain arrays - // (each of those arrays could be of different types, though) - // - // because of the latter portion, we don't really have a choice - // but to represent them as arrays of base values... - ++it; - - // ugh---have to read the first value to determine array type... - skip_whitespace_and_comments(it, end); - - // edge case---empty array - if (*it == ']') - { - ++it; - return make_array(); - } - - auto val_end = std::find_if( - it, end, [](char c) { return c == ',' || c == ']' || c == '#'; }); - parse_type type = determine_value_type(it, val_end); - switch (type) - { - case parse_type::STRING: - return parse_value_array<std::string>(it, end); - case parse_type::LOCAL_TIME: - return parse_value_array<local_time>(it, end); - case parse_type::LOCAL_DATE: - return parse_value_array<local_date>(it, end); - case parse_type::LOCAL_DATETIME: - return parse_value_array<local_datetime>(it, end); - case parse_type::OFFSET_DATETIME: - return parse_value_array<offset_datetime>(it, end); - case parse_type::INT: - return parse_value_array<int64_t>(it, end); - case parse_type::FLOAT: - return parse_value_array<double>(it, end); - case parse_type::BOOL: - return parse_value_array<bool>(it, end); - case parse_type::ARRAY: - return parse_object_array<array>(&parser::parse_array, '[', it, - end); - case parse_type::INLINE_TABLE: - return parse_object_array<table_array>( - &parser::parse_inline_table, '{', it, end); - default: - throw_parse_exception("Unable to parse array"); - } - } - - template <class Value> - std::shared_ptr<array> parse_value_array(std::string::iterator& it, - std::string::iterator& end) - { - auto arr = make_array(); - while (it != end && *it != ']') - { - auto val = parse_value(it, end); - if (auto v = val->as<Value>()) - arr->get().push_back(val); - else - throw_parse_exception("Arrays must be homogeneous"); - skip_whitespace_and_comments(it, end); - if (*it != ',') - break; - ++it; - skip_whitespace_and_comments(it, end); - } - if (it != end) - ++it; - return arr; - } - - template <class Object, class Function> - std::shared_ptr<Object> parse_object_array(Function&& fun, char delim, - std::string::iterator& it, - std::string::iterator& end) - { - auto arr = detail::make_element<Object>(); - - while (it != end && *it != ']') - { - if (*it != delim) - throw_parse_exception("Unexpected character in array"); - - arr->get().push_back(((*this).*fun)(it, end)); - skip_whitespace_and_comments(it, end); - - if (it == end || *it != ',') - break; - - ++it; - skip_whitespace_and_comments(it, end); - } - - if (it == end || *it != ']') - throw_parse_exception("Unterminated array"); - - ++it; - return arr; - } - - std::shared_ptr<table> parse_inline_table(std::string::iterator& it, - std::string::iterator& end) - { - auto tbl = make_table(); - do - { - ++it; - if (it == end) - throw_parse_exception("Unterminated inline table"); - - consume_whitespace(it, end); - if (it != end && *it != '}') - { - parse_key_value(it, end, tbl.get()); - consume_whitespace(it, end); - } - } while (*it == ','); - - if (it == end || *it != '}') - throw_parse_exception("Unterminated inline table"); - - ++it; - consume_whitespace(it, end); - - return tbl; - } - - void skip_whitespace_and_comments(std::string::iterator& start, - std::string::iterator& end) - { - consume_whitespace(start, end); - while (start == end || *start == '#') - { - if (!detail::getline(input_, line_)) - throw_parse_exception("Unclosed array"); - line_number_++; - start = line_.begin(); - end = line_.end(); - consume_whitespace(start, end); - } - } - - void consume_whitespace(std::string::iterator& it, - const std::string::iterator& end) - { - while (it != end && (*it == ' ' || *it == '\t')) - ++it; - } - - void consume_backwards_whitespace(std::string::iterator& back, - const std::string::iterator& front) - { - while (back != front && (*back == ' ' || *back == '\t')) - --back; - } - - void eol_or_comment(const std::string::iterator& it, - const std::string::iterator& end) - { - if (it != end && *it != '#') - throw_parse_exception("Unidentified trailing character '" - + std::string{*it} - + "'---did you forget a '#'?"); - } - - bool is_time(const std::string::iterator& it, - const std::string::iterator& end) - { - auto time_end = find_end_of_time(it, end); - auto len = std::distance(it, time_end); - - if (len < 8) - return false; - - if (it[2] != ':' || it[5] != ':') - return false; - - if (len > 8) - return it[8] == '.' && len > 9; - - return true; - } - - option<parse_type> date_type(const std::string::iterator& it, - const std::string::iterator& end) - { - auto date_end = find_end_of_date(it, end); - auto len = std::distance(it, date_end); - - if (len < 10) - return {}; - - if (it[4] != '-' || it[7] != '-') - return {}; - - if (len >= 19 && (it[10] == 'T' || it[10] == ' ') - && is_time(it + 11, date_end)) - { - // datetime type - auto time_end = find_end_of_time(it + 11, date_end); - if (time_end == date_end) - return {parse_type::LOCAL_DATETIME}; - else - return {parse_type::OFFSET_DATETIME}; - } - else if (len == 10) - { - // just a regular date - return {parse_type::LOCAL_DATE}; - } - - return {}; - } - - std::istream& input_; - std::string line_; - std::size_t line_number_ = 0; -}; - -/** - * Utility function to parse a file as a TOML file. Returns the root table. - * Throws a parse_exception if the file cannot be opened. - */ -inline std::shared_ptr<table> parse_file(const std::string& filename) -{ -#if defined(BOOST_NOWIDE_FSTREAM_INCLUDED_HPP) - boost::nowide::ifstream file{filename.c_str()}; -#elif defined(NOWIDE_FSTREAM_INCLUDED_HPP) - nowide::ifstream file{filename.c_str()}; -#else - std::ifstream file{filename}; -#endif - if (!file.is_open()) - throw parse_exception{filename + " could not be opened for parsing"}; - parser p{file}; - return p.parse(); -} - -template <class... Ts> -struct value_accept; - -template <> -struct value_accept<> -{ - template <class Visitor, class... Args> - static void accept(const base&, Visitor&&, Args&&...) - { - // nothing - } -}; - -template <class T, class... Ts> -struct value_accept<T, Ts...> -{ - template <class Visitor, class... Args> - static void accept(const base& b, Visitor&& visitor, Args&&... args) - { - if (auto v = b.as<T>()) - { - visitor.visit(*v, std::forward<Args>(args)...); - } - else - { - value_accept<Ts...>::accept(b, std::forward<Visitor>(visitor), - std::forward<Args>(args)...); - } - } -}; - -/** - * base implementation of accept() that calls visitor.visit() on the concrete - * class. - */ -template <class Visitor, class... Args> -void base::accept(Visitor&& visitor, Args&&... args) const -{ - if (is_value()) - { - using value_acceptor - = value_accept<std::string, int64_t, double, bool, local_date, - local_time, local_datetime, offset_datetime>; - value_acceptor::accept(*this, std::forward<Visitor>(visitor), - std::forward<Args>(args)...); - } - else if (is_table()) - { - visitor.visit(static_cast<const table&>(*this), - std::forward<Args>(args)...); - } - else if (is_array()) - { - visitor.visit(static_cast<const array&>(*this), - std::forward<Args>(args)...); - } - else if (is_table_array()) - { - visitor.visit(static_cast<const table_array&>(*this), - std::forward<Args>(args)...); - } -} - -/** - * Writer that can be passed to accept() functions of cpptoml objects and - * will output valid TOML to a stream. - */ -class toml_writer -{ - public: - /** - * Construct a toml_writer that will write to the given stream - */ - toml_writer(std::ostream& s, const std::string& indent_space = "\t") - : stream_(s), indent_(indent_space), has_naked_endline_(false) - { - // nothing - } - - public: - /** - * Output a base value of the TOML tree. - */ - template <class T> - void visit(const value<T>& v, bool = false) - { - write(v); - } - - /** - * Output a table element of the TOML tree - */ - void visit(const table& t, bool in_array = false) - { - write_table_header(in_array); - std::vector<std::string> values; - std::vector<std::string> tables; - - for (const auto& i : t) - { - if (i.second->is_table() || i.second->is_table_array()) - { - tables.push_back(i.first); - } - else - { - values.push_back(i.first); - } - } - - for (unsigned int i = 0; i < values.size(); ++i) - { - path_.push_back(values[i]); - - if (i > 0) - endline(); - - write_table_item_header(*t.get(values[i])); - t.get(values[i])->accept(*this, false); - path_.pop_back(); - } - - for (unsigned int i = 0; i < tables.size(); ++i) - { - path_.push_back(tables[i]); - - if (values.size() > 0 || i > 0) - endline(); - - write_table_item_header(*t.get(tables[i])); - t.get(tables[i])->accept(*this, false); - path_.pop_back(); - } - - endline(); - } - - /** - * Output an array element of the TOML tree - */ - void visit(const array& a, bool = false) - { - write("["); - - for (unsigned int i = 0; i < a.get().size(); ++i) - { - if (i > 0) - write(", "); - - if (a.get()[i]->is_array()) - { - a.get()[i]->as_array()->accept(*this, true); - } - else - { - a.get()[i]->accept(*this, true); - } - } - - write("]"); - } - - /** - * Output a table_array element of the TOML tree - */ - void visit(const table_array& t, bool = false) - { - for (unsigned int j = 0; j < t.get().size(); ++j) - { - if (j > 0) - endline(); - - t.get()[j]->accept(*this, true); - } - - endline(); - } - - /** - * Escape a string for output. - */ - static std::string escape_string(const std::string& str) - { - std::string res; - for (auto it = str.begin(); it != str.end(); ++it) - { - if (*it == '\b') - { - res += "\\b"; - } - else if (*it == '\t') - { - res += "\\t"; - } - else if (*it == '\n') - { - res += "\\n"; - } - else if (*it == '\f') - { - res += "\\f"; - } - else if (*it == '\r') - { - res += "\\r"; - } - else if (*it == '"') - { - res += "\\\""; - } - else if (*it == '\\') - { - res += "\\\\"; - } - else if (static_cast<uint32_t>(*it) <= UINT32_C(0x001f)) - { - res += "\\u"; - std::stringstream ss; - ss << std::hex << static_cast<uint32_t>(*it); - res += ss.str(); - } - else - { - res += *it; - } - } - return res; - } - - protected: - /** - * Write out a string. - */ - void write(const value<std::string>& v) - { - write("\""); - write(escape_string(v.get())); - write("\""); - } - - /** - * Write out a double. - */ - void write(const value<double>& v) - { - std::stringstream ss; - ss << std::showpoint - << std::setprecision(std::numeric_limits<double>::max_digits10) - << v.get(); - - auto double_str = ss.str(); - auto pos = double_str.find("e0"); - if (pos != std::string::npos) - double_str.replace(pos, 2, "e"); - pos = double_str.find("e-0"); - if (pos != std::string::npos) - double_str.replace(pos, 3, "e-"); - - stream_ << double_str; - has_naked_endline_ = false; - } - - /** - * Write out an integer, local_date, local_time, local_datetime, or - * offset_datetime. - */ - template <class T> - typename std::enable_if< - is_one_of<T, int64_t, local_date, local_time, local_datetime, - offset_datetime>::value>::type - write(const value<T>& v) - { - write(v.get()); - } - - /** - * Write out a boolean. - */ - void write(const value<bool>& v) - { - write((v.get() ? "true" : "false")); - } - - /** - * Write out the header of a table. - */ - void write_table_header(bool in_array = false) - { - if (!path_.empty()) - { - indent(); - - write("["); - - if (in_array) - { - write("["); - } - - for (unsigned int i = 0; i < path_.size(); ++i) - { - if (i > 0) - { - write("."); - } - - if (path_[i].find_first_not_of("ABCDEFGHIJKLMNOPQRSTUVWXYZabcde" - "fghijklmnopqrstuvwxyz0123456789" - "_-") - == std::string::npos) - { - write(path_[i]); - } - else - { - write("\""); - write(escape_string(path_[i])); - write("\""); - } - } - - if (in_array) - { - write("]"); - } - - write("]"); - endline(); - } - } - - /** - * Write out the identifier for an item in a table. - */ - void write_table_item_header(const base& b) - { - if (!b.is_table() && !b.is_table_array()) - { - indent(); - - if (path_.back().find_first_not_of("ABCDEFGHIJKLMNOPQRSTUVWXYZabcde" - "fghijklmnopqrstuvwxyz0123456789" - "_-") - == std::string::npos) - { - write(path_.back()); - } - else - { - write("\""); - write(escape_string(path_.back())); - write("\""); - } - - write(" = "); - } - } - - private: - /** - * Indent the proper number of tabs given the size of - * the path. - */ - void indent() - { - for (std::size_t i = 1; i < path_.size(); ++i) - write(indent_); - } - - /** - * Write a value out to the stream. - */ - template <class T> - void write(const T& v) - { - stream_ << v; - has_naked_endline_ = false; - } - - /** - * Write an endline out to the stream - */ - void endline() - { - if (!has_naked_endline_) - { - stream_ << "\n"; - has_naked_endline_ = true; - } - } - - private: - std::ostream& stream_; - const std::string indent_; - std::vector<std::string> path_; - bool has_naked_endline_; -}; - -inline std::ostream& operator<<(std::ostream& stream, const base& b) -{ - toml_writer writer{stream}; - b.accept(writer); - return stream; -} - -template <class T> -std::ostream& operator<<(std::ostream& stream, const value<T>& v) -{ - toml_writer writer{stream}; - v.accept(writer); - return stream; -} - -inline std::ostream& operator<<(std::ostream& stream, const table& t) -{ - toml_writer writer{stream}; - t.accept(writer); - return stream; -} - -inline std::ostream& operator<<(std::ostream& stream, const table_array& t) -{ - toml_writer writer{stream}; - t.accept(writer); - return stream; -} - -inline std::ostream& operator<<(std::ostream& stream, const array& a) -{ - toml_writer writer{stream}; - a.accept(writer); - return stream; -} -} // namespace cpptoml -#endif // CPPTOML_H diff --git a/src/libexpr/primops/fromTOML.cc b/src/libexpr/primops/fromTOML.cc index 4c6682dfd..bfea1ce34 100644 --- a/src/libexpr/primops/fromTOML.cc +++ b/src/libexpr/primops/fromTOML.cc @@ -1,86 +1,77 @@ #include "primops.hh" #include "eval-inline.hh" -#include "../../cpptoml/cpptoml.h" +#include "../../toml11/toml.hpp" namespace nix { -static void prim_fromTOML(EvalState & state, const Pos & pos, Value * * args, Value & v) +static void prim_fromTOML(EvalState & state, const Pos & pos, Value * * args, Value & val) { - using namespace cpptoml; - auto toml = state.forceStringNoCtx(*args[0], pos); std::istringstream tomlStream(toml); - std::function<void(Value &, std::shared_ptr<base>)> visit; + std::function<void(Value &, toml::value)> visit; - visit = [&](Value & v, std::shared_ptr<base> t) { + visit = [&](Value & v, toml::value t) { - if (auto t2 = t->as_table()) { + switch(t.type()) + { + case toml::value_t::table: + { + auto table = toml::get<toml::table>(t); - size_t size = 0; - for (auto & i : *t2) { (void) i; size++; } + size_t size = 0; + for (auto & i : table) { (void) i; size++; } - state.mkAttrs(v, size); + state.mkAttrs(v, size); - for (auto & i : *t2) { - auto & v2 = *state.allocAttr(v, state.symbols.create(i.first)); + for(auto & elem: table) { - if (auto i2 = i.second->as_table_array()) { - size_t size2 = i2->get().size(); - state.mkList(v2, size2); - for (size_t j = 0; j < size2; ++j) - visit(*(v2.listElems()[j] = state.allocValue()), i2->get()[j]); + auto & v2 = *state.allocAttr(v, state.symbols.create(elem.first)); + visit(v2, elem.second); + } } - else - visit(v2, i.second); - } - - v.attrs->sort(); - } - - else if (auto t2 = t->as_array()) { - size_t size = t2->get().size(); - - state.mkList(v, size); - - for (size_t i = 0; i < size; ++i) - visit(*(v.listElems()[i] = state.allocValue()), t2->get()[i]); - } - - // Handle cases like 'a = [[{ a = true }]]', which IMHO should be - // parsed as a array containing an array containing a table, - // but instead are parsed as an array containing a table array - // containing a table. - else if (auto t2 = t->as_table_array()) { - size_t size = t2->get().size(); - - state.mkList(v, size); - - for (size_t j = 0; j < size; ++j) - visit(*(v.listElems()[j] = state.allocValue()), t2->get()[j]); - } + break;; + case toml::value_t::array: + { + auto array = toml::get<std::vector<toml::value>>(t); + + size_t size = array.size(); + state.mkList(v, size); + for (size_t i = 0; i < size; ++i) + visit(*(v.listElems()[i] = state.allocValue()), array[i]); + } + break;; + case toml::value_t::boolean: + mkBool(v, toml::get<bool>(t)); + break;; + case toml::value_t::integer: + mkInt(v, toml::get<long>(t)); + break;; + case toml::value_t::floating: + mkFloat(v, toml::get<double>(t)); + break;; + case toml::value_t::string: + mkString(v, toml::get<std::string>(t)); + break;; + case toml::value_t::local_datetime: + case toml::value_t::offset_datetime: + case toml::value_t::local_date: + case toml::value_t::local_time: + // We fail since Nix doesn't have date and time types + throw std::runtime_error("Dates and times are not supported"); + break;; + case toml::value_t::empty: + mkNull(v); + break;; - else if (t->is_value()) { - if (auto val = t->as<int64_t>()) - mkInt(v, val->get()); - else if (auto val = t->as<NixFloat>()) - mkFloat(v, val->get()); - else if (auto val = t->as<bool>()) - mkBool(v, val->get()); - else if (auto val = t->as<std::string>()) - mkString(v, val->get()); - else - throw EvalError("unsupported value type in TOML"); } - - else abort(); }; try { - visit(v, parser(tomlStream).parse()); - } catch (std::runtime_error & e) { + visit(val, toml::parse(tomlStream, "fromTOML" /* the "filename" */)); + } catch (std::exception & e) { // TODO: toml::syntax_error throw EvalError({ .msg = hintfmt("while parsing a TOML string: %s", e.what()), .errPos = pos diff --git a/src/toml11/LICENSE b/src/toml11/LICENSE new file mode 100644 index 000000000..f55c511d6 --- /dev/null +++ b/src/toml11/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2017 Toru Niina + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/src/toml11/README.md b/src/toml11/README.md new file mode 100644 index 000000000..62b586305 --- /dev/null +++ b/src/toml11/README.md @@ -0,0 +1,1966 @@ +toml11 +====== + +[](https://github.com/ToruNiina/toml11/actions) +[](https://travis-ci.org/ToruNiina/toml11) +[](https://ci.appveyor.com/project/ToruNiina/toml11/branch/master) +[](https://circleci.com/gh/ToruNiina/toml11/tree/master) +[](https://github.com/ToruNiina/toml11/releases) +[](LICENSE) +[](https://doi.org/10.5281/zenodo.1209136) + +toml11 is a C++11 (or later) header-only toml parser/encoder depending only on C++ standard library. + +- It is compatible to the latest version of [TOML v1.0.0](https://toml.io/en/v1.0.0). +- It is one of the most TOML standard compliant libraries, tested with [the language agnostic test suite for TOML parsers by BurntSushi](https://github.com/BurntSushi/toml-test). +- It shows highly informative error messages. You can see the error messages about invalid files at [CircleCI](https://circleci.com/gh/ToruNiina/toml11). +- It has configurable container. You can use any random-access containers and key-value maps as backend containers. +- It optionally preserves comments without any overhead. +- It has configurable serializer that supports comments, inline tables, literal strings and multiline strings. +- It supports user-defined type conversion from/into toml values. +- It correctly handles UTF-8 sequences, with or without BOM, both on posix and Windows. + +## Example + +```cpp +#include <toml.hpp> +#include <iostream> + +int main() +{ + // ```toml + // title = "an example toml file" + // nums = [3, 1, 4, 1, 5] + // ``` + auto data = toml::parse("example.toml"); + + // find a value with the specified type from a table + std::string title = toml::find<std::string>(data, "title"); + + // convert the whole array into any container automatically + std::vector<int> nums = toml::find<std::vector<int>>(data, "nums"); + + // access with STL-like manner + if(!data.contains("foo")) + { + data["foo"] = "bar"; + } + + // pass a fallback + std::string name = toml::find_or<std::string>(data, "name", "not found"); + + // width-dependent formatting + std::cout << std::setw(80) << data << std::endl; + + return 0; +} +``` + +## Table of Contents + +- [Integration](#integration) +- [Decoding a toml file](#decoding-a-toml-file) + - [In the case of syntax error](#in-the-case-of-syntax-error) + - [Invalid UTF-8 Codepoints](#invalid-utf-8-codepoints) +- [Finding a toml value](#finding-a-toml-value) + - [Finding a value in a table](#finding-a-value-in-a-table) + - [In case of error](#in-case-of-error) + - [Dotted keys](#dotted-keys) +- [Casting a toml value](#casting-a-toml-value) +- [Checking value type](#checking-value-type) +- [More about conversion](#more-about-conversion) + - [Converting an array](#converting-an-array) + - [Converting a table](#converting-a-table) + - [Getting an array of tables](#getting-an-array-of-tables) + - [Cost of conversion](#cost-of-conversion) + - [Converting datetime and its variants](#converting-datetime-and-its-variants) +- [Getting with a fallback](#getting-with-a-fallback) +- [Expecting conversion](#expecting-conversion) +- [Visiting a toml::value](#visiting-a-tomlvalue) +- [Constructing a toml::value](#constructing-a-tomlvalue) +- [Preserving Comments](#preserving-comments) +- [Customizing containers](#customizing-containers) +- [TOML literal](#toml-literal) +- [Conversion between toml value and arbitrary types](#conversion-between-toml-value-and-arbitrary-types) +- [Formatting user-defined error messages](#formatting-user-defined-error-messages) +- [Obtaining location information](#obtaining-location-information) +- [Exceptions](#exceptions) +- [Colorize Error Messages](#colorize-error-messages) +- [Serializing TOML data](#serializing-toml-data) +- [Underlying types](#underlying-types) +- [Unreleased TOML features](#unreleased-toml-features) +- [Breaking Changes from v2](#breaking-changes-from-v2) +- [Running Tests](#running-tests) +- [Contributors](#contributors) +- [Licensing Terms](#licensing-terms) + +## Integration + +Just include the file after adding it to the include path. + +```cpp +#include <toml.hpp> // that's all! now you can use it. +#include <iostream> + +int main() +{ + const auto data = toml::parse("example.toml"); + const auto title = toml::find<std::string>(data, "title"); + std::cout << "the title is " << title << std::endl; + return 0; +} +``` + +The convenient way is to add this repository as a git-submodule or to install +it in your system by CMake. + +Note for MSVC: We recommend to set `/Zc:__cplusplus` to detect C++ version correctly. + +## Decoding a toml file + +To parse a toml file, the only thing you have to do is +to pass a filename to the `toml::parse` function. + +```cpp +const std::string fname("sample.toml"); +const toml::value data = toml::parse(fname); +``` + +As required by the TOML specification, the top-level value is always a table. +You can find a value inside it, cast it into a table explicitly, and insert it as a value into other `toml::value`. + +If it encounters an error while opening a file, it will throw `std::runtime_error`. + +You can also pass a `std::istream` to the `toml::parse` function. +To show a filename in an error message, however, it is recommended to pass the +filename with the stream. + +```cpp +std::ifstream ifs("sample.toml", std::ios_base::binary); +assert(ifs.good()); +const auto data = toml::parse(ifs, /*optional -> */ "sample.toml"); +``` + +**Note**: When you are **on Windows, open a file in binary mode**. +If a file is opened in text-mode, CRLF ("\r\n") will automatically be +converted to LF ("\n") and this causes inconsistency between file size +and the contents that would be read. This causes weird error. + +### In the case of syntax error + +If there is a syntax error in a toml file, `toml::parse` will throw +`toml::syntax_error` that inherits `std::exception`. + +toml11 has clean and informative error messages inspired by Rust and +it looks like the following. + +```console +terminate called after throwing an instance of 'toml::syntax_error' + what(): [error] toml::parse_table: invalid line format # error description + --> example.toml # file name + 3 | a = 42 = true # line num and content + | ^------ expected newline, but got '='. # error reason +``` + +If you (mistakenly) duplicate tables and got an error, it is helpful to see +where they are. toml11 shows both at the same time like the following. + +```console +terminate called after throwing an instance of 'toml::syntax_error' + what(): [error] toml::insert_value: table ("table") already exists. + --> duplicate-table.toml + 1 | [table] + | ~~~~~~~ table already exists here + ... + 3 | [table] + | ~~~~~~~ table defined twice +``` + +When toml11 encounters a malformed value, it tries to detect what type it is. +Then it shows hints to fix the format. An error message while reading one of +the malformed files in [the language agnostic test suite](https://github.com/BurntSushi/toml-test). +is shown below. + +```console +what(): [error] bad time: should be HH:MM:SS.subsec + --> ./datetime-malformed-no-secs.toml + 1 | no-secs = 1987-07-05T17:45Z + | ^------- HH:MM:SS.subsec + | +Hint: pass: 1979-05-27T07:32:00, 1979-05-27 07:32:00.999999 +Hint: fail: 1979-05-27T7:32:00, 1979-05-27 17:32 +``` + +You can find other examples in a job named `output_result` on +[CircleCI](https://circleci.com/gh/ToruNiina/toml11). + +Since the error message generation is generally a difficult task, the current +status is not ideal. If you encounter a weird error message, please let us know +and contribute to improve the quality! + +### Invalid UTF-8 codepoints + +It throws `syntax_error` if a value of an escape sequence +representing unicode character is not a valid UTF-8 codepoint. + +```console + what(): [error] toml::read_utf8_codepoint: input codepoint is too large. + --> utf8.toml + 1 | exceeds_unicode = "\U0011FFFF example" + | ^--------- should be in [0x00..0x10FFFF] +``` + +## Finding a toml value + +After parsing successfully, you can obtain the values from the result of +`toml::parse` using `toml::find` function. + +```toml +# sample.toml +answer = 42 +pi = 3.14 +numbers = [1,2,3] +time = 1979-05-27T07:32:00Z +``` + +``` cpp +const auto data = toml::parse("sample.toml"); +const auto answer = toml::find<std::int64_t >(data, "answer"); +const auto pi = toml::find<double >(data, "pi"); +const auto numbers = toml::find<std::vector<int>>(data, "numbers"); +const auto timepoint = toml::find<std::chrono::system_clock::time_point>(data, "time"); +``` + +By default, `toml::find` returns a `toml::value`. + +```cpp +const toml::value& answer = toml::find(data, "answer"); +``` + +When you pass an exact TOML type that does not require type conversion, +`toml::find` returns a reference without copying the value. + +```cpp +const auto data = toml::parse("sample.toml"); +const auto& answer = toml::find<toml::integer>(data, "answer"); +``` + +If the specified type requires conversion, you can't take a reference to the value. +See also [underlying types](#underlying-types). + +**NOTE**: For some technical reason, automatic conversion between `integer` and +`floating` is not supported. If you want to get a floating value even if a value +has integer value, you need to convert it manually after obtaining a value, +like the following. + +```cpp +const auto vx = toml::find(data, "x"); +double x = vx.is_floating() ? vx.as_floating(std::nothrow) : + static_cast<double>(vx.as_integer()); // it throws if vx is neither + // floating nor integer. +``` + +### Finding a value in a table + +There are several way to get a value defined in a table. +First, you can get a table as a normal value and find a value from the table. + +```toml +[fruit] +name = "apple" +[fruit.physical] +color = "red" +shape = "round" +``` + +``` cpp +const auto data = toml::parse("fruit.toml"); +const auto& fruit = toml::find(data, "fruit"); +const auto name = toml::find<std::string>(fruit, "name"); + +const auto& physical = toml::find(fruit, "physical"); +const auto color = toml::find<std::string>(physical, "color"); +const auto shape = toml::find<std::string>(physical, "shape"); +``` + +Here, variable `fruit` is a `toml::value` and can be used as the first argument +of `toml::find`. + +Second, you can pass as many arguments as the number of subtables to `toml::find`. + +```cpp +const auto data = toml::parse("fruit.toml"); +const auto color = toml::find<std::string>(data, "fruit", "physical", "color"); +const auto shape = toml::find<std::string>(data, "fruit", "physical", "shape"); +``` + +### Finding a value in an array + +You can find n-th value in an array by `toml::find`. + +```toml +values = ["foo", "bar", "baz"] +``` + +``` cpp +const auto data = toml::parse("sample.toml"); +const auto values = toml::find(data, "values"); +const auto bar = toml::find<std::string>(values, 1); +``` + +`toml::find` can also search array recursively. + +```cpp +const auto data = toml::parse("fruit.toml"); +const auto bar = toml::find<std::string>(data, "values", 1); +``` + +Before calling `toml::find`, you can check if a value corresponding to a key +exists. You can use both `bool toml::value::contains(const key&) const` and +`std::size_t toml::value::count(const key&) const`. Those behaves like the +`std::map::contains` and `std::map::count`. + +```cpp +const auto data = toml::parse("fruit.toml"); +if(data.contains("fruit") && data.at("fruit").count("physical") != 0) +{ + // ... +} +``` + +### In case of error + +If the value does not exist, `toml::find` throws `std::out_of_range` with the +location of the table. + +```console +terminate called after throwing an instance of 'std::out_of_range' + what(): [error] key "answer" not found + --> example.toml + 6 | [tab] + | ~~~~~ in this table +``` + +---- + +If the specified type differs from the actual value contained, it throws +`toml::type_error` that inherits `std::exception`. + +Similar to the case of syntax error, toml11 also displays clean error messages. +The error message when you choose `int` to get `string` value would be like this. + +```console +terminate called after throwing an instance of 'toml::type_error' + what(): [error] toml::value bad_cast to integer + --> example.toml + 3 | title = "TOML Example" + | ~~~~~~~~~~~~~~ the actual type is string +``` + +**NOTE**: In order to show this kind of error message, all the toml values have +a pointer to represent its range in a file. The entire contents of a file is +shared by `toml::value`s and remains on the heap memory. It is recommended to +destruct all the `toml::value` classes after configuring your application +if you have a large TOML file compared to the memory resource. + +### Dotted keys + +TOML v0.5.0 has a new feature named "dotted keys". +You can chain keys to represent the structure of the data. + +```toml +physical.color = "orange" +physical.shape = "round" +``` + +This is equivalent to the following. + +```toml +[physical] +color = "orange" +shape = "round" +``` + +You can get both of the above tables with the same c++ code. + +```cpp +const auto physical = toml::find(data, "physical"); +const auto color = toml::find<std::string>(physical, "color"); +``` + +The following code does not work for the above toml file. + +```cpp +// XXX this does not work! +const auto color = toml::find<std::string>(data, "physical.color"); +``` + +The above code works with the following toml file. + +```toml +"physical.color" = "orange" +# equivalent to {"physical.color": "orange"}, +# NOT {"physical": {"color": "orange"}}. +``` + + +## Casting a toml value + +### `toml::get` + +`toml::parse` returns `toml::value`. `toml::value` is a union type that can +contain one of the following types. + +- `toml::boolean` (`bool`) +- `toml::integer` (`std::int64_t`) +- `toml::floating` (`double`) +- `toml::string` (a type convertible to std::string) +- `toml::local_date` +- `toml::local_time` +- `toml::local_datetime` +- `toml::offset_datetime` +- `toml::array` (by default, `std::vector<toml::value>`) + - It depends. See [customizing containers](#customizing-containers) for detail. +- `toml::table` (by default, `std::unordered_map<toml::key, toml::value>`) + - It depends. See [customizing containers](#customizing-containers) for detail. + +To get a value inside, you can use `toml::get<T>()`. The usage is the same as +`toml::find<T>` (actually, `toml::find` internally uses `toml::get` after casting +a value to `toml::table`). + +``` cpp +const toml::value data = toml::parse("sample.toml"); +const toml::value answer_ = toml::get<toml::table >(data).at("answer"); +const std::int64_t answer = toml::get<std::int64_t>(answer_); +``` + +When you pass an exact TOML type that does not require type conversion, +`toml::get` returns a reference through which you can modify the content +(if the `toml::value` is `const`, it returns `const` reference). + +```cpp +toml::value data = toml::parse("sample.toml"); +toml::value answer_ = toml::get<toml::table >(data).at("answer"); +toml::integer& answer = toml::get<toml::integer>(answer_); +answer = 6 * 9; // write to data.answer. now `answer_` contains 54. +``` + +If the specified type requires conversion, you can't take a reference to the value. +See also [underlying types](#underlying-types). + +It also throws a `toml::type_error` if the type differs. + +### `as_xxx` + +You can also use a member function to cast a value. + +```cpp +const std::int64_t answer = data.as_table().at("answer").as_integer(); +``` + +It also throws a `toml::type_error` if the type differs. If you are sure that +the value `v` contains a value of the specified type, you can suppress checking +by passing `std::nothrow`. + +```cpp +const auto& answer = data.as_table().at("answer"); +if(answer.is_integer() && answer.as_integer(std::nothrow) == 42) +{ + std::cout << "value is 42" << std::endl; +} +``` + +If `std::nothrow` is passed, the functions are marked as noexcept. + +By casting a `toml::value` into an array or a table, you can iterate over the +elements. + +```cpp +const auto data = toml::parse("example.toml"); +std::cout << "keys in the top-level table are the following: \n"; +for(const auto& [k, v] : data.as_table()) +{ + std::cout << k << '\n'; +} + +const auto& fruits = toml::find(data, "fruits"); +for(const auto& v : fruits.as_array()) +{ + std::cout << toml::find<std::string>(v, "name") << '\n'; +} +``` + +The full list of the functions is below. + +```cpp +namespace toml { +class value { + // ... + const boolean& as_boolean() const&; + const integer& as_integer() const&; + const floating& as_floating() const&; + const string& as_string() const&; + const offset_datetime& as_offset_datetime() const&; + const local_datetime& as_local_datetime() const&; + const local_date& as_local_date() const&; + const local_time& as_local_time() const&; + const array& as_array() const&; + const table& as_table() const&; + // -------------------------------------------------------- + // non-const version + boolean& as_boolean() &; + // ditto... + // -------------------------------------------------------- + // rvalue version + boolean&& as_boolean() &&; + // ditto... + + // -------------------------------------------------------- + // noexcept versions ... + const boolean& as_boolean(const std::nothrow_t&) const& noexcept; + boolean& as_boolean(const std::nothrow_t&) & noexcept; + boolean&& as_boolean(const std::nothrow_t&) && noexcept; + // ditto... +}; +} // toml +``` + +### `at()` + +You can access to the element of a table and an array by `toml::basic_value::at`. + +```cpp +const toml::value v{1,2,3,4,5}; +std::cout << v.at(2).as_integer() << std::endl; // 3 + +const toml::value v{{"foo", 42}, {"bar", 3.14}}; +std::cout << v.at("foo").as_integer() << std::endl; // 42 +``` + +If an invalid key (integer for a table, string for an array), it throws +`toml::type_error` for the conversion. If the provided key is out-of-range, +it throws `std::out_of_range`. + +Note that, although `std::string` has `at()` member function, `toml::value::at` +throws if the contained type is a string. Because `std::string` does not +contain `toml::value`. + +### `operator[]` + +You can also access to the element of a table and an array by +`toml::basic_value::operator[]`. + +```cpp +const toml::value v{1,2,3,4,5}; +std::cout << v[2].as_integer() << std::endl; // 3 + +const toml::value v{{"foo", 42}, {"bar", 3.14}}; +std::cout << v["foo"].as_integer() << std::endl; // 42 +``` + +When you access to a `toml::value` that is not initialized yet via +`operator[](const std::string&)`, the `toml::value` will be a table, +just like the `std::map`. + +```cpp +toml::value v; // not initialized as a table. +v["foo"] = 42; // OK. `v` will be a table. +``` + +Contrary, if you access to a `toml::value` that contains an array via `operator[]`, +it does not check anything. It converts `toml::value` without type check and then +access to the n-th element without boundary check, just like the `std::vector::operator[]`. + +```cpp +toml::value v; // not initialized as an array +v[2] = 42; // error! UB +``` + +Please make sure that the `toml::value` has an array inside when you access to +its element via `operator[]`. + +## Checking value type + +You can check the type of a value by `is_xxx` function. + +```cpp +const toml::value v = /* ... */; +if(v.is_integer()) +{ + std::cout << "value is an integer" << std::endl; +} +``` + +The complete list of the functions is below. + +```cpp +namespace toml { +class value { + // ... + bool is_boolean() const noexcept; + bool is_integer() const noexcept; + bool is_floating() const noexcept; + bool is_string() const noexcept; + bool is_offset_datetime() const noexcept; + bool is_local_datetime() const noexcept; + bool is_local_date() const noexcept; + bool is_local_time() const noexcept; + bool is_array() const noexcept; + bool is_table() const noexcept; + bool is_uninitialized() const noexcept; + // ... +}; +} // toml +``` + +Also, you can get `enum class value_t` from `toml::value::type()`. + +```cpp +switch(data.at("something").type()) +{ + case toml::value_t::integer: /*do some stuff*/ ; break; + case toml::value_t::floating: /*do some stuff*/ ; break; + case toml::value_t::string : /*do some stuff*/ ; break; + default : throw std::runtime_error( + "unexpected type : " + toml::stringize(data.at("something").type())); +} +``` + +The complete list of the `enum`s can be found in the section +[underlying types](#underlying-types). + +The `enum`s can be used as a parameter of `toml::value::is` function like the following. + +```cpp +toml::value v = /* ... */; +if(v.is(toml::value_t::boolean)) // ... +``` + +## More about conversion + +Since `toml::find` internally uses `toml::get`, all the following examples work +with both `toml::get` and `toml::find`. + +### Converting an array + +You can get any kind of `container` class from a `toml::array` +except for `map`-like classes. + +``` cpp +// # sample.toml +// numbers = [1,2,3] + +const auto numbers = toml::find(data, "numbers"); + +const auto vc = toml::get<std::vector<int> >(numbers); +const auto ls = toml::get<std::list<int> >(numbers); +const auto dq = toml::get<std::deque<int> >(numbers); +const auto ar = toml::get<std::array<int, 3>>(numbers); +// if the size of data.at("numbers") is larger than that of std::array, +// it will throw toml::type_error because std::array is not resizable. +``` + +Surprisingly, you can convert `toml::array` into `std::pair` and `std::tuple`. + +```cpp +// numbers = [1,2,3] +const auto tp = toml::get<std::tuple<short, int, unsigned int>>(numbers); +``` + +This functionality is helpful when you have a toml file like the following. + +```toml +array_of_arrays = [[1, 2, 3], ["foo", "bar", "baz"]] # toml allows this +``` + +What is the corresponding C++ type? +Obviously, it is a `std::pair` of `std::vector`s. + +```cpp +const auto array_of_arrays = toml::find(data, "array_of_arrays"); +const auto aofa = toml::get< + std::pair<std::vector<int>, std::vector<std::string>> + >(array_of_arrays); +``` + +If you don't know the type of the elements, you can use `toml::array`, +which is a `std::vector` of `toml::value`, instead. + +```cpp +const auto a_of_a = toml::get<toml::array>(array_of_arrays); +const auto first = toml::get<std::vector<int>>(a_of_a.at(0)); +``` + +You can change the implementation of `toml::array` with `std::deque` or some +other array-like container. See [Customizing containers](#customizing-containers) +for detail. + +### Converting a table + +When all the values of the table have the same type, toml11 allows you to +convert a `toml::table` to a `map` that contains the convertible type. + +```toml +[tab] +key1 = "foo" # all the values are +key2 = "bar" # toml String +``` + +```cpp +const auto data = toml::parse("sample.toml"); +const auto tab = toml::find<std::map<std::string, std::string>>(data, "tab"); +std::cout << tab["key1"] << std::endl; // foo +std::cout << tab["key2"] << std::endl; // bar +``` + +But since `toml::table` is just an alias of `std::unordered_map<toml::key, toml::value>`, +normally you don't need to convert it because it has all the functionalities that +`std::unordered_map` has (e.g. `operator[]`, `count`, and `find`). In most cases +`toml::table` is sufficient. + +```cpp +toml::table tab = toml::get<toml::table>(data); +if(data.count("title") != 0) +{ + data["title"] = std::string("TOML example"); +} +``` + +You can change the implementation of `toml::table` with `std::map` or some +other map-like container. See [Customizing containers](#customizing-containers) +for detail. + +### Getting an array of tables + +An array of tables is just an array of tables. +You can get it in completely the same way as the other arrays and tables. + +```toml +# sample.toml +array_of_inline_tables = [{key = "value1"}, {key = "value2"}, {key = "value3"}] + +[[array_of_tables]] +key = "value4" +[[array_of_tables]] +key = "value5" +[[array_of_tables]] +key = "value6" +``` + +```cpp +const auto data = toml::parse("sample.toml"); +const auto aot1 = toml::find<std::vector<toml::table>>(data, "array_of_inline_tables"); +const auto aot2 = toml::find<std::vector<toml::table>>(data, "array_of_tables"); +``` + +### Cost of conversion + +Although conversion through `toml::(get|find)` is convenient, it has additional +copy-cost because it copies data contained in `toml::value` to the +user-specified type. Of course in some cases this overhead is not ignorable. + +```cpp +// the following code constructs a std::vector. +// it requires heap allocation for vector and element conversion. +const auto array = toml::find<std::vector<int>>(data, "foo"); +``` + +By passing the exact types, `toml::get` returns reference that has no overhead. + +``` cpp +const auto& tab = toml::find<toml::table>(data, "tab"); +const auto& numbers = toml::find<toml::array>(data, "numbers"); +``` + +Also, `as_xxx` are zero-overhead because they always return a reference. + +``` cpp +const auto& tab = toml::find(data, "tab" ).as_table(); +const auto& numbers = toml::find(data, "numbers").as_array(); +``` + +In this case you need to call `toml::get` each time you access to +the element of `toml::array` because `toml::array` is an array of `toml::value`. + +```cpp +const auto& num0 = toml::get<toml::integer>(numbers.at(0)); +const auto& num1 = toml::get<toml::integer>(numbers.at(1)); +const auto& num2 = toml::get<toml::integer>(numbers.at(2)); +``` + +### Converting datetime and its variants + +TOML v0.5.0 has 4 different datetime objects, `local_date`, `local_time`, +`local_datetime`, and `offset_datetime`. + +Since `local_date`, `local_datetime`, and `offset_datetime` represent a time +point, you can convert them to `std::chrono::system_clock::time_point`. + +Contrary, `local_time` does not represents a time point because they lack a +date information, but it can be converted to `std::chrono::duration` that +represents a duration from the beginning of the day, `00:00:00.000`. + +```toml +# sample.toml +date = 2018-12-23 +time = 12:30:00 +l_dt = 2018-12-23T12:30:00 +o_dt = 2018-12-23T12:30:00+09:30 +``` + +```cpp +const auto data = toml::parse("sample.toml"); + +const auto date = toml::get<std::chrono::system_clock::time_point>(data.at("date")); +const auto l_dt = toml::get<std::chrono::system_clock::time_point>(data.at("l_dt")); +const auto o_dt = toml::get<std::chrono::system_clock::time_point>(data.at("o_dt")); + +const auto time = toml::get<std::chrono::minutes>(data.at("time")); // 12 * 60 + 30 min +``` + +`local_date` and `local_datetime` are assumed to be in the local timezone when +they are converted into `time_point`. On the other hand, `offset_datetime` only +uses the offset part of the data and it does not take local timezone into account. + +To contain datetime data, toml11 defines its own datetime types. +For more detail, you can see the definitions in [toml/datetime.hpp](toml/datetime.hpp). + +## Getting with a fallback + +`toml::find_or` returns a default value if the value is not found or has a +different type. + +```cpp +const auto data = toml::parse("example.toml"); +const auto num = toml::find_or(data, "num", 42); +``` + +It works recursively if you pass several keys for subtables. +In that case, the last argument is considered to be the optional value. +All other arguments between `toml::value` and the optinoal value are considered as keys. + +```cpp +// [fruit.physical] +// color = "red" +auto data = toml::parse("fruit.toml"); +auto color = toml::find_or(data, "fruit", "physical", "color", "red"); +// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^ +// arguments optional value +``` + +Also, `toml::get_or` returns a default value if `toml::get<T>` failed. + +```cpp +toml::value v("foo"); // v contains String +const int value = toml::get_or(v, 42); // conversion fails. it returns 42. +``` + +These functions automatically deduce what type you want to get +from the default value you passed. + +To get a reference through this function, take care about the default value. + +```cpp +toml::value v("foo"); // v contains String +toml::integer& i = toml::get_or(v, 42); // does not work because binding `42` + // to `integer&` is invalid +toml::integer opt = 42; +toml::integer& i = toml::get_or(v, opt); // this works. +``` + +## Expecting conversion + +By using `toml::expect`, you will get your expected value or an error message +without throwing `toml::type_error`. + +```cpp +const auto value = toml::expect<std::string>(data.at("title")); +if(value.is_ok()) { + std::cout << value.unwrap() << std::endl; +} else { + std::cout << value.unwrap_err() << std::endl; +} +``` + +Also, you can pass a function object to modify the expected value. + +```cpp +const auto value = toml::expect<int>(data.at("number")) + .map(// function that receives expected type (here, int) + [](const int number) -> double { + return number * 1.5 + 1.0; + }).unwrap_or(/*default value =*/ 3.14); +``` + +## Visiting a toml::value + +toml11 provides `toml::visit` to apply a function to `toml::value` in the +same way as `std::variant`. + +```cpp +const toml::value v(3.14); +toml::visit([](const auto& val) -> void { + std::cout << val << std::endl; + }, v); +``` + +The function object that would be passed to `toml::visit` must be able to +receive all the possible TOML types. Also, the result types should be the same +each other. + +## Constructing a toml::value + +`toml::value` can be constructed in various ways. + +```cpp +toml::value v(true); // boolean +toml::value v(42); // integer +toml::value v(3.14); // floating +toml::value v("foobar"); // string +toml::value v(toml::local_date(2019, toml::month_t::Apr, 1)); // date +toml::value v{1, 2, 3, 4, 5}; // array +toml::value v{{"foo", 42}, {"bar", 3.14}, {"baz", "qux"}}; // table +``` + +When constructing a string, you can choose to use either literal or basic string. +By default, it will be a basic string. + +```cpp +toml::value v("foobar", toml::string_t::basic ); +toml::value v("foobar", toml::string_t::literal); +``` + +Datetime objects can be constructed from `std::tm` and +`std::chrono::system_clock::time_point`. But you need to specify what type +you use to avoid ambiguity. + +```cpp +const auto now = std::chrono::system_clock::now(); +toml::value v(toml::local_date(now)); +toml::value v(toml::local_datetime(now)); +toml::value v(toml::offset_datetime(now)); +``` + +Since local time is not equivalent to a time point, because it lacks date +information, it will be constructed from `std::chrono::duration`. + +```cpp +toml::value v(toml::local_time(std::chrono::hours(10))); +``` + +You can construct an array object not only from `initializer_list`, but also +from STL containers. In that case, the element type must be convertible to +`toml::value`. + +```cpp +std::vector<int> vec{1,2,3,4,5}; +toml::value v(vec); +``` + +When you construct an array value, all the elements of `initializer_list` +must be convertible into `toml::value`. + +If a `toml::value` has an array, you can `push_back` an element in it. + +```cpp +toml::value v{1,2,3,4,5}; +v.push_back(6); +``` + +`emplace_back` also works. + +## Preserving comments + +toml11 v3 or later allows you yo choose whether comments are preserved or not via template parameter + +```cpp +const auto data1 = toml::parse<toml::discard_comments >("example.toml"); +const auto data2 = toml::parse<toml::preserve_comments>("example.toml"); +``` + +or macro definition. + +```cpp +#define TOML11_PRESERVE_COMMENTS_BY_DEFAULT +#include <toml11/toml.hpp> +``` + +This feature is controlled by template parameter in `toml::basic_value<...>`. +`toml::value` is an alias of `toml::basic_value<...>`. + +If template parameter is explicitly specified, the return value of `toml::parse` +will be `toml::basic_value<toml::preserve_comments>`. +If the macro is defined, the alias `toml::value` will be +`toml::basic_value<toml::preserve_comments>`. + +Comments related to a value can be obtained by `toml::value::comments()`. +The return value has the same interface as `std::vector<std::string>`. + +```cpp +const auto& com = v.comments(); +for(const auto& c : com) +{ + std::cout << c << std::endl; +} +``` + +Comments just before and just after (within the same line) a value are kept in a value. + +```toml +# this is a comment for v1. +v1 = "foo" + +v2 = "bar" # this is a comment for v2. +# Note that this comment is NOT a comment for v2. + +# this comment is not related to any value +# because there are empty lines between v3. +# this comment will be ignored even if you set `preserve_comments`. + +# this is a comment for v3 +# this is also a comment for v3. +v3 = "baz" # ditto. +``` + +Each comment line becomes one element of a `std::vector`. + +Hash signs will be removed, but spaces after hash sign will not be removed. + +```cpp +v1.comments().at(0) == " this is a comment for v1."s; + +v2.comments().at(1) == " this is a comment for v1."s; + +v3.comments().at(0) == " this is a comment for v3."s; +v3.comments().at(1) == " this is also a comment for v3."s; +v3.comments().at(2) == " ditto."s; +``` + +Note that a comment just after an opening brace of an array will not be a +comment for the array. + +```toml +# this is a comment for a. +a = [ # this is not a comment for a. this will be ignored. + 1, 2, 3, + # this is a comment for `42`. + 42, # this is also a comment for `42`. + 5 +] # this is a comment for a. +``` + +You can also append and modify comments. +The interfaces are the same as `std::vector<std::string>`. + +```cpp +toml::basic_value<toml::preserve_comments> v(42); +v.comments().push_back(" add this comment."); +// # add this comment. +// i = 42 +``` + +Also, you can pass a `std::vector<std::string>` when constructing a +`toml::basic_value<toml::preserve_comments>`. + +```cpp +std::vector<std::string> comments{"comment 1", "comment 2"}; +const toml::basic_value<toml::preserve_comments> v1(42, std::move(comments)); +const toml::basic_value<toml::preserve_comments> v2(42, {"comment 1", "comment 2"}); +``` + +When `toml::discard_comments` is chosen, comments will not be contained in a value. +`value::comments()` will always be kept empty. +All the modification on comments would be ignored. +All the element access in a `discard_comments` causes the same error as accessing +an element of an empty `std::vector`. + +The comments will also be serialized. If comments exist, those comments will be +added just before the values. + +__NOTE__: Result types from `toml::parse(...)` and +`toml::parse<toml::preserve_comments>(...)` are different. + +## Customizing containers + +Actually, `toml::basic_value` has 3 template arguments. + +```cpp +template<typename Comment, // discard/preserve_comment + template<typename ...> class Table = std::unordered_map, + template<typename ...> class Array = std::vector> +class basic_value; +``` + +This enables you to change the containers used inside. E.g. you can use +`std::map` to contain a table object instead of `std::unordered_map`. +And also can use `std::deque` as a array object instead of `std::vector`. + +You can set these parameters while calling `toml::parse` function. + +```cpp +const auto data = toml::parse< + toml::preserve_comments, std::map, std::deque + >("example.toml"); +``` + +Needless to say, the result types from `toml::parse(...)` and +`toml::parse<Com, Map, Cont>(...)` are different (unless you specify the same +types as default). + +Note that, since `toml::table` and `toml::array` is an alias for a table and an +array of a default `toml::value`, so it is different from the types actually +contained in a `toml::basic_value` when you customize containers. +To get the actual type in a generic way, use +`typename toml::basic_type<C, T, A>::table_type` and +`typename toml::basic_type<C, T, A>::array_type`. + +## TOML literal + +toml11 supports `"..."_toml` literal. +It accept both a bare value and a file content. + +```cpp +using namespace toml::literals::toml_literals; + +// `_toml` can convert a bare value without key +const toml::value v = u8"0xDEADBEEF"_toml; +// v is an Integer value containing 0xDEADBEEF. + +// raw string literal (`R"(...)"` is useful for this purpose) +const toml::value t = u8R"( + title = "this is TOML literal" + [table] + key = "value" +)"_toml; +// the literal will be parsed and the result will be contained in t +``` + +The literal function is defined in the same way as the standard library literals +such as `std::literals::string_literals::operator""s`. + +```cpp +namespace toml +{ +inline namespace literals +{ +inline namespace toml_literals +{ +toml::value operator"" _toml(const char* str, std::size_t len); +} // toml_literals +} // literals +} // toml +``` + +Access to the operator can be gained with `using namespace toml::literals;`, +`using namespace toml::toml_literals`, and `using namespace toml::literals::toml_literals`. + +Note that a key that is composed only of digits is allowed in TOML. +And, unlike the file parser, toml-literal allows a bare value without a key. +Thus it is difficult to distinguish arrays having integers and definitions of +tables that are named as digits. +Currently, literal `[1]` becomes a table named "1". +To ensure a literal to be considered as an array with one element, you need to +add a comma after the first element (like `[1,]`). + +```cpp +"[1,2,3]"_toml; // This is an array +"[table]"_toml; // This is a table that has an empty table named "table" inside. +"[[1,2,3]]"_toml; // This is an array of arrays +"[[table]]"_toml; // This is a table that has an array of tables inside. + +"[[1]]"_toml; // This literal is ambiguous. + // Currently, it becomes a table that has array of table "1". +"1 = [{}]"_toml; // This is a table that has an array of table named 1. +"[[1,]]"_toml; // This is an array of arrays. +"[[1],]"_toml; // ditto. +``` + +NOTE: `_toml` literal returns a `toml::value` that does not have comments. + +## Conversion between toml value and arbitrary types + +You can also use `toml::get` and other related functions with the types +you defined after you implement a way to convert it. + +```cpp +namespace ext +{ +struct foo +{ + int a; + double b; + std::string c; +}; +} // ext + +const auto data = toml::parse("example.toml"); + +// to do this +const foo f = toml::find<ext::foo>(data, "foo"); +``` + +There are 3 ways to use `toml::get` with the types that you defined. + +The first one is to implement `from_toml(const toml::value&)` member function. + +```cpp +namespace ext +{ +struct foo +{ + int a; + double b; + std::string c; + + void from_toml(const toml::value& v) + { + this->a = toml::find<int >(v, "a"); + this->b = toml::find<double >(v, "b"); + this->c = toml::find<std::string>(v, "c"); + return; + } +}; +} // ext +``` + +In this way, because `toml::get` first constructs `foo` without arguments, +the type should be default-constructible. + +The second is to implement `constructor(const toml::value&)`. + +```cpp +namespace ext +{ +struct foo +{ + explicit foo(const toml::value& v) + : a(toml::find<int>(v, "a")), b(toml::find<double>(v, "b")), + c(toml::find<std::string>(v, "c")) + {} + + int a; + double b; + std::string c; +}; +} // ext +``` + +Note that implicit default constructor declaration will be suppressed +when a constructor is defined. If you want to use the struct (here, `foo`) +in a container (e.g. `std::vector<foo>`), you may need to define default +constructor explicitly. + +The third is to implement specialization of `toml::from` for your type. + +```cpp +namespace ext +{ +struct foo +{ + int a; + double b; + std::string c; +}; +} // ext + +namespace toml +{ +template<> +struct from<ext::foo> +{ + static ext::foo from_toml(const value& v) + { + ext::foo f; + f.a = find<int >(v, "a"); + f.b = find<double >(v, "b"); + f.c = find<std::string>(v, "c"); + return f; + } +}; +} // toml +``` + +In this way, since the conversion function is defined outside of the class, +you can add conversion between `toml::value` and classes defined in another library. + +In some cases, a class has a templatized constructor that takes a template, `T`. +It confuses `toml::get/find<T>` because it makes the class "constructible" from +`toml::value`. To avoid this problem, `toml::from` and `from_toml` always +precede constructor. It makes easier to implement conversion between +`toml::value` and types defined in other libraries because it skips constructor. + +But, importantly, you cannot define `toml::from<T>` and `T.from_toml` at the same +time because it causes ambiguity in the overload resolution of `toml::get<T>` and `toml::find<T>`. + +So the precedence is `toml::from<T>` == `T.from_toml()` > `T(toml::value)`. + +If you want to convert any versions of `toml::basic_value`, +you need to templatize the conversion function as follows. + +```cpp +struct foo +{ + template<typename C, template<typename ...> class M, template<typename ...> class A> + void from_toml(const toml::basic_value<C, M, A>& v) + { + this->a = toml::find<int >(v, "a"); + this->b = toml::find<double >(v, "b"); + this->c = toml::find<std::string>(v, "c"); + return; + } +}; +// or +namespace toml +{ +template<> +struct from<ext::foo> +{ + template<typename C, template<typename ...> class M, template<typename ...> class A> + static ext::foo from_toml(const basic_value<C, M, A>& v) + { + ext::foo f; + f.a = find<int >(v, "a"); + f.b = find<double >(v, "b"); + f.c = find<std::string>(v, "c"); + return f; + } +}; +} // toml +``` + +---- + +The opposite direction is also supported in a similar way. You can directly +pass your type to `toml::value`'s constructor by introducing `into_toml` or +`toml::into<T>`. + +```cpp +namespace ext +{ +struct foo +{ + int a; + double b; + std::string c; + + toml::value into_toml() const // you need to mark it const. + { + return toml::value{{"a", this->a}, {"b", this->b}, {"c", this->c}}; + } +}; +} // ext + +ext::foo f{42, 3.14, "foobar"}; +toml::value v(f); +``` + +The definition of `toml::into<T>` is similar to `toml::from<T>`. + +```cpp +namespace ext +{ +struct foo +{ + int a; + double b; + std::string c; +}; +} // ext + +namespace toml +{ +template<> +struct into<ext::foo> +{ + static toml::value into_toml(const ext::foo& f) + { + return toml::value{{"a", f.a}, {"b", f.b}, {"c", f.c}}; + } +}; +} // toml + +ext::foo f{42, 3.14, "foobar"}; +toml::value v(f); +``` + +Any type that can be converted to `toml::value`, e.g. `int`, `toml::table` and +`toml::array` are okay to return from `into_toml`. + +You can also return a custom `toml::basic_value` from `toml::into`. + +```cpp +namespace toml +{ +template<> +struct into<ext::foo> +{ + static toml::basic_value<toml::preserve_comments> into_toml(const ext::foo& f) + { + toml::basic_value<toml::preserve_comments> v{{"a", f.a}, {"b", f.b}, {"c", f.c}}; + v.comments().push_back(" comment"); + return v; + } +}; +} // toml +``` + +But note that, if this `basic_value` would be assigned into other `toml::value` +that discards `comments`, the comments would be dropped. + +### Macro to automatically define conversion functions + +There is a helper macro that automatically generates conversion functions `from` and `into` for a simple struct. + +```cpp +namespace foo +{ +struct Foo +{ + std::string s; + double d; + int i; +}; +} // foo + +TOML11_DEFINE_CONVERSION_NON_INTRUSIVE(foo::Foo, s, d, i) + +int main() +{ + const auto file = toml::parse("example.toml"); + auto f = toml::find<foo::Foo>(file, "foo"); +} +``` + +And then you can use `toml::find<foo::Foo>(file, "foo");` + +**Note** that, because of a slight difference in implementation of preprocessor between gcc/clang and MSVC, [you need to define `/Zc:preprocessor`](https://github.com/ToruNiina/toml11/issues/139#issuecomment-803683682) to use it in MSVC (Thank you @glebm !). + +## Formatting user-defined error messages + +When you encounter an error after you read the toml value, you may want to +show the error with the value. + +toml11 provides you a function that formats user-defined error message with +related values. With a code like the following, + +```cpp +const auto value = toml::find<int>(data, "num"); +if(value < 0) +{ + std::cerr << toml::format_error("[error] value should be positive", + data.at("num"), "positive number required") + << std::endl; +} +``` + +you will get an error message like this. + +```console +[error] value should be positive + --> example.toml + 3 | num = -42 + | ~~~ positive number required +``` + +When you pass two values to `toml::format_error`, + +```cpp +const auto min = toml::find<int>(range, "min"); +const auto max = toml::find<int>(range, "max"); +if(max < min) +{ + std::cerr << toml::format_error("[error] max should be larger than min", + data.at("min"), "minimum number here", + data.at("max"), "maximum number here"); + << std::endl; +} +``` + +you will get an error message like this. + +```console +[error] max should be larger than min + --> example.toml + 3 | min = 54 + | ~~ minimum number here + ... + 4 | max = 42 + | ~~ maximum number here +``` + +You can print hints at the end of the message. + +```cpp +std::vector<std::string> hints; +hints.push_back("positive number means n >= 0."); +hints.push_back("negative number is not positive."); +std::cerr << toml::format_error("[error] value should be positive", + data.at("num"), "positive number required", hints) + << std::endl; +``` + +```console +[error] value should be positive + --> example.toml + 2 | num = 42 + | ~~ positive number required + | +Hint: positive number means n >= 0. +Hint: negative number is not positive. +``` + +## Obtaining location information + +You can also format error messages in your own way by using `source_location`. + +```cpp +struct source_location +{ + std::uint_least32_t line() const noexcept; + std::uint_least32_t column() const noexcept; + std::uint_least32_t region() const noexcept; + std::string const& file_name() const noexcept; + std::string const& line_str() const noexcept; +}; +// +-- line() +--- length of the region (here, region() == 9) +// v .---+---. +// 12 | value = "foo bar" <- line_str() returns the line itself. +// ^-------- column() points here +``` + +You can get this by +```cpp +const toml::value v = /*...*/; +const toml::source_location loc = v.location(); +``` + +## Exceptions + +The following `exception` classes inherits `toml::exception` that inherits +`std::exception`. + +```cpp +namespace toml { +struct exception : public std::exception {/**/}; +struct syntax_error : public toml::exception {/**/}; +struct type_error : public toml::exception {/**/}; +struct internal_error : public toml::exception {/**/}; +} // toml +``` + +`toml::exception` has `toml::exception::location()` member function that returns +`toml::source_location`, in addition to `what()`. + +```cpp +namespace toml { +struct exception : public std::exception +{ + // ... + source_location const& location() const noexcept; +}; +} // toml +``` + +It represents where the error occurs. + +`syntax_error` will be thrown from `toml::parse` and `_toml` literal. +`type_error` will be thrown from `toml::get/find`, `toml::value::as_xxx()`, and +other functions that takes a content inside of `toml::value`. + +Note that, currently, from `toml::value::at()` and `toml::find(value, key)` +may throw an `std::out_of_range` that does not inherits `toml::exception`. + +Also, in some cases, most likely in the file open error, it will throw an +`std::runtime_error`. + +## Colorize Error Messages + +By defining `TOML11_COLORIZE_ERROR_MESSAGE`, the error messages from +`toml::parse` and `toml::find|get` will be colorized. By default, this feature +is turned off. + +With the following toml file taken from `toml-lang/toml/tests/hard_example.toml`, + +```toml +[error] +array = [ + "This might most likely happen in multiline arrays", + Like here, + "or here, + and here" + ] End of array comment, forgot the # +``` + +the error message would be like this. + + + +With the following, + +```toml +[error] +# array = [ +# "This might most likely happen in multiline arrays", +# Like here, +# "or here, +# and here" +# ] End of array comment, forgot the # +number = 3.14 pi <--again forgot the # +``` + +the error message would be like this. + + + +The message would be messy when it is written to a file, not a terminal because +it uses [ANSI escape code](https://en.wikipedia.org/wiki/ANSI_escape_code). + +Without `TOML11_COLORIZE_ERROR_MESSAGE`, you can still colorize user-defined +error message by passing `true` to the `toml::format_error` function. +If you define `TOML11_COLORIZE_ERROR_MESSAGE`, the value is `true` by default. +If not, the default value would be `false`. + +```cpp +std::cerr << toml::format_error("[error] value should be positive", + data.at("num"), "positive number required", + hints, /*colorize = */ true) << std::endl; +``` + +Note: It colorize `[error]` in red. That means that it detects `[error]` prefix +at the front of the error message. If there is no `[error]` prefix, +`format_error` adds it to the error message. + +## Serializing TOML data + +toml11 enables you to serialize data into toml format. + +```cpp +const toml::value data{{"foo", 42}, {"bar", "baz"}}; +std::cout << data << std::endl; +// bar = "baz" +// foo = 42 +``` + +toml11 automatically makes a small table and small array inline. +You can specify the width to make them inline by `std::setw` for streams. + +```cpp +const toml::value data{ + {"qux", {{"foo", 42}, {"bar", "baz"}}}, + {"quux", {"small", "array", "of", "strings"}}, + {"foobar", {"this", "array", "of", "strings", "is", "too", "long", + "to", "print", "into", "single", "line", "isn't", "it?"}}, +}; + +// the threshold becomes 80. +std::cout << std::setw(80) << data << std::endl; +// foobar = [ +// "this","array","of","strings","is","too","long","to","print","into", +// "single","line","isn't","it?", +// ] +// quux = ["small","array","of","strings"] +// qux = {bar="baz",foo=42} + + +// the width is 0. nothing become inline. +std::cout << std::setw(0) << data << std::endl; +// foobar = [ +// "this", +// ... (snip) +// "it?", +// ] +// quux = [ +// "small", +// "array", +// "of", +// "strings", +// ] +// [qux] +// bar = "baz" +// foo = 42 +``` + +It is recommended to set width before printing data. Some I/O functions changes +width to 0, and it makes all the stuff (including `toml::array`) multiline. +The resulting files becomes too long. + +To control the precision of floating point numbers, you need to pass +`std::setprecision` to stream. + +```cpp +const toml::value data{ + {"pi", 3.141592653589793}, + {"e", 2.718281828459045} +}; +std::cout << std::setprecision(17) << data << std::endl; +// e = 2.7182818284590451 +// pi = 3.1415926535897931 +std::cout << std::setprecision( 7) << data << std::endl; +// e = 2.718282 +// pi = 3.141593 +``` + +There is another way to format toml values, `toml::format()`. +It returns `std::string` that represents a value. + +```cpp +const toml::value v{{"a", 42}}; +const std::string fmt = toml::format(v); +// a = 42 +``` + +Note that since `toml::format` formats a value, the resulting string may lack +the key value. + +```cpp +const toml::value v{3.14}; +const std::string fmt = toml::format(v); +// 3.14 +``` + +To control the width and precision, `toml::format` receives optional second and +third arguments to set them. By default, the width is 80 and the precision is +`std::numeric_limits<double>::max_digit10`. + +```cpp +const auto serial = toml::format(data, /*width = */ 0, /*prec = */ 17); +``` + +When you pass a comment-preserving-value, the comment will also be serialized. +An array or a table containing a value that has a comment would not be inlined. + +## Underlying types + +The toml types (can be used as `toml::*` in this library) and corresponding `enum` names are listed in the table below. + +| TOML type | underlying c++ type | enum class | +| -------------- | ---------------------------------- | -------------------------------- | +| Boolean | `bool` | `toml::value_t::boolean` | +| Integer | `std::int64_t` | `toml::value_t::integer` | +| Float | `double` | `toml::value_t::floating` | +| String | `toml::string` | `toml::value_t::string` | +| LocalDate | `toml::local_date` | `toml::value_t::local_date` | +| LocalTime | `toml::local_time` | `toml::value_t::local_time` | +| LocalDatetime | `toml::local_datetime` | `toml::value_t::local_datetime` | +| OffsetDatetime | `toml::offset_datetime` | `toml::value_t::offset_datetime` | +| Array | `array-like<toml::value>` | `toml::value_t::array` | +| Table | `map-like<toml::key, toml::value>` | `toml::value_t::table` | + +`array-like` and `map-like` are the STL containers that works like a `std::vector` and +`std::unordered_map`, respectively. By default, `std::vector` and `std::unordered_map` +are used. See [Customizing containers](#customizing-containers) for detail. + +`toml::string` is effectively the same as `std::string` but has an additional +flag that represents a kind of a string, `string_t::basic` and `string_t::literal`. +Although `std::string` is not an exact toml type, still you can get a reference +that points to internal `std::string` by using `toml::get<std::string>()` for convenience. +The most important difference between `std::string` and `toml::string` is that +`toml::string` will be formatted as a TOML string when outputted with `ostream`. +This feature is introduced to make it easy to write a custom serializer. + +`Datetime` variants are `struct` that are defined in this library. +Because `std::chrono::system_clock::time_point` is a __time point__, +not capable of representing a Local Time independent from a specific day. + +## Unreleased TOML features + +Since TOML v1.0.0-rc.1 has been released, those features are now activated by +default. We no longer need to define `TOML11_USE_UNRELEASED_FEATURES`. + +- Leading zeroes in exponent parts of floats are permitted. + - e.g. `1.0e+01`, `5e+05` + - [toml-lang/toml/PR/656](https://github.com/toml-lang/toml/pull/656) +- Allow raw tab characters in basic strings and multi-line basic strings. + - [toml-lang/toml/PR/627](https://github.com/toml-lang/toml/pull/627) +- Allow heterogeneous arrays + - [toml-lang/toml/PR/676](https://github.com/toml-lang/toml/pull/676) + +## Note about heterogeneous arrays + +Although `toml::parse` allows heterogeneous arrays, constructor of `toml::value` +does not. Here the reason is explained. + +```cpp +// this won't be compiled +toml::value v{ + "foo", 3.14, 42, {1,2,3,4,5}, {{"key", "value"}} +} +``` + +There is a workaround for this. By explicitly converting values into +`toml::value`, you can initialize `toml::value` with a heterogeneous array. +Also, you can first initialize a `toml::value` with an array and then +`push_back` into it. + +```cpp +// OK! +toml::value v{ + toml::value("foo"), toml::value(3.14), toml::value(42), + toml::value{1,2,3,4,5}, toml::value{{"key", "value"}} +} + +// OK! +toml::value v(toml::array{}); +v.push_back("foo"); +v.push_back(3.14); + +// OK! +toml::array a; +a.push_back("foo"); +a.push_back(3.14); +toml::value v(std::move(a)); +``` + +The reason why the first example is not allowed is the following. +Let's assume that you are initializing a `toml::value` with a table. + +```cpp + // # expecting TOML table. +toml::value v{ // [v] + {"answer", 42}, // answer = 42 + {"pi", 3.14}, // pi = 3.14 + {"foo", "bar"} // foo = "bar" +}; +``` + +This is indistinguishable from a (heterogeneous) TOML array definition. + +```toml +v = [ + ["answer", 42], + ["pi", 3.14], + ["foo", "bar"], +] +``` + +This means that the above C++ code makes constructor's overload resolution +ambiguous. So a constructor that allows both "table as an initializer-list" and +"heterogeneous array as an initializer-list" cannot be implemented. + +Thus, although it is painful, we need to explicitly cast values into +`toml::value` when you initialize heterogeneous array in a C++ code. + +```cpp +toml::value v{ + toml::value("foo"), toml::value(3.14), toml::value(42), + toml::value{1,2,3,4,5}, toml::value{{"key", "value"}} +}; +``` + +## Breaking Changes from v2 + +Although toml11 is relatively new library (it's three years old now), it had +some confusing and inconvenient user-interfaces because of historical reasons. + +Between v2 and v3, those interfaces are rearranged. + +- `toml::parse` now returns a `toml::value`, not `toml::table`. +- `toml::value` is now an alias of `toml::basic_value<discard_comment, std::vector, std::unordered_map>`. + - See [Customizing containers](#customizing-containers) for detail. +- The elements of `toml::value_t` are renamed as `snake_case`. + - See [Underlying types](#underlying-types) for detail. +- Supports for the CamelCaseNames are dropped. + - See [Underlying types](#underlying-types) for detail. +- `(is|as)_float` has been removed to make the function names consistent with others. + - Since `float` is a keyword, toml11 named a float type as `toml::floating`. + - Also a `value_t` corresponds to `toml::floating` is named `value_t::floating`. + - So `(is|as)_floating` is introduced and `is_float` has been removed. + - See [Casting a toml::value](#casting-a-tomlvalue) and [Checking value type](#checking-value-type) for detail. +- An overload of `toml::find` for `toml::table` has been dropped. Use `toml::value` version instead. + - Because type conversion between a table and a value causes ambiguity while overload resolution + - Since `toml::parse` now returns a `toml::value`, this feature becomes less important. + - Also because `toml::table` is a normal STL container, implementing utility function is easy. + - See [Finding a toml::value](#finding-a-toml-value) for detail. +- An overload of `operator<<` and `toml::format` for `toml::table`s are dropped. + - Use `toml::value` instead. + - See [Serializing TOML data](#serializing-toml-data) for detail. +- Interface around comments. + - See [Preserving Comments](#preserving-comments) for detail. +- An ancient `from_toml/into_toml` has been removed. Use arbitrary type conversion support. + - See [Conversion between toml value and arbitrary types](#conversion-between-toml-value-and-arbitrary-types) for detail. + +Such a big change will not happen in the coming years. + +## Running Tests + +After cloning this repository, run the following command (thank you @jwillikers +for automating test set fetching!). + +```sh +$ mkdir build +$ cd build +$ cmake .. -Dtoml11_BUILD_TEST=ON +$ make +$ make test +``` + +To run the language agnostic test suite, you need to compile +`tests/check_toml_test.cpp` and pass it to the tester. + +## Contributors + +I appreciate the help of the contributors who introduced the great feature to this library. + +- Guillaume Fraux (@Luthaf) + - Windows support and CI on Appvayor + - Intel Compiler support +- Quentin Khan (@xaxousis) + - Found & Fixed a bug around ODR + - Improved error messages for invalid keys to show the location where the parser fails +- Petr Beneš (@wbenny) + - Fixed warnings on MSVC +- Ivan Shynkarenka (@chronoxor) + - Fixed Visual Studio 2019 warnings +- @khoitd1997 + - Fixed warnings while type conversion +- @KerstinKeller + - Added installation script to CMake +- J.C. Moyer (@jcmoyer) + - Fixed an example code in the documentation +- Jt Freeman (@blockparty-sh) + - Fixed feature test macro around `localtime_s` + - Suppress warnings in Debug mode +- OGAWA Kenichi (@kenichiice) + - Suppress warnings on intel compiler +- Jordan Williams (@jwillikers) + - Fixed clang range-loop-analysis warnings + - Fixed feature test macro to suppress -Wundef + - Use cache variables in CMakeLists.txt + - Automate test set fetching, update and refactor CMakeLists.txt +- Scott McCaskill + - Parse 9 digits (nanoseconds) of fractional seconds in a `local_time` +- Shu Wang (@halfelf) + - fix "Finding a value in an array" example in README +- @maass-tv and @SeverinLeonhardt + - Fix MSVC warning C4866 +- OGAWA KenIchi (@kenichiice) + - Fix include path in README +- Mohammed Alyousef (@MoAlyousef) + - Made testing optional in CMake +- Ivan Shynkarenka (@chronoxor) + - Fix compilation error in `<filesystem>` with MinGW +- Alex Merry (@amerry) + - Add missing include files +- sneakypete81 (@sneakypete81) + - Fix typo in error message +- Oliver Kahrmann (@founderio) + - Fix missing filename in error message if parsed file is empty +- Karl Nilsson (@karl-nilsson) + - Fix many spelling errors +- ohdarling88 (@ohdarling) + - Fix a bug in a constructor of serializer +- estshorter (@estshorter) + - Fix MSVC warning C26478 +- Philip Top (@phlptp) + - Improve checking standard library feature availability check +- Louis Marascio (@marascio) + - Fix free-nonheap-object warning + + +## Licensing terms + +This product is licensed under the terms of the [MIT License](LICENSE). + +- Copyright (c) 2017-2021 Toru Niina + +All rights reserved. diff --git a/src/toml11/toml.hpp b/src/toml11/toml.hpp new file mode 100644 index 000000000..f34cfccca --- /dev/null +++ b/src/toml11/toml.hpp @@ -0,0 +1,46 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2017 Toru Niina + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#ifndef TOML_FOR_MODERN_CPP +#define TOML_FOR_MODERN_CPP + +#ifndef __cplusplus +# error "__cplusplus is not defined" +#endif + +#if __cplusplus < 201103L && _MSC_VER < 1900 +# error "toml11 requires C++11 or later." +#endif + +#define TOML11_VERSION_MAJOR 3 +#define TOML11_VERSION_MINOR 7 +#define TOML11_VERSION_PATCH 0 + +#include "toml/parser.hpp" +#include "toml/literal.hpp" +#include "toml/serializer.hpp" +#include "toml/get.hpp" +#include "toml/macros.hpp" + +#endif// TOML_FOR_MODERN_CPP diff --git a/src/toml11/toml/color.hpp b/src/toml11/toml/color.hpp new file mode 100644 index 000000000..4cb572cb0 --- /dev/null +++ b/src/toml11/toml/color.hpp @@ -0,0 +1,64 @@ +#ifndef TOML11_COLOR_HPP +#define TOML11_COLOR_HPP +#include <cstdint> +#include <ostream> + +#ifdef TOML11_COLORIZE_ERROR_MESSAGE +#define TOML11_ERROR_MESSAGE_COLORIZED true +#else +#define TOML11_ERROR_MESSAGE_COLORIZED false +#endif + +namespace toml +{ + +// put ANSI escape sequence to ostream +namespace color_ansi +{ +namespace detail +{ +inline int colorize_index() +{ + static const int index = std::ios_base::xalloc(); + return index; +} +} // detail + +inline std::ostream& colorize(std::ostream& os) +{ + // by default, it is zero. + os.iword(detail::colorize_index()) = 1; + return os; +} +inline std::ostream& nocolorize(std::ostream& os) +{ + os.iword(detail::colorize_index()) = 0; + return os; +} +inline std::ostream& reset (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[00m";} return os;} +inline std::ostream& bold (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[01m";} return os;} +inline std::ostream& grey (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[30m";} return os;} +inline std::ostream& red (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[31m";} return os;} +inline std::ostream& green (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[32m";} return os;} +inline std::ostream& yellow (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[33m";} return os;} +inline std::ostream& blue (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[34m";} return os;} +inline std::ostream& magenta(std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[35m";} return os;} +inline std::ostream& cyan (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[36m";} return os;} +inline std::ostream& white (std::ostream& os) +{if(os.iword(detail::colorize_index()) == 1) {os << "\033[37m";} return os;} +} // color_ansi + +// ANSI escape sequence is the only and default colorization method currently +namespace color = color_ansi; + +} // toml +#endif// TOML11_COLOR_HPP diff --git a/src/toml11/toml/combinator.hpp b/src/toml11/toml/combinator.hpp new file mode 100644 index 000000000..33ecca1eb --- /dev/null +++ b/src/toml11/toml/combinator.hpp @@ -0,0 +1,306 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_COMBINATOR_HPP +#define TOML11_COMBINATOR_HPP +#include <cassert> +#include <cctype> +#include <cstdio> + +#include <array> +#include <iomanip> +#include <iterator> +#include <limits> +#include <type_traits> + +#include "region.hpp" +#include "result.hpp" +#include "traits.hpp" +#include "utility.hpp" + +// they scans characters and returns region if it matches to the condition. +// when they fail, it does not change the location. +// in lexer.hpp, these are used. + +namespace toml +{ +namespace detail +{ + +// to output character as an error message. +inline std::string show_char(const char c) +{ + // It suppresses an error that occurs only in Debug mode of MSVC++ on Windows. + // I'm not completely sure but they check the value of char to be in the + // range [0, 256) and some of the COMPLETELY VALID utf-8 character sometimes + // has negative value (if char has sign). So here it re-interprets c as + // unsigned char through pointer. In general, converting pointer to a + // pointer that has different type cause UB, but `(signed|unsigned)?char` + // are one of the exceptions. Converting pointer only to char and std::byte + // (c++17) are valid. + if(std::isgraph(*reinterpret_cast<unsigned char const*>(std::addressof(c)))) + { + return std::string(1, c); + } + else + { + std::array<char, 5> buf; + buf.fill('\0'); + const auto r = std::snprintf( + buf.data(), buf.size(), "0x%02x", static_cast<int>(c) & 0xFF); + (void) r; // Unused variable warning + assert(r == static_cast<int>(buf.size()) - 1); + return std::string(buf.data()); + } +} + +template<char C> +struct character +{ + static constexpr char target = C; + + static result<region, none_t> + invoke(location& loc) + { + if(loc.iter() == loc.end()) {return none();} + const auto first = loc.iter(); + + const char c = *(loc.iter()); + if(c != target) + { + return none(); + } + loc.advance(); // update location + + return ok(region(loc, first, loc.iter())); + } +}; +template<char C> +constexpr char character<C>::target; + +// closed interval [Low, Up]. both Low and Up are included. +template<char Low, char Up> +struct in_range +{ + // assuming ascii part of UTF-8... + static_assert(Low <= Up, "lower bound should be less than upper bound."); + + static constexpr char upper = Up; + static constexpr char lower = Low; + + static result<region, none_t> + invoke(location& loc) + { + if(loc.iter() == loc.end()) {return none();} + const auto first = loc.iter(); + + const char c = *(loc.iter()); + if(c < lower || upper < c) + { + return none(); + } + + loc.advance(); + return ok(region(loc, first, loc.iter())); + } +}; +template<char L, char U> constexpr char in_range<L, U>::upper; +template<char L, char U> constexpr char in_range<L, U>::lower; + +// keep iterator if `Combinator` matches. otherwise, increment `iter` by 1 char. +// for detecting invalid characters, like control sequences in toml string. +template<typename Combinator> +struct exclude +{ + static result<region, none_t> + invoke(location& loc) + { + if(loc.iter() == loc.end()) {return none();} + auto first = loc.iter(); + + auto rslt = Combinator::invoke(loc); + if(rslt.is_ok()) + { + loc.reset(first); + return none(); + } + loc.reset(std::next(first)); // XXX maybe loc.advance() is okay but... + return ok(region(loc, first, loc.iter())); + } +}; + +// increment `iter`, if matches. otherwise, just return empty string. +template<typename Combinator> +struct maybe +{ + static result<region, none_t> + invoke(location& loc) + { + const auto rslt = Combinator::invoke(loc); + if(rslt.is_ok()) + { + return rslt; + } + return ok(region(loc)); + } +}; + +template<typename ... Ts> +struct sequence; + +template<typename Head, typename ... Tail> +struct sequence<Head, Tail...> +{ + static result<region, none_t> + invoke(location& loc) + { + const auto first = loc.iter(); + auto rslt = Head::invoke(loc); + if(rslt.is_err()) + { + loc.reset(first); + return none(); + } + return sequence<Tail...>::invoke(loc, std::move(rslt.unwrap()), first); + } + + // called from the above function only, recursively. + template<typename Iterator> + static result<region, none_t> + invoke(location& loc, region reg, Iterator first) + { + const auto rslt = Head::invoke(loc); + if(rslt.is_err()) + { + loc.reset(first); + return none(); + } + reg += rslt.unwrap(); // concat regions + return sequence<Tail...>::invoke(loc, std::move(reg), first); + } +}; + +template<typename Head> +struct sequence<Head> +{ + // would be called from sequence<T ...>::invoke only. + template<typename Iterator> + static result<region, none_t> + invoke(location& loc, region reg, Iterator first) + { + const auto rslt = Head::invoke(loc); + if(rslt.is_err()) + { + loc.reset(first); + return none(); + } + reg += rslt.unwrap(); // concat regions + return ok(reg); + } +}; + +template<typename ... Ts> +struct either; + +template<typename Head, typename ... Tail> +struct either<Head, Tail...> +{ + static result<region, none_t> + invoke(location& loc) + { + const auto rslt = Head::invoke(loc); + if(rslt.is_ok()) {return rslt;} + return either<Tail...>::invoke(loc); + } +}; +template<typename Head> +struct either<Head> +{ + static result<region, none_t> + invoke(location& loc) + { + return Head::invoke(loc); + } +}; + +template<typename T, typename N> +struct repeat; + +template<std::size_t N> struct exactly{}; +template<std::size_t N> struct at_least{}; +struct unlimited{}; + +template<typename T, std::size_t N> +struct repeat<T, exactly<N>> +{ + static result<region, none_t> + invoke(location& loc) + { + region retval(loc); + const auto first = loc.iter(); + for(std::size_t i=0; i<N; ++i) + { + auto rslt = T::invoke(loc); + if(rslt.is_err()) + { + loc.reset(first); + return none(); + } + retval += rslt.unwrap(); + } + return ok(std::move(retval)); + } +}; + +template<typename T, std::size_t N> +struct repeat<T, at_least<N>> +{ + static result<region, none_t> + invoke(location& loc) + { + region retval(loc); + + const auto first = loc.iter(); + for(std::size_t i=0; i<N; ++i) + { + auto rslt = T::invoke(loc); + if(rslt.is_err()) + { + loc.reset(first); + return none(); + } + retval += rslt.unwrap(); + } + while(true) + { + auto rslt = T::invoke(loc); + if(rslt.is_err()) + { + return ok(std::move(retval)); + } + retval += rslt.unwrap(); + } + } +}; + +template<typename T> +struct repeat<T, unlimited> +{ + static result<region, none_t> + invoke(location& loc) + { + region retval(loc); + while(true) + { + auto rslt = T::invoke(loc); + if(rslt.is_err()) + { + return ok(std::move(retval)); + } + retval += rslt.unwrap(); + } + } +}; + +} // detail +} // toml +#endif// TOML11_COMBINATOR_HPP diff --git a/src/toml11/toml/comments.hpp b/src/toml11/toml/comments.hpp new file mode 100644 index 000000000..ec2504117 --- /dev/null +++ b/src/toml11/toml/comments.hpp @@ -0,0 +1,472 @@ +// Copyright Toru Niina 2019. +// Distributed under the MIT License. +#ifndef TOML11_COMMENTS_HPP +#define TOML11_COMMENTS_HPP +#include <initializer_list> +#include <iterator> +#include <stdexcept> +#include <string> +#include <type_traits> +#include <utility> +#include <vector> + +#ifdef TOML11_PRESERVE_COMMENTS_BY_DEFAULT +# define TOML11_DEFAULT_COMMENT_STRATEGY ::toml::preserve_comments +#else +# define TOML11_DEFAULT_COMMENT_STRATEGY ::toml::discard_comments +#endif + +// This file provides mainly two classes, `preserve_comments` and `discard_comments`. +// Those two are a container that have the same interface as `std::vector<std::string>` +// but bahaves in the opposite way. `preserve_comments` is just the same as +// `std::vector<std::string>` and each `std::string` corresponds to a comment line. +// Conversely, `discard_comments` discards all the strings and ignores everything +// assigned in it. `discard_comments` is always empty and you will encounter an +// error whenever you access to the element. +namespace toml +{ +struct discard_comments; // forward decl + +// use it in the following way +// +// const toml::basic_value<toml::preserve_comments> data = +// toml::parse<toml::preserve_comments>("example.toml"); +// +// the interface is almost the same as std::vector<std::string>. +struct preserve_comments +{ + // `container_type` is not provided in discard_comments. + // do not use this inner-type in a generic code. + using container_type = std::vector<std::string>; + + using size_type = container_type::size_type; + using difference_type = container_type::difference_type; + using value_type = container_type::value_type; + using reference = container_type::reference; + using const_reference = container_type::const_reference; + using pointer = container_type::pointer; + using const_pointer = container_type::const_pointer; + using iterator = container_type::iterator; + using const_iterator = container_type::const_iterator; + using reverse_iterator = container_type::reverse_iterator; + using const_reverse_iterator = container_type::const_reverse_iterator; + + preserve_comments() = default; + ~preserve_comments() = default; + preserve_comments(preserve_comments const&) = default; + preserve_comments(preserve_comments &&) = default; + preserve_comments& operator=(preserve_comments const&) = default; + preserve_comments& operator=(preserve_comments &&) = default; + + explicit preserve_comments(const std::vector<std::string>& c): comments(c){} + explicit preserve_comments(std::vector<std::string>&& c) + : comments(std::move(c)) + {} + preserve_comments& operator=(const std::vector<std::string>& c) + { + comments = c; + return *this; + } + preserve_comments& operator=(std::vector<std::string>&& c) + { + comments = std::move(c); + return *this; + } + + explicit preserve_comments(const discard_comments&) {} + + explicit preserve_comments(size_type n): comments(n) {} + preserve_comments(size_type n, const std::string& x): comments(n, x) {} + preserve_comments(std::initializer_list<std::string> x): comments(x) {} + template<typename InputIterator> + preserve_comments(InputIterator first, InputIterator last) + : comments(first, last) + {} + + template<typename InputIterator> + void assign(InputIterator first, InputIterator last) {comments.assign(first, last);} + void assign(std::initializer_list<std::string> ini) {comments.assign(ini);} + void assign(size_type n, const std::string& val) {comments.assign(n, val);} + + // Related to the issue #97. + // + // It is known that `std::vector::insert` and `std::vector::erase` in + // the standard library implementation included in GCC 4.8.5 takes + // `std::vector::iterator` instead of `std::vector::const_iterator`. + // Because of the const-correctness, we cannot convert a `const_iterator` to + // an `iterator`. It causes compilation error in GCC 4.8.5. +#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) && !defined(__clang__) +# if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) <= 40805 +# define TOML11_WORKAROUND_GCC_4_8_X_STANDARD_LIBRARY_IMPLEMENTATION +# endif +#endif + +#ifdef TOML11_WORKAROUND_GCC_4_8_X_STANDARD_LIBRARY_IMPLEMENTATION + iterator insert(iterator p, const std::string& x) + { + return comments.insert(p, x); + } + iterator insert(iterator p, std::string&& x) + { + return comments.insert(p, std::move(x)); + } + void insert(iterator p, size_type n, const std::string& x) + { + return comments.insert(p, n, x); + } + template<typename InputIterator> + void insert(iterator p, InputIterator first, InputIterator last) + { + return comments.insert(p, first, last); + } + void insert(iterator p, std::initializer_list<std::string> ini) + { + return comments.insert(p, ini); + } + + template<typename ... Ts> + iterator emplace(iterator p, Ts&& ... args) + { + return comments.emplace(p, std::forward<Ts>(args)...); + } + + iterator erase(iterator pos) {return comments.erase(pos);} + iterator erase(iterator first, iterator last) + { + return comments.erase(first, last); + } +#else + iterator insert(const_iterator p, const std::string& x) + { + return comments.insert(p, x); + } + iterator insert(const_iterator p, std::string&& x) + { + return comments.insert(p, std::move(x)); + } + iterator insert(const_iterator p, size_type n, const std::string& x) + { + return comments.insert(p, n, x); + } + template<typename InputIterator> + iterator insert(const_iterator p, InputIterator first, InputIterator last) + { + return comments.insert(p, first, last); + } + iterator insert(const_iterator p, std::initializer_list<std::string> ini) + { + return comments.insert(p, ini); + } + + template<typename ... Ts> + iterator emplace(const_iterator p, Ts&& ... args) + { + return comments.emplace(p, std::forward<Ts>(args)...); + } + + iterator erase(const_iterator pos) {return comments.erase(pos);} + iterator erase(const_iterator first, const_iterator last) + { + return comments.erase(first, last); + } +#endif + + void swap(preserve_comments& other) {comments.swap(other.comments);} + + void push_back(const std::string& v) {comments.push_back(v);} + void push_back(std::string&& v) {comments.push_back(std::move(v));} + void pop_back() {comments.pop_back();} + + template<typename ... Ts> + void emplace_back(Ts&& ... args) {comments.emplace_back(std::forward<Ts>(args)...);} + + void clear() {comments.clear();} + + size_type size() const noexcept {return comments.size();} + size_type max_size() const noexcept {return comments.max_size();} + size_type capacity() const noexcept {return comments.capacity();} + bool empty() const noexcept {return comments.empty();} + + void reserve(size_type n) {comments.reserve(n);} + void resize(size_type n) {comments.resize(n);} + void resize(size_type n, const std::string& c) {comments.resize(n, c);} + void shrink_to_fit() {comments.shrink_to_fit();} + + reference operator[](const size_type n) noexcept {return comments[n];} + const_reference operator[](const size_type n) const noexcept {return comments[n];} + reference at(const size_type n) {return comments.at(n);} + const_reference at(const size_type n) const {return comments.at(n);} + reference front() noexcept {return comments.front();} + const_reference front() const noexcept {return comments.front();} + reference back() noexcept {return comments.back();} + const_reference back() const noexcept {return comments.back();} + + pointer data() noexcept {return comments.data();} + const_pointer data() const noexcept {return comments.data();} + + iterator begin() noexcept {return comments.begin();} + iterator end() noexcept {return comments.end();} + const_iterator begin() const noexcept {return comments.begin();} + const_iterator end() const noexcept {return comments.end();} + const_iterator cbegin() const noexcept {return comments.cbegin();} + const_iterator cend() const noexcept {return comments.cend();} + + reverse_iterator rbegin() noexcept {return comments.rbegin();} + reverse_iterator rend() noexcept {return comments.rend();} + const_reverse_iterator rbegin() const noexcept {return comments.rbegin();} + const_reverse_iterator rend() const noexcept {return comments.rend();} + const_reverse_iterator crbegin() const noexcept {return comments.crbegin();} + const_reverse_iterator crend() const noexcept {return comments.crend();} + + friend bool operator==(const preserve_comments&, const preserve_comments&); + friend bool operator!=(const preserve_comments&, const preserve_comments&); + friend bool operator< (const preserve_comments&, const preserve_comments&); + friend bool operator<=(const preserve_comments&, const preserve_comments&); + friend bool operator> (const preserve_comments&, const preserve_comments&); + friend bool operator>=(const preserve_comments&, const preserve_comments&); + + friend void swap(preserve_comments&, std::vector<std::string>&); + friend void swap(std::vector<std::string>&, preserve_comments&); + + private: + + container_type comments; +}; + +inline bool operator==(const preserve_comments& lhs, const preserve_comments& rhs) {return lhs.comments == rhs.comments;} +inline bool operator!=(const preserve_comments& lhs, const preserve_comments& rhs) {return lhs.comments != rhs.comments;} +inline bool operator< (const preserve_comments& lhs, const preserve_comments& rhs) {return lhs.comments < rhs.comments;} +inline bool operator<=(const preserve_comments& lhs, const preserve_comments& rhs) {return lhs.comments <= rhs.comments;} +inline bool operator> (const preserve_comments& lhs, const preserve_comments& rhs) {return lhs.comments > rhs.comments;} +inline bool operator>=(const preserve_comments& lhs, const preserve_comments& rhs) {return lhs.comments >= rhs.comments;} + +inline void swap(preserve_comments& lhs, preserve_comments& rhs) +{ + lhs.swap(rhs); + return; +} +inline void swap(preserve_comments& lhs, std::vector<std::string>& rhs) +{ + lhs.comments.swap(rhs); + return; +} +inline void swap(std::vector<std::string>& lhs, preserve_comments& rhs) +{ + lhs.swap(rhs.comments); + return; +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const preserve_comments& com) +{ + for(const auto& c : com) + { + os << '#' << c << '\n'; + } + return os; +} + +namespace detail +{ + +// To provide the same interface with `preserve_comments`, `discard_comments` +// should have an iterator. But it does not contain anything, so we need to +// add an iterator that points nothing. +// +// It always points null, so DO NOT unwrap this iterator. It always crashes +// your program. +template<typename T, bool is_const> +struct empty_iterator +{ + using value_type = T; + using reference_type = typename std::conditional<is_const, T const&, T&>::type; + using pointer_type = typename std::conditional<is_const, T const*, T*>::type; + using difference_type = std::ptrdiff_t; + using iterator_category = std::random_access_iterator_tag; + + empty_iterator() = default; + ~empty_iterator() = default; + empty_iterator(empty_iterator const&) = default; + empty_iterator(empty_iterator &&) = default; + empty_iterator& operator=(empty_iterator const&) = default; + empty_iterator& operator=(empty_iterator &&) = default; + + // DO NOT call these operators. + reference_type operator*() const noexcept {std::terminate();} + pointer_type operator->() const noexcept {return nullptr;} + reference_type operator[](difference_type) const noexcept {return this->operator*();} + + // These operators do nothing. + empty_iterator& operator++() noexcept {return *this;} + empty_iterator operator++(int) noexcept {return *this;} + empty_iterator& operator--() noexcept {return *this;} + empty_iterator operator--(int) noexcept {return *this;} + + empty_iterator& operator+=(difference_type) noexcept {return *this;} + empty_iterator& operator-=(difference_type) noexcept {return *this;} + + empty_iterator operator+(difference_type) const noexcept {return *this;} + empty_iterator operator-(difference_type) const noexcept {return *this;} +}; + +template<typename T, bool C> +bool operator==(const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return true;} +template<typename T, bool C> +bool operator!=(const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return false;} +template<typename T, bool C> +bool operator< (const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return false;} +template<typename T, bool C> +bool operator<=(const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return true;} +template<typename T, bool C> +bool operator> (const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return false;} +template<typename T, bool C> +bool operator>=(const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return true;} + +template<typename T, bool C> +typename empty_iterator<T, C>::difference_type +operator-(const empty_iterator<T, C>&, const empty_iterator<T, C>&) noexcept {return 0;} + +template<typename T, bool C> +empty_iterator<T, C> +operator+(typename empty_iterator<T, C>::difference_type, const empty_iterator<T, C>& rhs) noexcept {return rhs;} +template<typename T, bool C> +empty_iterator<T, C> +operator+(const empty_iterator<T, C>& lhs, typename empty_iterator<T, C>::difference_type) noexcept {return lhs;} + +} // detail + +// The default comment type. It discards all the comments. It requires only one +// byte to contain, so the memory footprint is smaller than preserve_comments. +// +// It just ignores `push_back`, `insert`, `erase`, and any other modifications. +// IT always returns size() == 0, the iterator taken by `begin()` is always the +// same as that of `end()`, and accessing through `operator[]` or iterators +// always causes a segmentation fault. DO NOT access to the element of this. +// +// Why this is chose as the default type is because the last version (2.x.y) +// does not contain any comments in a value. To minimize the impact on the +// efficiency, this is chosen as a default. +// +// To reduce the memory footprint, later we can try empty base optimization (EBO). +struct discard_comments +{ + using size_type = std::size_t; + using difference_type = std::ptrdiff_t; + using value_type = std::string; + using reference = std::string&; + using const_reference = std::string const&; + using pointer = std::string*; + using const_pointer = std::string const*; + using iterator = detail::empty_iterator<std::string, false>; + using const_iterator = detail::empty_iterator<std::string, true>; + using reverse_iterator = detail::empty_iterator<std::string, false>; + using const_reverse_iterator = detail::empty_iterator<std::string, true>; + + discard_comments() = default; + ~discard_comments() = default; + discard_comments(discard_comments const&) = default; + discard_comments(discard_comments &&) = default; + discard_comments& operator=(discard_comments const&) = default; + discard_comments& operator=(discard_comments &&) = default; + + explicit discard_comments(const std::vector<std::string>&) noexcept {} + explicit discard_comments(std::vector<std::string>&&) noexcept {} + discard_comments& operator=(const std::vector<std::string>&) noexcept {return *this;} + discard_comments& operator=(std::vector<std::string>&&) noexcept {return *this;} + + explicit discard_comments(const preserve_comments&) noexcept {} + + explicit discard_comments(size_type) noexcept {} + discard_comments(size_type, const std::string&) noexcept {} + discard_comments(std::initializer_list<std::string>) noexcept {} + template<typename InputIterator> + discard_comments(InputIterator, InputIterator) noexcept {} + + template<typename InputIterator> + void assign(InputIterator, InputIterator) noexcept {} + void assign(std::initializer_list<std::string>) noexcept {} + void assign(size_type, const std::string&) noexcept {} + + iterator insert(const_iterator, const std::string&) {return iterator{};} + iterator insert(const_iterator, std::string&&) {return iterator{};} + iterator insert(const_iterator, size_type, const std::string&) {return iterator{};} + template<typename InputIterator> + iterator insert(const_iterator, InputIterator, InputIterator) {return iterator{};} + iterator insert(const_iterator, std::initializer_list<std::string>) {return iterator{};} + + template<typename ... Ts> + iterator emplace(const_iterator, Ts&& ...) {return iterator{};} + iterator erase(const_iterator) {return iterator{};} + iterator erase(const_iterator, const_iterator) {return iterator{};} + + void swap(discard_comments&) {return;} + + void push_back(const std::string&) {return;} + void push_back(std::string&& ) {return;} + void pop_back() {return;} + + template<typename ... Ts> + void emplace_back(Ts&& ...) {return;} + + void clear() {return;} + + size_type size() const noexcept {return 0;} + size_type max_size() const noexcept {return 0;} + size_type capacity() const noexcept {return 0;} + bool empty() const noexcept {return true;} + + void reserve(size_type) {return;} + void resize(size_type) {return;} + void resize(size_type, const std::string&) {return;} + void shrink_to_fit() {return;} + + // DO NOT access to the element of this container. This container is always + // empty, so accessing through operator[], front/back, data causes address + // error. + + reference operator[](const size_type) noexcept {return *data();} + const_reference operator[](const size_type) const noexcept {return *data();} + reference at(const size_type) {throw std::out_of_range("toml::discard_comment is always empty.");} + const_reference at(const size_type) const {throw std::out_of_range("toml::discard_comment is always empty.");} + reference front() noexcept {return *data();} + const_reference front() const noexcept {return *data();} + reference back() noexcept {return *data();} + const_reference back() const noexcept {return *data();} + + pointer data() noexcept {return nullptr;} + const_pointer data() const noexcept {return nullptr;} + + iterator begin() noexcept {return iterator{};} + iterator end() noexcept {return iterator{};} + const_iterator begin() const noexcept {return const_iterator{};} + const_iterator end() const noexcept {return const_iterator{};} + const_iterator cbegin() const noexcept {return const_iterator{};} + const_iterator cend() const noexcept {return const_iterator{};} + + reverse_iterator rbegin() noexcept {return iterator{};} + reverse_iterator rend() noexcept {return iterator{};} + const_reverse_iterator rbegin() const noexcept {return const_iterator{};} + const_reverse_iterator rend() const noexcept {return const_iterator{};} + const_reverse_iterator crbegin() const noexcept {return const_iterator{};} + const_reverse_iterator crend() const noexcept {return const_iterator{};} +}; + +inline bool operator==(const discard_comments&, const discard_comments&) noexcept {return true;} +inline bool operator!=(const discard_comments&, const discard_comments&) noexcept {return false;} +inline bool operator< (const discard_comments&, const discard_comments&) noexcept {return false;} +inline bool operator<=(const discard_comments&, const discard_comments&) noexcept {return true;} +inline bool operator> (const discard_comments&, const discard_comments&) noexcept {return false;} +inline bool operator>=(const discard_comments&, const discard_comments&) noexcept {return true;} + +inline void swap(const discard_comments&, const discard_comments&) noexcept {return;} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const discard_comments&) +{ + return os; +} + +} // toml11 +#endif// TOML11_COMMENTS_HPP diff --git a/src/toml11/toml/datetime.hpp b/src/toml11/toml/datetime.hpp new file mode 100644 index 000000000..d8127c150 --- /dev/null +++ b/src/toml11/toml/datetime.hpp @@ -0,0 +1,631 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_DATETIME_HPP +#define TOML11_DATETIME_HPP +#include <cstdint> +#include <cstdlib> +#include <ctime> + +#include <array> +#include <chrono> +#include <iomanip> +#include <ostream> +#include <tuple> + +namespace toml +{ + +// To avoid non-threadsafe std::localtime. In C11 (not C++11!), localtime_s is +// provided in the absolutely same purpose, but C++11 is actually not compatible +// with C11. We need to dispatch the function depending on the OS. +namespace detail +{ +// TODO: find more sophisticated way to handle this +#if (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 1) || defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_POSIX_SOURCE) +inline std::tm localtime_s(const std::time_t* src) +{ + std::tm dst; + const auto result = ::localtime_r(src, &dst); + if (!result) { throw std::runtime_error("localtime_r failed."); } + return dst; +} +inline std::tm gmtime_s(const std::time_t* src) +{ + std::tm dst; + const auto result = ::gmtime_r(src, &dst); + if (!result) { throw std::runtime_error("gmtime_r failed."); } + return dst; +} +#elif defined(_MSC_VER) +inline std::tm localtime_s(const std::time_t* src) +{ + std::tm dst; + const auto result = ::localtime_s(&dst, src); + if (result) { throw std::runtime_error("localtime_s failed."); } + return dst; +} +inline std::tm gmtime_s(const std::time_t* src) +{ + std::tm dst; + const auto result = ::gmtime_s(&dst, src); + if (result) { throw std::runtime_error("gmtime_s failed."); } + return dst; +} +#else // fallback. not threadsafe +inline std::tm localtime_s(const std::time_t* src) +{ + const auto result = std::localtime(src); + if (!result) { throw std::runtime_error("localtime failed."); } + return *result; +} +inline std::tm gmtime_s(const std::time_t* src) +{ + const auto result = std::gmtime(src); + if (!result) { throw std::runtime_error("gmtime failed."); } + return *result; +} +#endif +} // detail + +enum class month_t : std::uint8_t +{ + Jan = 0, + Feb = 1, + Mar = 2, + Apr = 3, + May = 4, + Jun = 5, + Jul = 6, + Aug = 7, + Sep = 8, + Oct = 9, + Nov = 10, + Dec = 11 +}; + +struct local_date +{ + std::int16_t year; // A.D. (like, 2018) + std::uint8_t month; // [0, 11] + std::uint8_t day; // [1, 31] + + local_date(int y, month_t m, int d) + : year (static_cast<std::int16_t>(y)), + month(static_cast<std::uint8_t>(m)), + day (static_cast<std::uint8_t>(d)) + {} + + explicit local_date(const std::tm& t) + : year (static_cast<std::int16_t>(t.tm_year + 1900)), + month(static_cast<std::uint8_t>(t.tm_mon)), + day (static_cast<std::uint8_t>(t.tm_mday)) + {} + + explicit local_date(const std::chrono::system_clock::time_point& tp) + { + const auto t = std::chrono::system_clock::to_time_t(tp); + const auto time = detail::localtime_s(&t); + *this = local_date(time); + } + + explicit local_date(const std::time_t t) + : local_date(std::chrono::system_clock::from_time_t(t)) + {} + + operator std::chrono::system_clock::time_point() const + { + // std::mktime returns date as local time zone. no conversion needed + std::tm t; + t.tm_sec = 0; + t.tm_min = 0; + t.tm_hour = 0; + t.tm_mday = static_cast<int>(this->day); + t.tm_mon = static_cast<int>(this->month); + t.tm_year = static_cast<int>(this->year) - 1900; + t.tm_wday = 0; // the value will be ignored + t.tm_yday = 0; // the value will be ignored + t.tm_isdst = -1; + return std::chrono::system_clock::from_time_t(std::mktime(&t)); + } + + operator std::time_t() const + { + return std::chrono::system_clock::to_time_t( + std::chrono::system_clock::time_point(*this)); + } + + local_date() = default; + ~local_date() = default; + local_date(local_date const&) = default; + local_date(local_date&&) = default; + local_date& operator=(local_date const&) = default; + local_date& operator=(local_date&&) = default; +}; + +inline bool operator==(const local_date& lhs, const local_date& rhs) +{ + return std::make_tuple(lhs.year, lhs.month, lhs.day) == + std::make_tuple(rhs.year, rhs.month, rhs.day); +} +inline bool operator!=(const local_date& lhs, const local_date& rhs) +{ + return !(lhs == rhs); +} +inline bool operator< (const local_date& lhs, const local_date& rhs) +{ + return std::make_tuple(lhs.year, lhs.month, lhs.day) < + std::make_tuple(rhs.year, rhs.month, rhs.day); +} +inline bool operator<=(const local_date& lhs, const local_date& rhs) +{ + return (lhs < rhs) || (lhs == rhs); +} +inline bool operator> (const local_date& lhs, const local_date& rhs) +{ + return !(lhs <= rhs); +} +inline bool operator>=(const local_date& lhs, const local_date& rhs) +{ + return !(lhs < rhs); +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const local_date& date) +{ + os << std::setfill('0') << std::setw(4) << static_cast<int>(date.year ) << '-'; + os << std::setfill('0') << std::setw(2) << static_cast<int>(date.month) + 1 << '-'; + os << std::setfill('0') << std::setw(2) << static_cast<int>(date.day ) ; + return os; +} + +struct local_time +{ + std::uint8_t hour; // [0, 23] + std::uint8_t minute; // [0, 59] + std::uint8_t second; // [0, 60] + std::uint16_t millisecond; // [0, 999] + std::uint16_t microsecond; // [0, 999] + std::uint16_t nanosecond; // [0, 999] + + local_time(int h, int m, int s, + int ms = 0, int us = 0, int ns = 0) + : hour (static_cast<std::uint8_t>(h)), + minute(static_cast<std::uint8_t>(m)), + second(static_cast<std::uint8_t>(s)), + millisecond(static_cast<std::uint16_t>(ms)), + microsecond(static_cast<std::uint16_t>(us)), + nanosecond (static_cast<std::uint16_t>(ns)) + {} + + explicit local_time(const std::tm& t) + : hour (static_cast<std::uint8_t>(t.tm_hour)), + minute(static_cast<std::uint8_t>(t.tm_min)), + second(static_cast<std::uint8_t>(t.tm_sec)), + millisecond(0), microsecond(0), nanosecond(0) + {} + + template<typename Rep, typename Period> + explicit local_time(const std::chrono::duration<Rep, Period>& t) + { + const auto h = std::chrono::duration_cast<std::chrono::hours>(t); + this->hour = static_cast<std::uint8_t>(h.count()); + const auto t2 = t - h; + const auto m = std::chrono::duration_cast<std::chrono::minutes>(t2); + this->minute = static_cast<std::uint8_t>(m.count()); + const auto t3 = t2 - m; + const auto s = std::chrono::duration_cast<std::chrono::seconds>(t3); + this->second = static_cast<std::uint8_t>(s.count()); + const auto t4 = t3 - s; + const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(t4); + this->millisecond = static_cast<std::uint16_t>(ms.count()); + const auto t5 = t4 - ms; + const auto us = std::chrono::duration_cast<std::chrono::microseconds>(t5); + this->microsecond = static_cast<std::uint16_t>(us.count()); + const auto t6 = t5 - us; + const auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(t6); + this->nanosecond = static_cast<std::uint16_t>(ns.count()); + } + + operator std::chrono::nanoseconds() const + { + return std::chrono::nanoseconds (this->nanosecond) + + std::chrono::microseconds(this->microsecond) + + std::chrono::milliseconds(this->millisecond) + + std::chrono::seconds(this->second) + + std::chrono::minutes(this->minute) + + std::chrono::hours(this->hour); + } + + local_time() = default; + ~local_time() = default; + local_time(local_time const&) = default; + local_time(local_time&&) = default; + local_time& operator=(local_time const&) = default; + local_time& operator=(local_time&&) = default; +}; + +inline bool operator==(const local_time& lhs, const local_time& rhs) +{ + return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) == + std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond); +} +inline bool operator!=(const local_time& lhs, const local_time& rhs) +{ + return !(lhs == rhs); +} +inline bool operator< (const local_time& lhs, const local_time& rhs) +{ + return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) < + std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond); +} +inline bool operator<=(const local_time& lhs, const local_time& rhs) +{ + return (lhs < rhs) || (lhs == rhs); +} +inline bool operator> (const local_time& lhs, const local_time& rhs) +{ + return !(lhs <= rhs); +} +inline bool operator>=(const local_time& lhs, const local_time& rhs) +{ + return !(lhs < rhs); +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const local_time& time) +{ + os << std::setfill('0') << std::setw(2) << static_cast<int>(time.hour ) << ':'; + os << std::setfill('0') << std::setw(2) << static_cast<int>(time.minute) << ':'; + os << std::setfill('0') << std::setw(2) << static_cast<int>(time.second); + if(time.millisecond != 0 || time.microsecond != 0 || time.nanosecond != 0) + { + os << '.'; + os << std::setfill('0') << std::setw(3) << static_cast<int>(time.millisecond); + if(time.microsecond != 0 || time.nanosecond != 0) + { + os << std::setfill('0') << std::setw(3) << static_cast<int>(time.microsecond); + if(time.nanosecond != 0) + { + os << std::setfill('0') << std::setw(3) << static_cast<int>(time.nanosecond); + } + } + } + return os; +} + +struct time_offset +{ + std::int8_t hour; // [-12, 12] + std::int8_t minute; // [-59, 59] + + time_offset(int h, int m) + : hour (static_cast<std::int8_t>(h)), + minute(static_cast<std::int8_t>(m)) + {} + + operator std::chrono::minutes() const + { + return std::chrono::minutes(this->minute) + + std::chrono::hours(this->hour); + } + + time_offset() = default; + ~time_offset() = default; + time_offset(time_offset const&) = default; + time_offset(time_offset&&) = default; + time_offset& operator=(time_offset const&) = default; + time_offset& operator=(time_offset&&) = default; +}; + +inline bool operator==(const time_offset& lhs, const time_offset& rhs) +{ + return std::make_tuple(lhs.hour, lhs.minute) == + std::make_tuple(rhs.hour, rhs.minute); +} +inline bool operator!=(const time_offset& lhs, const time_offset& rhs) +{ + return !(lhs == rhs); +} +inline bool operator< (const time_offset& lhs, const time_offset& rhs) +{ + return std::make_tuple(lhs.hour, lhs.minute) < + std::make_tuple(rhs.hour, rhs.minute); +} +inline bool operator<=(const time_offset& lhs, const time_offset& rhs) +{ + return (lhs < rhs) || (lhs == rhs); +} +inline bool operator> (const time_offset& lhs, const time_offset& rhs) +{ + return !(lhs <= rhs); +} +inline bool operator>=(const time_offset& lhs, const time_offset& rhs) +{ + return !(lhs < rhs); +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const time_offset& offset) +{ + if(offset.hour == 0 && offset.minute == 0) + { + os << 'Z'; + return os; + } + int minute = static_cast<int>(offset.hour) * 60 + offset.minute; + if(minute < 0){os << '-'; minute = std::abs(minute);} else {os << '+';} + os << std::setfill('0') << std::setw(2) << minute / 60 << ':'; + os << std::setfill('0') << std::setw(2) << minute % 60; + return os; +} + +struct local_datetime +{ + local_date date; + local_time time; + + local_datetime(local_date d, local_time t): date(d), time(t) {} + + explicit local_datetime(const std::tm& t): date(t), time(t){} + + explicit local_datetime(const std::chrono::system_clock::time_point& tp) + { + const auto t = std::chrono::system_clock::to_time_t(tp); + std::tm ltime = detail::localtime_s(&t); + + this->date = local_date(ltime); + this->time = local_time(ltime); + + // std::tm lacks subsecond information, so diff between tp and tm + // can be used to get millisecond & microsecond information. + const auto t_diff = tp - + std::chrono::system_clock::from_time_t(std::mktime(<ime)); + this->time.millisecond = static_cast<std::uint16_t>( + std::chrono::duration_cast<std::chrono::milliseconds>(t_diff).count()); + this->time.microsecond = static_cast<std::uint16_t>( + std::chrono::duration_cast<std::chrono::microseconds>(t_diff).count()); + this->time.nanosecond = static_cast<std::uint16_t>( + std::chrono::duration_cast<std::chrono::nanoseconds >(t_diff).count()); + } + + explicit local_datetime(const std::time_t t) + : local_datetime(std::chrono::system_clock::from_time_t(t)) + {} + + operator std::chrono::system_clock::time_point() const + { + using internal_duration = + typename std::chrono::system_clock::time_point::duration; + + // Normally DST begins at A.M. 3 or 4. If we re-use conversion operator + // of local_date and local_time independently, the conversion fails if + // it is the day when DST begins or ends. Since local_date considers the + // time is 00:00 A.M. and local_time does not consider DST because it + // does not have any date information. We need to consider both date and + // time information at the same time to convert it correctly. + + std::tm t; + t.tm_sec = static_cast<int>(this->time.second); + t.tm_min = static_cast<int>(this->time.minute); + t.tm_hour = static_cast<int>(this->time.hour); + t.tm_mday = static_cast<int>(this->date.day); + t.tm_mon = static_cast<int>(this->date.month); + t.tm_year = static_cast<int>(this->date.year) - 1900; + t.tm_wday = 0; // the value will be ignored + t.tm_yday = 0; // the value will be ignored + t.tm_isdst = -1; + + // std::mktime returns date as local time zone. no conversion needed + auto dt = std::chrono::system_clock::from_time_t(std::mktime(&t)); + dt += std::chrono::duration_cast<internal_duration>( + std::chrono::milliseconds(this->time.millisecond) + + std::chrono::microseconds(this->time.microsecond) + + std::chrono::nanoseconds (this->time.nanosecond)); + return dt; + } + + operator std::time_t() const + { + return std::chrono::system_clock::to_time_t( + std::chrono::system_clock::time_point(*this)); + } + + local_datetime() = default; + ~local_datetime() = default; + local_datetime(local_datetime const&) = default; + local_datetime(local_datetime&&) = default; + local_datetime& operator=(local_datetime const&) = default; + local_datetime& operator=(local_datetime&&) = default; +}; + +inline bool operator==(const local_datetime& lhs, const local_datetime& rhs) +{ + return std::make_tuple(lhs.date, lhs.time) == + std::make_tuple(rhs.date, rhs.time); +} +inline bool operator!=(const local_datetime& lhs, const local_datetime& rhs) +{ + return !(lhs == rhs); +} +inline bool operator< (const local_datetime& lhs, const local_datetime& rhs) +{ + return std::make_tuple(lhs.date, lhs.time) < + std::make_tuple(rhs.date, rhs.time); +} +inline bool operator<=(const local_datetime& lhs, const local_datetime& rhs) +{ + return (lhs < rhs) || (lhs == rhs); +} +inline bool operator> (const local_datetime& lhs, const local_datetime& rhs) +{ + return !(lhs <= rhs); +} +inline bool operator>=(const local_datetime& lhs, const local_datetime& rhs) +{ + return !(lhs < rhs); +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const local_datetime& dt) +{ + os << dt.date << 'T' << dt.time; + return os; +} + +struct offset_datetime +{ + local_date date; + local_time time; + time_offset offset; + + offset_datetime(local_date d, local_time t, time_offset o) + : date(d), time(t), offset(o) + {} + offset_datetime(const local_datetime& dt, time_offset o) + : date(dt.date), time(dt.time), offset(o) + {} + explicit offset_datetime(const local_datetime& ld) + : date(ld.date), time(ld.time), offset(get_local_offset(nullptr)) + // use the current local timezone offset + {} + explicit offset_datetime(const std::chrono::system_clock::time_point& tp) + : offset(0, 0) // use gmtime + { + const auto timet = std::chrono::system_clock::to_time_t(tp); + const auto tm = detail::gmtime_s(&timet); + this->date = local_date(tm); + this->time = local_time(tm); + } + explicit offset_datetime(const std::time_t& t) + : offset(0, 0) // use gmtime + { + const auto tm = detail::gmtime_s(&t); + this->date = local_date(tm); + this->time = local_time(tm); + } + explicit offset_datetime(const std::tm& t) + : offset(0, 0) // assume gmtime + { + this->date = local_date(t); + this->time = local_time(t); + } + + operator std::chrono::system_clock::time_point() const + { + // get date-time + using internal_duration = + typename std::chrono::system_clock::time_point::duration; + + // first, convert it to local date-time information in the same way as + // local_datetime does. later we will use time_t to adjust time offset. + std::tm t; + t.tm_sec = static_cast<int>(this->time.second); + t.tm_min = static_cast<int>(this->time.minute); + t.tm_hour = static_cast<int>(this->time.hour); + t.tm_mday = static_cast<int>(this->date.day); + t.tm_mon = static_cast<int>(this->date.month); + t.tm_year = static_cast<int>(this->date.year) - 1900; + t.tm_wday = 0; // the value will be ignored + t.tm_yday = 0; // the value will be ignored + t.tm_isdst = -1; + const std::time_t tp_loc = std::mktime(std::addressof(t)); + + auto tp = std::chrono::system_clock::from_time_t(tp_loc); + tp += std::chrono::duration_cast<internal_duration>( + std::chrono::milliseconds(this->time.millisecond) + + std::chrono::microseconds(this->time.microsecond) + + std::chrono::nanoseconds (this->time.nanosecond)); + + // Since mktime uses local time zone, it should be corrected. + // `12:00:00+09:00` means `03:00:00Z`. So mktime returns `03:00:00Z` if + // we are in `+09:00` timezone. To represent `12:00:00Z` there, we need + // to add `+09:00` to `03:00:00Z`. + // Here, it uses the time_t converted from date-time info to handle + // daylight saving time. + const auto ofs = get_local_offset(std::addressof(tp_loc)); + tp += std::chrono::hours (ofs.hour); + tp += std::chrono::minutes(ofs.minute); + + // We got `12:00:00Z` by correcting local timezone applied by mktime. + // Then we will apply the offset. Let's say `12:00:00-08:00` is given. + // And now, we have `12:00:00Z`. `12:00:00-08:00` means `20:00:00Z`. + // So we need to subtract the offset. + tp -= std::chrono::minutes(this->offset); + return tp; + } + + operator std::time_t() const + { + return std::chrono::system_clock::to_time_t( + std::chrono::system_clock::time_point(*this)); + } + + offset_datetime() = default; + ~offset_datetime() = default; + offset_datetime(offset_datetime const&) = default; + offset_datetime(offset_datetime&&) = default; + offset_datetime& operator=(offset_datetime const&) = default; + offset_datetime& operator=(offset_datetime&&) = default; + + private: + + static time_offset get_local_offset(const std::time_t* tp) + { + // get local timezone with the same date-time information as mktime + const auto t = detail::localtime_s(tp); + + std::array<char, 6> buf; + const auto result = std::strftime(buf.data(), 6, "%z", &t); // +hhmm\0 + if(result != 5) + { + throw std::runtime_error("toml::offset_datetime: cannot obtain " + "timezone information of current env"); + } + const int ofs = std::atoi(buf.data()); + const int ofs_h = ofs / 100; + const int ofs_m = ofs - (ofs_h * 100); + return time_offset(ofs_h, ofs_m); + } +}; + +inline bool operator==(const offset_datetime& lhs, const offset_datetime& rhs) +{ + return std::make_tuple(lhs.date, lhs.time, lhs.offset) == + std::make_tuple(rhs.date, rhs.time, rhs.offset); +} +inline bool operator!=(const offset_datetime& lhs, const offset_datetime& rhs) +{ + return !(lhs == rhs); +} +inline bool operator< (const offset_datetime& lhs, const offset_datetime& rhs) +{ + return std::make_tuple(lhs.date, lhs.time, lhs.offset) < + std::make_tuple(rhs.date, rhs.time, rhs.offset); +} +inline bool operator<=(const offset_datetime& lhs, const offset_datetime& rhs) +{ + return (lhs < rhs) || (lhs == rhs); +} +inline bool operator> (const offset_datetime& lhs, const offset_datetime& rhs) +{ + return !(lhs <= rhs); +} +inline bool operator>=(const offset_datetime& lhs, const offset_datetime& rhs) +{ + return !(lhs < rhs); +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const offset_datetime& dt) +{ + os << dt.date << 'T' << dt.time << dt.offset; + return os; +} + +}//toml +#endif// TOML11_DATETIME diff --git a/src/toml11/toml/exception.hpp b/src/toml11/toml/exception.hpp new file mode 100644 index 000000000..c64651d0a --- /dev/null +++ b/src/toml11/toml/exception.hpp @@ -0,0 +1,65 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_EXCEPTION_HPP +#define TOML11_EXCEPTION_HPP +#include <stdexcept> +#include <string> + +#include "source_location.hpp" + +namespace toml +{ + +struct exception : public std::exception +{ + public: + explicit exception(const source_location& loc): loc_(loc) {} + virtual ~exception() noexcept override = default; + virtual const char* what() const noexcept override {return "";} + virtual source_location const& location() const noexcept {return loc_;} + + protected: + source_location loc_; +}; + +struct syntax_error : public toml::exception +{ + public: + explicit syntax_error(const std::string& what_arg, const source_location& loc) + : exception(loc), what_(what_arg) + {} + virtual ~syntax_error() noexcept override = default; + virtual const char* what() const noexcept override {return what_.c_str();} + + protected: + std::string what_; +}; + +struct type_error : public toml::exception +{ + public: + explicit type_error(const std::string& what_arg, const source_location& loc) + : exception(loc), what_(what_arg) + {} + virtual ~type_error() noexcept override = default; + virtual const char* what() const noexcept override {return what_.c_str();} + + protected: + std::string what_; +}; + +struct internal_error : public toml::exception +{ + public: + explicit internal_error(const std::string& what_arg, const source_location& loc) + : exception(loc), what_(what_arg) + {} + virtual ~internal_error() noexcept override = default; + virtual const char* what() const noexcept override {return what_.c_str();} + + protected: + std::string what_; +}; + +} // toml +#endif // TOML_EXCEPTION diff --git a/src/toml11/toml/from.hpp b/src/toml11/toml/from.hpp new file mode 100644 index 000000000..10815caf5 --- /dev/null +++ b/src/toml11/toml/from.hpp @@ -0,0 +1,19 @@ +// Copyright Toru Niina 2019. +// Distributed under the MIT License. +#ifndef TOML11_FROM_HPP +#define TOML11_FROM_HPP + +namespace toml +{ + +template<typename T> +struct from; +// { +// static T from_toml(const toml::value& v) +// { +// // User-defined conversions ... +// } +// }; + +} // toml +#endif // TOML11_FROM_HPP diff --git a/src/toml11/toml/get.hpp b/src/toml11/toml/get.hpp new file mode 100644 index 000000000..d7fdf553b --- /dev/null +++ b/src/toml11/toml/get.hpp @@ -0,0 +1,1117 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_GET_HPP +#define TOML11_GET_HPP +#include <algorithm> + +#include "from.hpp" +#include "result.hpp" +#include "value.hpp" + +namespace toml +{ + +// ============================================================================ +// exact toml::* type + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T> & +get(basic_value<C, M, V>& v) +{ + return v.template cast<detail::type_to_enum<T, basic_value<C, M, V>>::value>(); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T> const& +get(const basic_value<C, M, V>& v) +{ + return v.template cast<detail::type_to_enum<T, basic_value<C, M, V>>::value>(); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T> +get(basic_value<C, M, V>&& v) +{ + return T(std::move(v).template cast<detail::type_to_enum<T, basic_value<C, M, V>>::value>()); +} + +// ============================================================================ +// T == toml::value; identity transformation. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, basic_value<C, M, V>>::value, T>& +get(basic_value<C, M, V>& v) +{ + return v; +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, basic_value<C, M, V>>::value, T> const& +get(const basic_value<C, M, V>& v) +{ + return v; +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, basic_value<C, M, V>>::value, T> +get(basic_value<C, M, V>&& v) +{ + return basic_value<C, M, V>(std::move(v)); +} + +// ============================================================================ +// T == toml::basic_value<C2, M2, V2>; basic_value -> basic_value + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<detail::conjunction<detail::is_basic_value<T>, + detail::negation<std::is_same<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>& v) +{ + return T(v); +} + +// ============================================================================ +// integer convertible from toml::Integer + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<detail::conjunction< + std::is_integral<T>, // T is integral + detail::negation<std::is_same<T, bool>>, // but not bool + detail::negation< // but not toml::integer + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>& v) +{ + return static_cast<T>(v.as_integer()); +} + +// ============================================================================ +// floating point convertible from toml::Float + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<detail::conjunction< + std::is_floating_point<T>, // T is floating_point + detail::negation< // but not toml::floating + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>& v) +{ + return static_cast<T>(v.as_floating()); +} + +// ============================================================================ +// std::string; toml uses its own toml::string, but it should be convertible to +// std::string seamlessly + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, std::string>::value, std::string>& +get(basic_value<C, M, V>& v) +{ + return v.as_string().str; +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, std::string>::value, std::string> const& +get(const basic_value<C, M, V>& v) +{ + return v.as_string().str; +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, std::string>::value, std::string> +get(basic_value<C, M, V>&& v) +{ + return std::string(std::move(v.as_string().str)); +} + +// ============================================================================ +// std::string_view + +#if defined(TOML11_USING_STRING_VIEW) && TOML11_USING_STRING_VIEW>0 +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<std::is_same<T, std::string_view>::value, std::string_view> +get(const basic_value<C, M, V>& v) +{ + return std::string_view(v.as_string().str); +} +#endif + +// ============================================================================ +// std::chrono::duration from toml::local_time. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t<detail::is_chrono_duration<T>::value, T> +get(const basic_value<C, M, V>& v) +{ + return std::chrono::duration_cast<T>( + std::chrono::nanoseconds(v.as_local_time())); +} + +// ============================================================================ +// std::chrono::system_clock::time_point from toml::datetime variants + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +inline detail::enable_if_t< + std::is_same<std::chrono::system_clock::time_point, T>::value, T> +get(const basic_value<C, M, V>& v) +{ + switch(v.type()) + { + case value_t::local_date: + { + return std::chrono::system_clock::time_point(v.as_local_date()); + } + case value_t::local_datetime: + { + return std::chrono::system_clock::time_point(v.as_local_datetime()); + } + case value_t::offset_datetime: + { + return std::chrono::system_clock::time_point(v.as_offset_datetime()); + } + default: + { + throw type_error(detail::format_underline("toml::value: " + "bad_cast to std::chrono::system_clock::time_point", { + {v.location(), concat_to_string("the actual type is ", v.type())} + }), v.location()); + } + } +} + +// ============================================================================ +// forward declaration to use this recursively. ignore this and go ahead. + +// array-like type with push_back(value) method +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::is_container<T>, // T is a container + detail::has_push_back_method<T>, // T::push_back(value) works + detail::negation< // but not toml::array + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>&); + +// array-like type without push_back(value) method +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::is_container<T>, // T is a container + detail::negation<detail::has_push_back_method<T>>, // w/o push_back(...) + detail::negation< // not toml::array + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>&); + +// std::pair<T1, T2> +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_std_pair<T>::value, T> +get(const basic_value<C, M, V>&); + +// std::tuple<T1, T2, ...> +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_std_tuple<T>::value, T> +get(const basic_value<C, M, V>&); + +// map-like classes +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::is_map<T>, // T is map + detail::negation< // but not toml::table + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>&); + +// T.from_toml(v) +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::negation< // not a toml::* type + detail::is_exact_toml_type<T, basic_value<C, M, V>>>, + detail::has_from_toml_method<T, C, M, V>, // but has from_toml(toml::value) + std::is_default_constructible<T> // and default constructible + >::value, T> +get(const basic_value<C, M, V>&); + +// toml::from<T>::from_toml(v) +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::has_specialized_from<T>::value, T> +get(const basic_value<C, M, V>&); + +// T(const toml::value&) and T is not toml::basic_value, +// and it does not have `from<T>` nor `from_toml`. +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::negation<detail::is_basic_value<T>>, + std::is_constructible<T, const basic_value<C, M, V>&>, + detail::negation<detail::has_from_toml_method<T, C, M, V>>, + detail::negation<detail::has_specialized_from<T>> + >::value, T> +get(const basic_value<C, M, V>&); + +// ============================================================================ +// array-like types; most likely STL container, like std::vector, etc. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::is_container<T>, // T is a container + detail::has_push_back_method<T>, // container.push_back(elem) works + detail::negation< // but not toml::array + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>& v) +{ + using value_type = typename T::value_type; + const auto& ary = v.as_array(); + + T container; + try_reserve(container, ary.size()); + + for(const auto& elem : ary) + { + container.push_back(get<value_type>(elem)); + } + return container; +} + +// ============================================================================ +// std::forward_list does not have push_back, insert, or emplace. +// It has insert_after, emplace_after, push_front. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_std_forward_list<T>::value, T> +get(const basic_value<C, M, V>& v) +{ + using value_type = typename T::value_type; + T container; + for(const auto& elem : v.as_array()) + { + container.push_front(get<value_type>(elem)); + } + container.reverse(); + return container; +} + +// ============================================================================ +// array-like types, without push_back(). most likely [std|boost]::array. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::is_container<T>, // T is a container + detail::negation<detail::has_push_back_method<T>>, // w/o push_back + detail::negation< // T is not toml::array + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>& v) +{ + using value_type = typename T::value_type; + const auto& ar = v.as_array(); + + T container; + if(ar.size() != container.size()) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "toml::get: specified container size is ", container.size(), + " but there are ", ar.size(), " elements in toml array."), { + {v.location(), "here"} + })); + } + for(std::size_t i=0; i<ar.size(); ++i) + { + container[i] = ::toml::get<value_type>(ar[i]); + } + return container; +} + +// ============================================================================ +// std::pair. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_std_pair<T>::value, T> +get(const basic_value<C, M, V>& v) +{ + using first_type = typename T::first_type; + using second_type = typename T::second_type; + + const auto& ar = v.as_array(); + if(ar.size() != 2) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "toml::get: specified std::pair but there are ", ar.size(), + " elements in toml array."), {{v.location(), "here"}})); + } + return std::make_pair(::toml::get<first_type >(ar.at(0)), + ::toml::get<second_type>(ar.at(1))); +} + +// ============================================================================ +// std::tuple. + +namespace detail +{ +template<typename T, typename Array, std::size_t ... I> +T get_tuple_impl(const Array& a, index_sequence<I...>) +{ + return std::make_tuple( + ::toml::get<typename std::tuple_element<I, T>::type>(a.at(I))...); +} +} // detail + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_std_tuple<T>::value, T> +get(const basic_value<C, M, V>& v) +{ + const auto& ar = v.as_array(); + if(ar.size() != std::tuple_size<T>::value) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "toml::get: specified std::tuple with ", + std::tuple_size<T>::value, " elements, but there are ", ar.size(), + " elements in toml array."), {{v.location(), "here"}})); + } + return detail::get_tuple_impl<T>(ar, + detail::make_index_sequence<std::tuple_size<T>::value>{}); +} + +// ============================================================================ +// map-like types; most likely STL map, like std::map or std::unordered_map. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::is_map<T>, // T is map + detail::negation< // but not toml::array + detail::is_exact_toml_type<T, basic_value<C, M, V>>> + >::value, T> +get(const basic_value<C, M, V>& v) +{ + using key_type = typename T::key_type; + using mapped_type = typename T::mapped_type; + static_assert(std::is_convertible<std::string, key_type>::value, + "toml::get only supports map type of which key_type is " + "convertible from std::string."); + T map; + for(const auto& kv : v.as_table()) + { + map.emplace(key_type(kv.first), get<mapped_type>(kv.second)); + } + return map; +} + +// ============================================================================ +// user-defined, but compatible types. + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::negation< // not a toml::* type + detail::is_exact_toml_type<T, basic_value<C, M, V>>>, + detail::has_from_toml_method<T, C, M, V>, // but has from_toml(toml::value) memfn + std::is_default_constructible<T> // and default constructible + >::value, T> +get(const basic_value<C, M, V>& v) +{ + T ud; + ud.from_toml(v); + return ud; +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::has_specialized_from<T>::value, T> +get(const basic_value<C, M, V>& v) +{ + return ::toml::from<T>::from_toml(v); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::negation<detail::is_basic_value<T>>, // T is not a toml::value + std::is_constructible<T, const basic_value<C, M, V>&>, // T is constructible from toml::value + detail::negation<detail::has_from_toml_method<T, C, M, V>>, // and T does not have T.from_toml(v); + detail::negation<detail::has_specialized_from<T>> // and T does not have toml::from<T>{}; + >::value, T> +get(const basic_value<C, M, V>& v) +{ + return T(v); +} + +// ============================================================================ +// find + +// ---------------------------------------------------------------------------- +// these overloads do not require to set T. and returns value itself. +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> const& find(const basic_value<C, M, V>& v, const key& ky) +{ + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) + { + detail::throw_key_not_found_error(v, ky); + } + return tab.at(ky); +} +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V>& find(basic_value<C, M, V>& v, const key& ky) +{ + auto& tab = v.as_table(); + if(tab.count(ky) == 0) + { + detail::throw_key_not_found_error(v, ky); + } + return tab.at(ky); +} +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> find(basic_value<C, M, V>&& v, const key& ky) +{ + typename basic_value<C, M, V>::table_type tab = std::move(v).as_table(); + if(tab.count(ky) == 0) + { + detail::throw_key_not_found_error(v, ky); + } + return basic_value<C, M, V>(std::move(tab.at(ky))); +} + +// ---------------------------------------------------------------------------- +// find(value, idx) +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> const& +find(const basic_value<C, M, V>& v, const std::size_t idx) +{ + const auto& ary = v.as_array(); + if(ary.size() <= idx) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "index ", idx, " is out of range"), {{v.location(), "in this array"}})); + } + return ary.at(idx); +} +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V>& find(basic_value<C, M, V>& v, const std::size_t idx) +{ + auto& ary = v.as_array(); + if(ary.size() <= idx) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "index ", idx, " is out of range"), {{v.location(), "in this array"}})); + } + return ary.at(idx); +} +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> find(basic_value<C, M, V>&& v, const std::size_t idx) +{ + auto& ary = v.as_array(); + if(ary.size() <= idx) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "index ", idx, " is out of range"), {{v.location(), "in this array"}})); + } + return basic_value<C, M, V>(std::move(ary.at(idx))); +} + +// ---------------------------------------------------------------------------- +// find<T>(value, key); + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V> const&>())) +find(const basic_value<C, M, V>& v, const key& ky) +{ + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) + { + detail::throw_key_not_found_error(v, ky); + } + return ::toml::get<T>(tab.at(ky)); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V>&>())) +find(basic_value<C, M, V>& v, const key& ky) +{ + auto& tab = v.as_table(); + if(tab.count(ky) == 0) + { + detail::throw_key_not_found_error(v, ky); + } + return ::toml::get<T>(tab.at(ky)); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V>&&>())) +find(basic_value<C, M, V>&& v, const key& ky) +{ + typename basic_value<C, M, V>::table_type tab = std::move(v).as_table(); + if(tab.count(ky) == 0) + { + detail::throw_key_not_found_error(v, ky); + } + return ::toml::get<T>(std::move(tab.at(ky))); +} + +// ---------------------------------------------------------------------------- +// find<T>(value, idx) +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V> const&>())) +find(const basic_value<C, M, V>& v, const std::size_t idx) +{ + const auto& ary = v.as_array(); + if(ary.size() <= idx) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "index ", idx, " is out of range"), {{v.location(), "in this array"}})); + } + return ::toml::get<T>(ary.at(idx)); +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V>&>())) +find(basic_value<C, M, V>& v, const std::size_t idx) +{ + auto& ary = v.as_array(); + if(ary.size() <= idx) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "index ", idx, " is out of range"), {{v.location(), "in this array"}})); + } + return ::toml::get<T>(ary.at(idx)); +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V>&&>())) +find(basic_value<C, M, V>&& v, const std::size_t idx) +{ + typename basic_value<C, M, V>::array_type ary = std::move(v).as_array(); + if(ary.size() <= idx) + { + throw std::out_of_range(detail::format_underline(concat_to_string( + "index ", idx, " is out of range"), {{v.location(), "in this array"}})); + } + return ::toml::get<T>(std::move(ary.at(idx))); +} + +// -------------------------------------------------------------------------- +// toml::find(toml::value, toml::key, Ts&& ... keys) + +namespace detail +{ +// It suppresses warnings by -Wsign-conversion. Let's say we have the following +// code. +// ```cpp +// const auto x = toml::find<std::string>(data, "array", 0); +// ``` +// Here, the type of literal number `0` is `int`. `int` is a signed integer. +// `toml::find` takes `std::size_t` as an index. So it causes implicit sign +// conversion and `-Wsign-conversion` warns about it. Using `0u` instead of `0` +// suppresses the warning, but it makes user code messy. +// To suppress this warning, we need to be aware of type conversion caused +// by `toml::find(v, key1, key2, ... keys)`. But the thing is that the types of +// keys can be any combination of {string-like, size_t-like}. Of course we can't +// write down all the combinations. Thus we need to use some function that +// recognize the type of argument and cast it into `std::string` or +// `std::size_t` depending on the context. +// `key_cast` does the job. It has 2 overloads. One is invoked when the +// argument type is an integer and cast the argument into `std::size_t`. The +// other is invoked when the argument type is not an integer, possibly one of +// std::string, const char[N] or const char*, and construct std::string from +// the argument. +// `toml::find(v, k1, k2, ... ks)` uses `key_cast` before passing `ks` to +// `toml::find(v, k)` to suppress -Wsign-conversion. + +template<typename T> +enable_if_t<conjunction<std::is_integral<remove_cvref_t<T>>, + negation<std::is_same<remove_cvref_t<T>, bool>>>::value, std::size_t> +key_cast(T&& v) noexcept +{ + return std::size_t(v); +} +template<typename T> +enable_if_t<negation<conjunction<std::is_integral<remove_cvref_t<T>>, + negation<std::is_same<remove_cvref_t<T>, bool>>>>::value, std::string> +key_cast(T&& v) noexcept +{ + return std::string(std::forward<T>(v)); +} +} // detail + +template<typename C, + template<typename ...> class M, template<typename ...> class V, + typename Key1, typename Key2, typename ... Keys> +const basic_value<C, M, V>& +find(const basic_value<C, M, V>& v, Key1&& k1, Key2&& k2, Keys&& ... keys) +{ + return ::toml::find(::toml::find(v, detail::key_cast(k1)), + detail::key_cast(k2), std::forward<Keys>(keys)...); +} +template<typename C, + template<typename ...> class M, template<typename ...> class V, + typename Key1, typename Key2, typename ... Keys> +basic_value<C, M, V>& +find(basic_value<C, M, V>& v, Key1&& k1, Key2&& k2, Keys&& ... keys) +{ + return ::toml::find(::toml::find(v, detail::key_cast(k1)), + detail::key_cast(k2), std::forward<Keys>(keys)...); +} +template<typename C, + template<typename ...> class M, template<typename ...> class V, + typename Key1, typename Key2, typename ... Keys> +basic_value<C, M, V> +find(basic_value<C, M, V>&& v, Key1&& k1, Key2&& k2, Keys&& ... keys) +{ + return ::toml::find(::toml::find(std::move(v), std::forward<Key1>(k1)), + detail::key_cast(k2), std::forward<Keys>(keys)...); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V, + typename Key1, typename Key2, typename ... Keys> +decltype(::toml::get<T>(std::declval<const basic_value<C, M, V>&>())) +find(const basic_value<C, M, V>& v, Key1&& k1, Key2&& k2, Keys&& ... keys) +{ + return ::toml::find<T>(::toml::find(v, detail::key_cast(k1)), + detail::key_cast(k2), std::forward<Keys>(keys)...); +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V, + typename Key1, typename Key2, typename ... Keys> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V>&>())) +find(basic_value<C, M, V>& v, Key1&& k1, Key2&& k2, Keys&& ... keys) +{ + return ::toml::find<T>(::toml::find(v, detail::key_cast(k1)), + detail::key_cast(k2), std::forward<Keys>(keys)...); +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V, + typename Key1, typename Key2, typename ... Keys> +decltype(::toml::get<T>(std::declval<basic_value<C, M, V>&&>())) +find(basic_value<C, M, V>&& v, Key1&& k1, Key2&& k2, Keys&& ... keys) +{ + return ::toml::find<T>(::toml::find(std::move(v), detail::key_cast(k1)), + detail::key_cast(k2), std::forward<Keys>(keys)...); +} + +// ============================================================================ +// get_or(value, fallback) + +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> const& +get_or(const basic_value<C, M, V>& v, const basic_value<C, M, V>&) +{ + return v; +} +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V>& +get_or(basic_value<C, M, V>& v, basic_value<C, M, V>&) +{ + return v; +} +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> +get_or(basic_value<C, M, V>&& v, basic_value<C, M, V>&&) +{ + return v; +} + +// ---------------------------------------------------------------------------- +// specialization for the exact toml types (return type becomes lvalue ref) + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T> const& +get_or(const basic_value<C, M, V>& v, const T& opt) +{ + try + { + return get<detail::remove_cvref_t<T>>(v); + } + catch(...) + { + return opt; + } +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T>& +get_or(basic_value<C, M, V>& v, T& opt) +{ + try + { + return get<detail::remove_cvref_t<T>>(v); + } + catch(...) + { + return opt; + } +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_exact_toml_type<detail::remove_cvref_t<T>, + basic_value<C, M, V>>::value, detail::remove_cvref_t<T>> +get_or(basic_value<C, M, V>&& v, T&& opt) +{ + try + { + return get<detail::remove_cvref_t<T>>(std::move(v)); + } + catch(...) + { + return detail::remove_cvref_t<T>(std::forward<T>(opt)); + } +} + +// ---------------------------------------------------------------------------- +// specialization for std::string (return type becomes lvalue ref) + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<std::is_same<detail::remove_cvref_t<T>, std::string>::value, + std::string> const& +get_or(const basic_value<C, M, V>& v, const T& opt) +{ + try + { + return v.as_string().str; + } + catch(...) + { + return opt; + } +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<std::is_same<T, std::string>::value, std::string>& +get_or(basic_value<C, M, V>& v, T& opt) +{ + try + { + return v.as_string().str; + } + catch(...) + { + return opt; + } +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + std::is_same<detail::remove_cvref_t<T>, std::string>::value, std::string> +get_or(basic_value<C, M, V>&& v, T&& opt) +{ + try + { + return std::move(v.as_string().str); + } + catch(...) + { + return std::string(std::forward<T>(opt)); + } +} + +// ---------------------------------------------------------------------------- +// specialization for string literal + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::is_string_literal< + typename std::remove_reference<T>::type>::value, std::string> +get_or(const basic_value<C, M, V>& v, T&& opt) +{ + try + { + return std::move(v.as_string().str); + } + catch(...) + { + return std::string(std::forward<T>(opt)); + } +} + +// ---------------------------------------------------------------------------- +// others (require type conversion and return type cannot be lvalue reference) + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + detail::negation<detail::is_exact_toml_type<detail::remove_cvref_t<T>, + basic_value<C, M, V>>>, + detail::negation<std::is_same<std::string, detail::remove_cvref_t<T>>>, + detail::negation<detail::is_string_literal< + typename std::remove_reference<T>::type>> + >::value, detail::remove_cvref_t<T>> +get_or(const basic_value<C, M, V>& v, T&& opt) +{ + try + { + return get<detail::remove_cvref_t<T>>(v); + } + catch(...) + { + return detail::remove_cvref_t<T>(std::forward<T>(opt)); + } +} + +// =========================================================================== +// find_or(value, key, fallback) + +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> const& +find_or(const basic_value<C, M, V>& v, const key& ky, + const basic_value<C, M, V>& opt) +{ + if(!v.is_table()) {return opt;} + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return opt;} + return tab.at(ky); +} + +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V>& +find_or(basic_value<C, M, V>& v, const toml::key& ky, basic_value<C, M, V>& opt) +{ + if(!v.is_table()) {return opt;} + auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return opt;} + return tab.at(ky); +} + +template<typename C, + template<typename ...> class M, template<typename ...> class V> +basic_value<C, M, V> +find_or(basic_value<C, M, V>&& v, const toml::key& ky, basic_value<C, M, V>&& opt) +{ + if(!v.is_table()) {return opt;} + auto tab = std::move(v).as_table(); + if(tab.count(ky) == 0) {return opt;} + return basic_value<C, M, V>(std::move(tab.at(ky))); +} + +// --------------------------------------------------------------------------- +// exact types (return type can be a reference) +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T> const& +find_or(const basic_value<C, M, V>& v, const key& ky, const T& opt) +{ + if(!v.is_table()) {return opt;} + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return opt;} + return get_or(tab.at(ky), opt); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, T>& +find_or(basic_value<C, M, V>& v, const toml::key& ky, T& opt) +{ + if(!v.is_table()) {return opt;} + auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return opt;} + return get_or(tab.at(ky), opt); +} + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + detail::is_exact_toml_type<T, basic_value<C, M, V>>::value, + detail::remove_cvref_t<T>> +find_or(basic_value<C, M, V>&& v, const toml::key& ky, T&& opt) +{ + if(!v.is_table()) {return std::forward<T>(opt);} + auto tab = std::move(v).as_table(); + if(tab.count(ky) == 0) {return std::forward<T>(opt);} + return get_or(std::move(tab.at(ky)), std::forward<T>(opt)); +} + +// --------------------------------------------------------------------------- +// std::string (return type can be a reference) + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<std::is_same<T, std::string>::value, std::string> const& +find_or(const basic_value<C, M, V>& v, const key& ky, const T& opt) +{ + if(!v.is_table()) {return opt;} + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return opt;} + return get_or(tab.at(ky), opt); +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<std::is_same<T, std::string>::value, std::string>& +find_or(basic_value<C, M, V>& v, const toml::key& ky, T& opt) +{ + if(!v.is_table()) {return opt;} + auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return opt;} + return get_or(tab.at(ky), opt); +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<std::is_same<T, std::string>::value, std::string> +find_or(basic_value<C, M, V>&& v, const toml::key& ky, T&& opt) +{ + if(!v.is_table()) {return std::forward<T>(opt);} + auto tab = std::move(v).as_table(); + if(tab.count(ky) == 0) {return std::forward<T>(opt);} + return get_or(std::move(tab.at(ky)), std::forward<T>(opt)); +} + +// --------------------------------------------------------------------------- +// string literal (deduced as std::string) +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t< + detail::is_string_literal<typename std::remove_reference<T>::type>::value, + std::string> +find_or(const basic_value<C, M, V>& v, const toml::key& ky, T&& opt) +{ + if(!v.is_table()) {return std::string(opt);} + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return std::string(opt);} + return get_or(tab.at(ky), std::forward<T>(opt)); +} + +// --------------------------------------------------------------------------- +// others (require type conversion and return type cannot be lvalue reference) +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +detail::enable_if_t<detail::conjunction< + // T is not an exact toml type + detail::negation<detail::is_exact_toml_type< + detail::remove_cvref_t<T>, basic_value<C, M, V>>>, + // T is not std::string + detail::negation<std::is_same<std::string, detail::remove_cvref_t<T>>>, + // T is not a string literal + detail::negation<detail::is_string_literal< + typename std::remove_reference<T>::type>> + >::value, detail::remove_cvref_t<T>> +find_or(const basic_value<C, M, V>& v, const toml::key& ky, T&& opt) +{ + if(!v.is_table()) {return std::forward<T>(opt);} + const auto& tab = v.as_table(); + if(tab.count(ky) == 0) {return std::forward<T>(opt);} + return get_or(tab.at(ky), std::forward<T>(opt)); +} + +// --------------------------------------------------------------------------- +// recursive find-or with type deduction (find_or(value, keys, opt)) + +template<typename Value, typename ... Ks, + typename detail::enable_if_t<(sizeof...(Ks) > 1), std::nullptr_t> = nullptr> + // here we need to add SFINAE in the template parameter to avoid + // infinite recursion in type deduction on gcc +auto find_or(Value&& v, const toml::key& ky, Ks&& ... keys) + -> decltype(find_or(std::forward<Value>(v), ky, detail::last_one(std::forward<Ks>(keys)...))) +{ + if(!v.is_table()) + { + return detail::last_one(std::forward<Ks>(keys)...); + } + auto&& tab = std::forward<Value>(v).as_table(); + if(tab.count(ky) == 0) + { + return detail::last_one(std::forward<Ks>(keys)...); + } + return find_or(std::forward<decltype(tab)>(tab).at(ky), std::forward<Ks>(keys)...); +} + +// --------------------------------------------------------------------------- +// recursive find_or with explicit type specialization, find_or<int>(value, keys...) + +template<typename T, typename Value, typename ... Ks, + typename detail::enable_if_t<(sizeof...(Ks) > 1), std::nullptr_t> = nullptr> + // here we need to add SFINAE in the template parameter to avoid + // infinite recursion in type deduction on gcc +auto find_or(Value&& v, const toml::key& ky, Ks&& ... keys) + -> decltype(find_or<T>(std::forward<Value>(v), ky, detail::last_one(std::forward<Ks>(keys)...))) +{ + if(!v.is_table()) + { + return detail::last_one(std::forward<Ks>(keys)...); + } + auto&& tab = std::forward<Value>(v).as_table(); + if(tab.count(ky) == 0) + { + return detail::last_one(std::forward<Ks>(keys)...); + } + return find_or(std::forward<decltype(tab)>(tab).at(ky), std::forward<Ks>(keys)...); +} + +// ============================================================================ +// expect + +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +result<T, std::string> expect(const basic_value<C, M, V>& v) noexcept +{ + try + { + return ok(get<T>(v)); + } + catch(const std::exception& e) + { + return err(e.what()); + } +} +template<typename T, typename C, + template<typename ...> class M, template<typename ...> class V> +result<T, std::string> +expect(const basic_value<C, M, V>& v, const toml::key& k) noexcept +{ + try + { + return ok(find<T>(v, k)); + } + catch(const std::exception& e) + { + return err(e.what()); + } +} + +} // toml +#endif// TOML11_GET diff --git a/src/toml11/toml/into.hpp b/src/toml11/toml/into.hpp new file mode 100644 index 000000000..74495560e --- /dev/null +++ b/src/toml11/toml/into.hpp @@ -0,0 +1,19 @@ +// Copyright Toru Niina 2019. +// Distributed under the MIT License. +#ifndef TOML11_INTO_HPP +#define TOML11_INTO_HPP + +namespace toml +{ + +template<typename T> +struct into; +// { +// static toml::value into_toml(const T& user_defined_type) +// { +// // User-defined conversions ... +// } +// }; + +} // toml +#endif // TOML11_INTO_HPP diff --git a/src/toml11/toml/lexer.hpp b/src/toml11/toml/lexer.hpp new file mode 100644 index 000000000..ea5050b8d --- /dev/null +++ b/src/toml11/toml/lexer.hpp @@ -0,0 +1,293 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_LEXER_HPP +#define TOML11_LEXER_HPP +#include <istream> +#include <sstream> +#include <stdexcept> +#include <fstream> + +#include "combinator.hpp" + +namespace toml +{ +namespace detail +{ + +// these scans contents from current location in a container of char +// and extract a region that matches their own pattern. +// to see the implementation of each component, see combinator.hpp. + +using lex_wschar = either<character<' '>, character<'\t'>>; +using lex_ws = repeat<lex_wschar, at_least<1>>; +using lex_newline = either<character<'\n'>, + sequence<character<'\r'>, character<'\n'>>>; +using lex_lower = in_range<'a', 'z'>; +using lex_upper = in_range<'A', 'Z'>; +using lex_alpha = either<lex_lower, lex_upper>; +using lex_digit = in_range<'0', '9'>; +using lex_nonzero = in_range<'1', '9'>; +using lex_oct_dig = in_range<'0', '7'>; +using lex_bin_dig = in_range<'0', '1'>; +using lex_hex_dig = either<lex_digit, in_range<'A', 'F'>, in_range<'a', 'f'>>; + +using lex_hex_prefix = sequence<character<'0'>, character<'x'>>; +using lex_oct_prefix = sequence<character<'0'>, character<'o'>>; +using lex_bin_prefix = sequence<character<'0'>, character<'b'>>; +using lex_underscore = character<'_'>; +using lex_plus = character<'+'>; +using lex_minus = character<'-'>; +using lex_sign = either<lex_plus, lex_minus>; + +// digit | nonzero 1*(digit | _ digit) +using lex_unsigned_dec_int = either<sequence<lex_nonzero, repeat< + either<lex_digit, sequence<lex_underscore, lex_digit>>, at_least<1>>>, + lex_digit>; +// (+|-)? unsigned_dec_int +using lex_dec_int = sequence<maybe<lex_sign>, lex_unsigned_dec_int>; + +// hex_prefix hex_dig *(hex_dig | _ hex_dig) +using lex_hex_int = sequence<lex_hex_prefix, sequence<lex_hex_dig, repeat< + either<lex_hex_dig, sequence<lex_underscore, lex_hex_dig>>, unlimited>>>; +// oct_prefix oct_dig *(oct_dig | _ oct_dig) +using lex_oct_int = sequence<lex_oct_prefix, sequence<lex_oct_dig, repeat< + either<lex_oct_dig, sequence<lex_underscore, lex_oct_dig>>, unlimited>>>; +// bin_prefix bin_dig *(bin_dig | _ bin_dig) +using lex_bin_int = sequence<lex_bin_prefix, sequence<lex_bin_dig, repeat< + either<lex_bin_dig, sequence<lex_underscore, lex_bin_dig>>, unlimited>>>; + +// (dec_int | hex_int | oct_int | bin_int) +using lex_integer = either<lex_bin_int, lex_oct_int, lex_hex_int, lex_dec_int>; + +// =========================================================================== + +using lex_inf = sequence<character<'i'>, character<'n'>, character<'f'>>; +using lex_nan = sequence<character<'n'>, character<'a'>, character<'n'>>; +using lex_special_float = sequence<maybe<lex_sign>, either<lex_inf, lex_nan>>; + +using lex_zero_prefixable_int = sequence<lex_digit, repeat<either<lex_digit, + sequence<lex_underscore, lex_digit>>, unlimited>>; + +using lex_fractional_part = sequence<character<'.'>, lex_zero_prefixable_int>; + +using lex_exponent_part = sequence<either<character<'e'>, character<'E'>>, + maybe<lex_sign>, lex_zero_prefixable_int>; + +using lex_float = either<lex_special_float, + sequence<lex_dec_int, either<lex_exponent_part, + sequence<lex_fractional_part, maybe<lex_exponent_part>>>>>; + +// =========================================================================== + +using lex_true = sequence<character<'t'>, character<'r'>, + character<'u'>, character<'e'>>; +using lex_false = sequence<character<'f'>, character<'a'>, character<'l'>, + character<'s'>, character<'e'>>; +using lex_boolean = either<lex_true, lex_false>; + +// =========================================================================== + +using lex_date_fullyear = repeat<lex_digit, exactly<4>>; +using lex_date_month = repeat<lex_digit, exactly<2>>; +using lex_date_mday = repeat<lex_digit, exactly<2>>; +using lex_time_delim = either<character<'T'>, character<'t'>, character<' '>>; +using lex_time_hour = repeat<lex_digit, exactly<2>>; +using lex_time_minute = repeat<lex_digit, exactly<2>>; +using lex_time_second = repeat<lex_digit, exactly<2>>; +using lex_time_secfrac = sequence<character<'.'>, + repeat<lex_digit, at_least<1>>>; + +using lex_time_numoffset = sequence<either<character<'+'>, character<'-'>>, + sequence<lex_time_hour, character<':'>, + lex_time_minute>>; +using lex_time_offset = either<character<'Z'>, character<'z'>, + lex_time_numoffset>; + +using lex_partial_time = sequence<lex_time_hour, character<':'>, + lex_time_minute, character<':'>, + lex_time_second, maybe<lex_time_secfrac>>; +using lex_full_date = sequence<lex_date_fullyear, character<'-'>, + lex_date_month, character<'-'>, + lex_date_mday>; +using lex_full_time = sequence<lex_partial_time, lex_time_offset>; + +using lex_offset_date_time = sequence<lex_full_date, lex_time_delim, lex_full_time>; +using lex_local_date_time = sequence<lex_full_date, lex_time_delim, lex_partial_time>; +using lex_local_date = lex_full_date; +using lex_local_time = lex_partial_time; + +// =========================================================================== + +using lex_quotation_mark = character<'"'>; +using lex_basic_unescaped = exclude<either<in_range<0x00, 0x08>, // 0x09 (tab) is allowed + in_range<0x0A, 0x1F>, + character<0x22>, character<0x5C>, + character<0x7F>>>; + +using lex_escape = character<'\\'>; +using lex_escape_unicode_short = sequence<character<'u'>, + repeat<lex_hex_dig, exactly<4>>>; +using lex_escape_unicode_long = sequence<character<'U'>, + repeat<lex_hex_dig, exactly<8>>>; +using lex_escape_seq_char = either<character<'"'>, character<'\\'>, + character<'b'>, character<'f'>, + character<'n'>, character<'r'>, + character<'t'>, + lex_escape_unicode_short, + lex_escape_unicode_long + >; +using lex_escaped = sequence<lex_escape, lex_escape_seq_char>; +using lex_basic_char = either<lex_basic_unescaped, lex_escaped>; +using lex_basic_string = sequence<lex_quotation_mark, + repeat<lex_basic_char, unlimited>, + lex_quotation_mark>; + +// After toml post-v0.5.0, it is explicitly clarified how quotes in ml-strings +// are allowed to be used. +// After this, the following strings are *explicitly* allowed. +// - One or two `"`s in a multi-line basic string is allowed wherever it is. +// - Three consecutive `"`s in a multi-line basic string is considered as a delimiter. +// - One or two `"`s can appear just before or after the delimiter. +// ```toml +// str4 = """Here are two quotation marks: "". Simple enough.""" +// str5 = """Here are three quotation marks: ""\".""" +// str6 = """Here are fifteen quotation marks: ""\"""\"""\"""\"""\".""" +// str7 = """"This," she said, "is just a pointless statement."""" +// ``` +// In the current implementation (v3.3.0), it is difficult to parse `str7` in +// the above example. It is difficult to recognize `"` at the end of string body +// collectly. It will be misunderstood as a `"""` delimiter and an additional, +// invalid `"`. Like this: +// ```console +// what(): [error] toml::parse_table: invalid line format +// --> hoge.toml +// | +// 13 | str7 = """"This," she said, "is just a pointless statement."""" +// | ^- expected newline, but got '"'. +// ``` +// As a quick workaround for this problem, `lex_ml_basic_string_delim` was +// split into two, `lex_ml_basic_string_open` and `lex_ml_basic_string_close`. +// `lex_ml_basic_string_open` allows only `"""`. `_close` allows 3-5 `"`s. +// In parse_ml_basic_string() function, the trailing `"`s will be attached to +// the string body. +// +using lex_ml_basic_string_delim = repeat<lex_quotation_mark, exactly<3>>; +using lex_ml_basic_string_open = lex_ml_basic_string_delim; +using lex_ml_basic_string_close = sequence< + repeat<lex_quotation_mark, exactly<3>>, + maybe<lex_quotation_mark>, maybe<lex_quotation_mark> + >; + +using lex_ml_basic_unescaped = exclude<either<in_range<0x00, 0x08>, // 0x09 is tab + in_range<0x0A, 0x1F>, + character<0x5C>, // backslash + character<0x7F>, // DEL + lex_ml_basic_string_delim>>; + +using lex_ml_basic_escaped_newline = sequence< + lex_escape, maybe<lex_ws>, lex_newline, + repeat<either<lex_ws, lex_newline>, unlimited>>; + +using lex_ml_basic_char = either<lex_ml_basic_unescaped, lex_escaped>; +using lex_ml_basic_body = repeat<either<lex_ml_basic_char, lex_newline, + lex_ml_basic_escaped_newline>, + unlimited>; +using lex_ml_basic_string = sequence<lex_ml_basic_string_open, + lex_ml_basic_body, + lex_ml_basic_string_close>; + +using lex_literal_char = exclude<either<in_range<0x00, 0x08>, in_range<0x0A, 0x1F>, + character<0x7F>, character<0x27>>>; +using lex_apostrophe = character<'\''>; +using lex_literal_string = sequence<lex_apostrophe, + repeat<lex_literal_char, unlimited>, + lex_apostrophe>; + +// the same reason as above. +using lex_ml_literal_string_delim = repeat<lex_apostrophe, exactly<3>>; +using lex_ml_literal_string_open = lex_ml_literal_string_delim; +using lex_ml_literal_string_close = sequence< + repeat<lex_apostrophe, exactly<3>>, + maybe<lex_apostrophe>, maybe<lex_apostrophe> + >; + +using lex_ml_literal_char = exclude<either<in_range<0x00, 0x08>, + in_range<0x0A, 0x1F>, + character<0x7F>, + lex_ml_literal_string_delim>>; +using lex_ml_literal_body = repeat<either<lex_ml_literal_char, lex_newline>, + unlimited>; +using lex_ml_literal_string = sequence<lex_ml_literal_string_open, + lex_ml_literal_body, + lex_ml_literal_string_close>; + +using lex_string = either<lex_ml_basic_string, lex_basic_string, + lex_ml_literal_string, lex_literal_string>; + +// =========================================================================== +using lex_dot_sep = sequence<maybe<lex_ws>, character<'.'>, maybe<lex_ws>>; + +using lex_unquoted_key = repeat<either<lex_alpha, lex_digit, + character<'-'>, character<'_'>>, + at_least<1>>; +using lex_quoted_key = either<lex_basic_string, lex_literal_string>; +using lex_simple_key = either<lex_unquoted_key, lex_quoted_key>; +using lex_dotted_key = sequence<lex_simple_key, + repeat<sequence<lex_dot_sep, lex_simple_key>, + at_least<1> + > + >; +using lex_key = either<lex_dotted_key, lex_simple_key>; + +using lex_keyval_sep = sequence<maybe<lex_ws>, + character<'='>, + maybe<lex_ws>>; + +using lex_std_table_open = character<'['>; +using lex_std_table_close = character<']'>; +using lex_std_table = sequence<lex_std_table_open, + maybe<lex_ws>, + lex_key, + maybe<lex_ws>, + lex_std_table_close>; + +using lex_array_table_open = sequence<lex_std_table_open, lex_std_table_open>; +using lex_array_table_close = sequence<lex_std_table_close, lex_std_table_close>; +using lex_array_table = sequence<lex_array_table_open, + maybe<lex_ws>, + lex_key, + maybe<lex_ws>, + lex_array_table_close>; + +using lex_utf8_1byte = in_range<0x00, 0x7F>; +using lex_utf8_2byte = sequence< + in_range<static_cast<char>(0xC2), static_cast<char>(0xDF)>, + in_range<static_cast<char>(0x80), static_cast<char>(0xBF)> + >; +using lex_utf8_3byte = sequence<either< + sequence<character<static_cast<char>(0xE0)>, in_range<static_cast<char>(0xA0), static_cast<char>(0xBF)>>, + sequence<in_range <static_cast<char>(0xE1), static_cast<char>(0xEC)>, in_range<static_cast<char>(0x80), static_cast<char>(0xBF)>>, + sequence<character<static_cast<char>(0xED)>, in_range<static_cast<char>(0x80), static_cast<char>(0x9F)>>, + sequence<in_range <static_cast<char>(0xEE), static_cast<char>(0xEF)>, in_range<static_cast<char>(0x80), static_cast<char>(0xBF)>> + >, in_range<static_cast<char>(0x80), static_cast<char>(0xBF)>>; +using lex_utf8_4byte = sequence<either< + sequence<character<static_cast<char>(0xF0)>, in_range<static_cast<char>(0x90), static_cast<char>(0xBF)>>, + sequence<in_range <static_cast<char>(0xF1), static_cast<char>(0xF3)>, in_range<static_cast<char>(0x80), static_cast<char>(0xBF)>>, + sequence<character<static_cast<char>(0xF4)>, in_range<static_cast<char>(0x80), static_cast<char>(0x8F)>> + >, in_range<static_cast<char>(0x80), static_cast<char>(0xBF)>, + in_range<static_cast<char>(0x80), static_cast<char>(0xBF)>>; +using lex_utf8_code = either< + lex_utf8_1byte, + lex_utf8_2byte, + lex_utf8_3byte, + lex_utf8_4byte + >; + +using lex_comment_start_symbol = character<'#'>; +using lex_non_eol_ascii = either<character<0x09>, in_range<0x20, 0x7E>>; +using lex_comment = sequence<lex_comment_start_symbol, repeat<either< + lex_non_eol_ascii, lex_utf8_2byte, lex_utf8_3byte, lex_utf8_4byte>, unlimited>>; + +} // detail +} // toml +#endif // TOML_LEXER_HPP diff --git a/src/toml11/toml/literal.hpp b/src/toml11/toml/literal.hpp new file mode 100644 index 000000000..04fbbc13e --- /dev/null +++ b/src/toml11/toml/literal.hpp @@ -0,0 +1,113 @@ +// Copyright Toru Niina 2019. +// Distributed under the MIT License. +#ifndef TOML11_LITERAL_HPP +#define TOML11_LITERAL_HPP +#include "parser.hpp" + +namespace toml +{ +inline namespace literals +{ +inline namespace toml_literals +{ + +// implementation +inline ::toml::basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector> +literal_internal_impl(::toml::detail::location loc) +{ + using value_type = ::toml::basic_value< + TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>; + // if there are some comments or empty lines, skip them. + using skip_line = ::toml::detail::repeat<toml::detail::sequence< + ::toml::detail::maybe<::toml::detail::lex_ws>, + ::toml::detail::maybe<::toml::detail::lex_comment>, + ::toml::detail::lex_newline + >, ::toml::detail::at_least<1>>; + skip_line::invoke(loc); + + // if there are some whitespaces before a value, skip them. + using skip_ws = ::toml::detail::repeat< + ::toml::detail::lex_ws, ::toml::detail::at_least<1>>; + skip_ws::invoke(loc); + + // to distinguish arrays and tables, first check it is a table or not. + // + // "[1,2,3]"_toml; // this is an array + // "[table]"_toml; // a table that has an empty table named "table" inside. + // "[[1,2,3]]"_toml; // this is an array of arrays + // "[[table]]"_toml; // this is a table that has an array of tables inside. + // + // "[[1]]"_toml; // this can be both... (currently it becomes a table) + // "1 = [{}]"_toml; // this is a table that has an array of table named 1. + // "[[1,]]"_toml; // this is an array of arrays. + // "[[1],]"_toml; // this also. + + const auto the_front = loc.iter(); + + const bool is_table_key = ::toml::detail::lex_std_table::invoke(loc); + loc.reset(the_front); + + const bool is_aots_key = ::toml::detail::lex_array_table::invoke(loc); + loc.reset(the_front); + + // If it is neither a table-key or a array-of-table-key, it may be a value. + if(!is_table_key && !is_aots_key) + { + if(auto data = ::toml::detail::parse_value<value_type>(loc)) + { + return data.unwrap(); + } + } + + // Note that still it can be a table, because the literal might be something + // like the following. + // ```cpp + // R"( // c++11 raw string literals + // key = "value" + // int = 42 + // )"_toml; + // ``` + // It is a valid toml file. + // It should be parsed as if we parse a file with this content. + + if(auto data = ::toml::detail::parse_toml_file<value_type>(loc)) + { + return data.unwrap(); + } + else // none of them. + { + throw ::toml::syntax_error(data.unwrap_err(), source_location(loc)); + } + +} + +inline ::toml::basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector> +operator"" _toml(const char* str, std::size_t len) +{ + ::toml::detail::location loc( + std::string("TOML literal encoded in a C++ code"), + std::vector<char>(str, str + len)); + // literal length does not include the null character at the end. + return literal_internal_impl(std::move(loc)); +} + +// value of __cplusplus in C++2a/20 mode is not fixed yet along compilers. +// So here we use the feature test macro for `char8_t` itself. +#if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L +// value of u8"" literal has been changed from char to char8_t and char8_t is +// NOT compatible to char +inline ::toml::basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector> +operator"" _toml(const char8_t* str, std::size_t len) +{ + ::toml::detail::location loc( + std::string("TOML literal encoded in a C++ code"), + std::vector<char>(reinterpret_cast<const char*>(str), + reinterpret_cast<const char*>(str) + len)); + return literal_internal_impl(std::move(loc)); +} +#endif + +} // toml_literals +} // literals +} // toml +#endif//TOML11_LITERAL_HPP diff --git a/src/toml11/toml/macros.hpp b/src/toml11/toml/macros.hpp new file mode 100644 index 000000000..e8f91aecd --- /dev/null +++ b/src/toml11/toml/macros.hpp @@ -0,0 +1,121 @@ +#ifndef TOML11_MACROS_HPP +#define TOML11_MACROS_HPP + +#define TOML11_STRINGIZE_AUX(x) #x +#define TOML11_STRINGIZE(x) TOML11_STRINGIZE_AUX(x) + +#define TOML11_CONCATENATE_AUX(x, y) x##y +#define TOML11_CONCATENATE(x, y) TOML11_CONCATENATE_AUX(x, y) + +// ============================================================================ +// TOML11_DEFINE_CONVERSION_NON_INTRUSIVE + +#ifndef TOML11_WITHOUT_DEFINE_NON_INTRUSIVE + +// ---------------------------------------------------------------------------- +// TOML11_ARGS_SIZE + +#define TOML11_INDEX_RSEQ() \ + 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, \ + 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 +#define TOML11_ARGS_SIZE_IMPL(\ + ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, ARG7, ARG8, ARG9, ARG10, \ + ARG11, ARG12, ARG13, ARG14, ARG15, ARG16, ARG17, ARG18, ARG19, ARG20, \ + ARG21, ARG22, ARG23, ARG24, ARG25, ARG26, ARG27, ARG28, ARG29, ARG30, \ + ARG31, ARG32, N, ...) N +#define TOML11_ARGS_SIZE_AUX(...) TOML11_ARGS_SIZE_IMPL(__VA_ARGS__) +#define TOML11_ARGS_SIZE(...) TOML11_ARGS_SIZE_AUX(__VA_ARGS__, TOML11_INDEX_RSEQ()) + +// ---------------------------------------------------------------------------- +// TOML11_FOR_EACH_VA_ARGS + +#define TOML11_FOR_EACH_VA_ARGS_AUX_1( FUNCTOR, ARG1 ) FUNCTOR(ARG1) +#define TOML11_FOR_EACH_VA_ARGS_AUX_2( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_1( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_3( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_2( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_4( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_3( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_5( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_4( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_6( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_5( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_7( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_6( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_8( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_7( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_9( FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_8( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_10(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_9( FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_11(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_10(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_12(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_11(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_13(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_12(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_14(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_13(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_15(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_14(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_16(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_15(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_17(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_16(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_18(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_17(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_19(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_18(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_20(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_19(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_21(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_20(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_22(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_21(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_23(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_22(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_24(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_23(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_25(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_24(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_26(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_25(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_27(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_26(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_28(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_27(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_29(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_28(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_30(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_29(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_31(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_30(FUNCTOR, __VA_ARGS__) +#define TOML11_FOR_EACH_VA_ARGS_AUX_32(FUNCTOR, ARG1, ...) FUNCTOR(ARG1) TOML11_FOR_EACH_VA_ARGS_AUX_31(FUNCTOR, __VA_ARGS__) + +#define TOML11_FOR_EACH_VA_ARGS(FUNCTOR, ...)\ + TOML11_CONCATENATE(TOML11_FOR_EACH_VA_ARGS_AUX_, TOML11_ARGS_SIZE(__VA_ARGS__))(FUNCTOR, __VA_ARGS__) + +// ---------------------------------------------------------------------------- +// TOML11_DEFINE_CONVERSION_NON_INTRUSIVE + +// use it in the following way. +// ```cpp +// namespace foo +// { +// struct Foo +// { +// std::string s; +// double d; +// int i; +// }; +// } // foo +// +// TOML11_DEFINE_CONVERSION_NON_INTRUSIVE(foo::Foo, s, d, i) +// ``` +// And then you can use `toml::find<foo::Foo>(file, "foo");` +// +#define TOML11_FIND_MEMBER_VARIABLE_FROM_VALUE(VAR_NAME)\ + obj.VAR_NAME = toml::find<decltype(obj.VAR_NAME)>(v, TOML11_STRINGIZE(VAR_NAME)); + +#define TOML11_ASSIGN_MEMBER_VARIABLE_TO_VALUE(VAR_NAME)\ + v[TOML11_STRINGIZE(VAR_NAME)] = obj.VAR_NAME; + +#define TOML11_DEFINE_CONVERSION_NON_INTRUSIVE(NAME, ...)\ + namespace toml { \ + template<> \ + struct from<NAME> \ + { \ + template<typename C, template<typename ...> class T, \ + template<typename ...> class A> \ + static NAME from_toml(const basic_value<C, T, A>& v) \ + { \ + NAME obj; \ + TOML11_FOR_EACH_VA_ARGS(TOML11_FIND_MEMBER_VARIABLE_FROM_VALUE, __VA_ARGS__) \ + return obj; \ + } \ + }; \ + template<> \ + struct into<NAME> \ + { \ + static value into_toml(const NAME& obj) \ + { \ + ::toml::value v = ::toml::table{}; \ + TOML11_FOR_EACH_VA_ARGS(TOML11_ASSIGN_MEMBER_VARIABLE_TO_VALUE, __VA_ARGS__) \ + return v; \ + } \ + }; \ + } /* toml */ + +#endif// TOML11_WITHOUT_DEFINE_NON_INTRUSIVE + +#endif// TOML11_MACROS_HPP diff --git a/src/toml11/toml/parser.hpp b/src/toml11/toml/parser.hpp new file mode 100644 index 000000000..e31179918 --- /dev/null +++ b/src/toml11/toml/parser.hpp @@ -0,0 +1,2364 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_PARSER_HPP +#define TOML11_PARSER_HPP +#include <cstring> +#include <fstream> +#include <sstream> + +#include "combinator.hpp" +#include "lexer.hpp" +#include "region.hpp" +#include "result.hpp" +#include "types.hpp" +#include "value.hpp" + +#ifndef TOML11_DISABLE_STD_FILESYSTEM +#ifdef __cpp_lib_filesystem +#if __has_include(<filesystem>) +#define TOML11_HAS_STD_FILESYSTEM +#include <filesystem> +#endif // has_include(<string_view>) +#endif // __cpp_lib_filesystem +#endif // TOML11_DISABLE_STD_FILESYSTEM + +namespace toml +{ +namespace detail +{ + +inline result<std::pair<boolean, region>, std::string> +parse_boolean(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_boolean::invoke(loc)) + { + const auto reg = token.unwrap(); + if (reg.str() == "true") {return ok(std::make_pair(true, reg));} + else if(reg.str() == "false") {return ok(std::make_pair(false, reg));} + else // internal error. + { + throw internal_error(format_underline( + "toml::parse_boolean: internal error", + {{source_location(reg), "invalid token"}}), + source_location(reg)); + } + } + loc.reset(first); //rollback + return err(format_underline("toml::parse_boolean: ", + {{source_location(loc), "the next token is not a boolean"}})); +} + +inline result<std::pair<integer, region>, std::string> +parse_binary_integer(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_bin_int::invoke(loc)) + { + auto str = token.unwrap().str(); + assert(str.size() > 2); // minimum -> 0b1 + integer retval(0), base(1); + for(auto i(str.rbegin()), e(str.rend() - 2); i!=e; ++i) + { + if (*i == '1'){retval += base; base *= 2;} + else if(*i == '0'){base *= 2;} + else if(*i == '_'){/* do nothing. */} + else // internal error. + { + throw internal_error(format_underline( + "toml::parse_integer: internal error", + {{source_location(token.unwrap()), "invalid token"}}), + source_location(loc)); + } + } + return ok(std::make_pair(retval, token.unwrap())); + } + loc.reset(first); + return err(format_underline("toml::parse_binary_integer:", + {{source_location(loc), "the next token is not an integer"}})); +} + +inline result<std::pair<integer, region>, std::string> +parse_octal_integer(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_oct_int::invoke(loc)) + { + auto str = token.unwrap().str(); + str.erase(std::remove(str.begin(), str.end(), '_'), str.end()); + str.erase(str.begin()); str.erase(str.begin()); // remove `0o` prefix + + std::istringstream iss(str); + integer retval(0); + iss >> std::oct >> retval; + return ok(std::make_pair(retval, token.unwrap())); + } + loc.reset(first); + return err(format_underline("toml::parse_octal_integer:", + {{source_location(loc), "the next token is not an integer"}})); +} + +inline result<std::pair<integer, region>, std::string> +parse_hexadecimal_integer(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_hex_int::invoke(loc)) + { + auto str = token.unwrap().str(); + str.erase(std::remove(str.begin(), str.end(), '_'), str.end()); + str.erase(str.begin()); str.erase(str.begin()); // remove `0x` prefix + + std::istringstream iss(str); + integer retval(0); + iss >> std::hex >> retval; + return ok(std::make_pair(retval, token.unwrap())); + } + loc.reset(first); + return err(format_underline("toml::parse_hexadecimal_integer", + {{source_location(loc), "the next token is not an integer"}})); +} + +inline result<std::pair<integer, region>, std::string> +parse_integer(location& loc) +{ + const auto first = loc.iter(); + if(first != loc.end() && *first == '0') + { + const auto second = std::next(first); + if(second == loc.end()) // the token is just zero. + { + loc.advance(); + return ok(std::make_pair(0, region(loc, first, second))); + } + + if(*second == 'b') {return parse_binary_integer (loc);} // 0b1100 + if(*second == 'o') {return parse_octal_integer (loc);} // 0o775 + if(*second == 'x') {return parse_hexadecimal_integer(loc);} // 0xC0FFEE + + if(std::isdigit(*second)) + { + return err(format_underline("toml::parse_integer: " + "leading zero in an Integer is not allowed.", + {{source_location(loc), "leading zero"}})); + } + else if(std::isalpha(*second)) + { + return err(format_underline("toml::parse_integer: " + "unknown integer prefix appeared.", + {{source_location(loc), "none of 0x, 0o, 0b"}})); + } + } + + if(const auto token = lex_dec_int::invoke(loc)) + { + auto str = token.unwrap().str(); + str.erase(std::remove(str.begin(), str.end(), '_'), str.end()); + + std::istringstream iss(str); + integer retval(0); + iss >> retval; + return ok(std::make_pair(retval, token.unwrap())); + } + loc.reset(first); + return err(format_underline("toml::parse_integer: ", + {{source_location(loc), "the next token is not an integer"}})); +} + +inline result<std::pair<floating, region>, std::string> +parse_floating(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_float::invoke(loc)) + { + auto str = token.unwrap().str(); + if(str == "inf" || str == "+inf") + { + if(std::numeric_limits<floating>::has_infinity) + { + return ok(std::make_pair( + std::numeric_limits<floating>::infinity(), token.unwrap())); + } + else + { + throw std::domain_error("toml::parse_floating: inf value found" + " but the current environment does not support inf. Please" + " make sure that the floating-point implementation conforms" + " IEEE 754/ISO 60559 international standard."); + } + } + else if(str == "-inf") + { + if(std::numeric_limits<floating>::has_infinity) + { + return ok(std::make_pair( + -std::numeric_limits<floating>::infinity(), token.unwrap())); + } + else + { + throw std::domain_error("toml::parse_floating: inf value found" + " but the current environment does not support inf. Please" + " make sure that the floating-point implementation conforms" + " IEEE 754/ISO 60559 international standard."); + } + } + else if(str == "nan" || str == "+nan") + { + if(std::numeric_limits<floating>::has_quiet_NaN) + { + return ok(std::make_pair( + std::numeric_limits<floating>::quiet_NaN(), token.unwrap())); + } + else if(std::numeric_limits<floating>::has_signaling_NaN) + { + return ok(std::make_pair( + std::numeric_limits<floating>::signaling_NaN(), token.unwrap())); + } + else + { + throw std::domain_error("toml::parse_floating: NaN value found" + " but the current environment does not support NaN. Please" + " make sure that the floating-point implementation conforms" + " IEEE 754/ISO 60559 international standard."); + } + } + else if(str == "-nan") + { + if(std::numeric_limits<floating>::has_quiet_NaN) + { + return ok(std::make_pair( + -std::numeric_limits<floating>::quiet_NaN(), token.unwrap())); + } + else if(std::numeric_limits<floating>::has_signaling_NaN) + { + return ok(std::make_pair( + -std::numeric_limits<floating>::signaling_NaN(), token.unwrap())); + } + else + { + throw std::domain_error("toml::parse_floating: NaN value found" + " but the current environment does not support NaN. Please" + " make sure that the floating-point implementation conforms" + " IEEE 754/ISO 60559 international standard."); + } + } + str.erase(std::remove(str.begin(), str.end(), '_'), str.end()); + std::istringstream iss(str); + floating v(0.0); + iss >> v; + return ok(std::make_pair(v, token.unwrap())); + } + loc.reset(first); + return err(format_underline("toml::parse_floating: ", + {{source_location(loc), "the next token is not a float"}})); +} + +inline std::string read_utf8_codepoint(const region& reg, const location& loc) +{ + const auto str = reg.str().substr(1); + std::uint_least32_t codepoint; + std::istringstream iss(str); + iss >> std::hex >> codepoint; + + const auto to_char = [](const std::uint_least32_t i) noexcept -> char { + const auto uc = static_cast<unsigned char>(i); + return *reinterpret_cast<const char*>(std::addressof(uc)); + }; + + std::string character; + if(codepoint < 0x80) // U+0000 ... U+0079 ; just an ASCII. + { + character += static_cast<char>(codepoint); + } + else if(codepoint < 0x800) //U+0080 ... U+07FF + { + // 110yyyyx 10xxxxxx; 0x3f == 0b0011'1111 + character += to_char(0xC0| codepoint >> 6); + character += to_char(0x80|(codepoint & 0x3F)); + } + else if(codepoint < 0x10000) // U+0800...U+FFFF + { + if(0xD800 <= codepoint && codepoint <= 0xDFFF) + { + throw syntax_error(format_underline( + "toml::read_utf8_codepoint: codepoints in the range " + "[0xD800, 0xDFFF] are not valid UTF-8.", {{ + source_location(loc), "not a valid UTF-8 codepoint" + }}), source_location(loc)); + } + assert(codepoint < 0xD800 || 0xDFFF < codepoint); + // 1110yyyy 10yxxxxx 10xxxxxx + character += to_char(0xE0| codepoint >> 12); + character += to_char(0x80|(codepoint >> 6 & 0x3F)); + character += to_char(0x80|(codepoint & 0x3F)); + } + else if(codepoint < 0x110000) // U+010000 ... U+10FFFF + { + // 11110yyy 10yyxxxx 10xxxxxx 10xxxxxx + character += to_char(0xF0| codepoint >> 18); + character += to_char(0x80|(codepoint >> 12 & 0x3F)); + character += to_char(0x80|(codepoint >> 6 & 0x3F)); + character += to_char(0x80|(codepoint & 0x3F)); + } + else // out of UTF-8 region + { + throw syntax_error(format_underline("toml::read_utf8_codepoint:" + " input codepoint is too large.", + {{source_location(loc), "should be in [0x00..0x10FFFF]"}}), + source_location(loc)); + } + return character; +} + +inline result<std::string, std::string> parse_escape_sequence(location& loc) +{ + const auto first = loc.iter(); + if(first == loc.end() || *first != '\\') + { + return err(format_underline("toml::parse_escape_sequence: ", {{ + source_location(loc), "the next token is not a backslash \"\\\""}})); + } + loc.advance(); + switch(*loc.iter()) + { + case '\\':{loc.advance(); return ok(std::string("\\"));} + case '"' :{loc.advance(); return ok(std::string("\""));} + case 'b' :{loc.advance(); return ok(std::string("\b"));} + case 't' :{loc.advance(); return ok(std::string("\t"));} + case 'n' :{loc.advance(); return ok(std::string("\n"));} + case 'f' :{loc.advance(); return ok(std::string("\f"));} + case 'r' :{loc.advance(); return ok(std::string("\r"));} + case 'u' : + { + if(const auto token = lex_escape_unicode_short::invoke(loc)) + { + return ok(read_utf8_codepoint(token.unwrap(), loc)); + } + else + { + return err(format_underline("parse_escape_sequence: " + "invalid token found in UTF-8 codepoint uXXXX.", + {{source_location(loc), "here"}})); + } + } + case 'U': + { + if(const auto token = lex_escape_unicode_long::invoke(loc)) + { + return ok(read_utf8_codepoint(token.unwrap(), loc)); + } + else + { + return err(format_underline("parse_escape_sequence: " + "invalid token found in UTF-8 codepoint Uxxxxxxxx", + {{source_location(loc), "here"}})); + } + } + } + + const auto msg = format_underline("parse_escape_sequence: " + "unknown escape sequence appeared.", {{source_location(loc), + "escape sequence is one of \\, \", b, t, n, f, r, uxxxx, Uxxxxxxxx"}}, + /* Hints = */{"if you want to write backslash as just one backslash, " + "use literal string like: regex = '<\\i\\c*\\s*>'"}); + loc.reset(first); + return err(msg); +} + +inline std::ptrdiff_t check_utf8_validity(const std::string& reg) +{ + location loc("tmp", reg); + const auto u8 = repeat<lex_utf8_code, unlimited>::invoke(loc); + if(!u8 || loc.iter() != loc.end()) + { + const auto error_location = std::distance(loc.begin(), loc.iter()); + assert(0 <= error_location); + return error_location; + } + return -1; +} + +inline result<std::pair<toml::string, region>, std::string> +parse_ml_basic_string(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_ml_basic_string::invoke(loc)) + { + auto inner_loc = loc; + inner_loc.reset(first); + + std::string retval; + retval.reserve(token.unwrap().size()); + + auto delim = lex_ml_basic_string_open::invoke(inner_loc); + if(!delim) + { + throw internal_error(format_underline( + "parse_ml_basic_string: invalid token", + {{source_location(inner_loc), "should be \"\"\""}}), + source_location(inner_loc)); + } + // immediate newline is ignored (if exists) + /* discard return value */ lex_newline::invoke(inner_loc); + + delim = none(); + while(!delim) + { + using lex_unescaped_seq = repeat< + either<lex_ml_basic_unescaped, lex_newline>, unlimited>; + if(auto unescaped = lex_unescaped_seq::invoke(inner_loc)) + { + retval += unescaped.unwrap().str(); + } + if(auto escaped = parse_escape_sequence(inner_loc)) + { + retval += escaped.unwrap(); + } + if(auto esc_nl = lex_ml_basic_escaped_newline::invoke(inner_loc)) + { + // ignore newline after escape until next non-ws char + } + if(inner_loc.iter() == inner_loc.end()) + { + throw internal_error(format_underline( + "parse_ml_basic_string: unexpected end of region", + {{source_location(inner_loc), "not sufficient token"}}), + source_location(inner_loc)); + } + delim = lex_ml_basic_string_close::invoke(inner_loc); + } + // `lex_ml_basic_string_close` allows 3 to 5 `"`s to allow 1 or 2 `"`s + // at just before the delimiter. Here, we need to attach `"`s at the + // end of the string body, if it exists. + // For detail, see the definition of `lex_ml_basic_string_close`. + assert(std::all_of(delim.unwrap().first(), delim.unwrap().last(), + [](const char c) noexcept {return c == '\"';})); + switch(delim.unwrap().size()) + { + case 3: {break;} + case 4: {retval += "\""; break;} + case 5: {retval += "\"\""; break;} + default: + { + throw internal_error(format_underline( + "parse_ml_basic_string: closing delimiter has invalid length", + {{source_location(inner_loc), "end of this"}}), + source_location(inner_loc)); + } + } + + const auto err_loc = check_utf8_validity(token.unwrap().str()); + if(err_loc == -1) + { + return ok(std::make_pair(toml::string(retval), token.unwrap())); + } + else + { + inner_loc.reset(first); + inner_loc.advance(err_loc); + throw syntax_error(format_underline( + "parse_ml_basic_string: invalid utf8 sequence found", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + } + else + { + loc.reset(first); + return err(format_underline("toml::parse_ml_basic_string: " + "the next token is not a valid multiline string", + {{source_location(loc), "here"}})); + } +} + +inline result<std::pair<toml::string, region>, std::string> +parse_basic_string(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_basic_string::invoke(loc)) + { + auto inner_loc = loc; + inner_loc.reset(first); + + auto quot = lex_quotation_mark::invoke(inner_loc); + if(!quot) + { + throw internal_error(format_underline("parse_basic_string: " + "invalid token", {{source_location(inner_loc), "should be \""}}), + source_location(inner_loc)); + } + + std::string retval; + retval.reserve(token.unwrap().size()); + + quot = none(); + while(!quot) + { + using lex_unescaped_seq = repeat<lex_basic_unescaped, unlimited>; + if(auto unescaped = lex_unescaped_seq::invoke(inner_loc)) + { + retval += unescaped.unwrap().str(); + } + if(auto escaped = parse_escape_sequence(inner_loc)) + { + retval += escaped.unwrap(); + } + if(inner_loc.iter() == inner_loc.end()) + { + throw internal_error(format_underline( + "parse_basic_string: unexpected end of region", + {{source_location(inner_loc), "not sufficient token"}}), + source_location(inner_loc)); + } + quot = lex_quotation_mark::invoke(inner_loc); + } + + const auto err_loc = check_utf8_validity(token.unwrap().str()); + if(err_loc == -1) + { + return ok(std::make_pair(toml::string(retval), token.unwrap())); + } + else + { + inner_loc.reset(first); + inner_loc.advance(err_loc); + throw syntax_error(format_underline( + "parse_ml_basic_string: invalid utf8 sequence found", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + } + else + { + loc.reset(first); // rollback + return err(format_underline("toml::parse_basic_string: " + "the next token is not a valid string", + {{source_location(loc), "here"}})); + } +} + +inline result<std::pair<toml::string, region>, std::string> +parse_ml_literal_string(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_ml_literal_string::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + + const auto open = lex_ml_literal_string_open::invoke(inner_loc); + if(!open) + { + throw internal_error(format_underline( + "parse_ml_literal_string: invalid token", + {{source_location(inner_loc), "should be '''"}}), + source_location(inner_loc)); + } + // immediate newline is ignored (if exists) + /* discard return value */ lex_newline::invoke(inner_loc); + + const auto body = lex_ml_literal_body::invoke(inner_loc); + + const auto close = lex_ml_literal_string_close::invoke(inner_loc); + if(!close) + { + throw internal_error(format_underline( + "parse_ml_literal_string: invalid token", + {{source_location(inner_loc), "should be '''"}}), + source_location(inner_loc)); + } + // `lex_ml_literal_string_close` allows 3 to 5 `'`s to allow 1 or 2 `'`s + // at just before the delimiter. Here, we need to attach `'`s at the + // end of the string body, if it exists. + // For detail, see the definition of `lex_ml_basic_string_close`. + + std::string retval = body.unwrap().str(); + assert(std::all_of(close.unwrap().first(), close.unwrap().last(), + [](const char c) noexcept {return c == '\'';})); + switch(close.unwrap().size()) + { + case 3: {break;} + case 4: {retval += "'"; break;} + case 5: {retval += "''"; break;} + default: + { + throw internal_error(format_underline( + "parse_ml_literal_string: closing delimiter has invalid length", + {{source_location(inner_loc), "end of this"}}), + source_location(inner_loc)); + } + } + + const auto err_loc = check_utf8_validity(token.unwrap().str()); + if(err_loc == -1) + { + return ok(std::make_pair(toml::string(retval, toml::string_t::literal), + token.unwrap())); + } + else + { + inner_loc.reset(first); + inner_loc.advance(err_loc); + throw syntax_error(format_underline( + "parse_ml_basic_string: invalid utf8 sequence found", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + } + else + { + loc.reset(first); // rollback + return err(format_underline("toml::parse_ml_literal_string: " + "the next token is not a valid multiline literal string", + {{source_location(loc), "here"}})); + } +} + +inline result<std::pair<toml::string, region>, std::string> +parse_literal_string(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_literal_string::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + + const auto open = lex_apostrophe::invoke(inner_loc); + if(!open) + { + throw internal_error(format_underline( + "parse_literal_string: invalid token", + {{source_location(inner_loc), "should be '"}}), + source_location(inner_loc)); + } + + const auto body = repeat<lex_literal_char, unlimited>::invoke(inner_loc); + + const auto close = lex_apostrophe::invoke(inner_loc); + if(!close) + { + throw internal_error(format_underline( + "parse_literal_string: invalid token", + {{source_location(inner_loc), "should be '"}}), + source_location(inner_loc)); + } + + const auto err_loc = check_utf8_validity(token.unwrap().str()); + if(err_loc == -1) + { + return ok(std::make_pair( + toml::string(body.unwrap().str(), toml::string_t::literal), + token.unwrap())); + } + else + { + inner_loc.reset(first); + inner_loc.advance(err_loc); + throw syntax_error(format_underline( + "parse_ml_basic_string: invalid utf8 sequence found", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + } + else + { + loc.reset(first); // rollback + return err(format_underline("toml::parse_literal_string: " + "the next token is not a valid literal string", + {{source_location(loc), "here"}})); + } +} + +inline result<std::pair<toml::string, region>, std::string> +parse_string(location& loc) +{ + if(loc.iter() != loc.end() && *(loc.iter()) == '"') + { + if(loc.iter() + 1 != loc.end() && *(loc.iter() + 1) == '"' && + loc.iter() + 2 != loc.end() && *(loc.iter() + 2) == '"') + { + return parse_ml_basic_string(loc); + } + else + { + return parse_basic_string(loc); + } + } + else if(loc.iter() != loc.end() && *(loc.iter()) == '\'') + { + if(loc.iter() + 1 != loc.end() && *(loc.iter() + 1) == '\'' && + loc.iter() + 2 != loc.end() && *(loc.iter() + 2) == '\'') + { + return parse_ml_literal_string(loc); + } + else + { + return parse_literal_string(loc); + } + } + return err(format_underline("toml::parse_string: ", + {{source_location(loc), "the next token is not a string"}})); +} + +inline result<std::pair<local_date, region>, std::string> +parse_local_date(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_local_date::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + + const auto y = lex_date_fullyear::invoke(inner_loc); + if(!y || inner_loc.iter() == inner_loc.end() || *inner_loc.iter() != '-') + { + throw internal_error(format_underline( + "toml::parse_inner_local_date: invalid year format", + {{source_location(inner_loc), "should be `-`"}}), + source_location(inner_loc)); + } + inner_loc.advance(); + const auto m = lex_date_month::invoke(inner_loc); + if(!m || inner_loc.iter() == inner_loc.end() || *inner_loc.iter() != '-') + { + throw internal_error(format_underline( + "toml::parse_local_date: invalid month format", + {{source_location(inner_loc), "should be `-`"}}), + source_location(inner_loc)); + } + inner_loc.advance(); + const auto d = lex_date_mday::invoke(inner_loc); + if(!d) + { + throw internal_error(format_underline( + "toml::parse_local_date: invalid day format", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + + const auto year = static_cast<std::int16_t>(from_string<int>(y.unwrap().str(), 0)); + const auto month = static_cast<std::int8_t >(from_string<int>(m.unwrap().str(), 0)); + const auto day = static_cast<std::int8_t >(from_string<int>(d.unwrap().str(), 0)); + + // We briefly check whether the input date is valid or not. But here, we + // only check if the RFC3339 compliance. + // Actually there are several special date that does not exist, + // because of historical reasons, such as 1582/10/5-1582/10/14 (only in + // several countries). But here, we do not care about such a complicated + // rule. It makes the code complicated and there is only low probability + // that such a specific date is needed in practice. If someone need to + // validate date accurately, that means that the one need a specialized + // library for their purpose in a different layer. + { + const bool is_leap = (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)); + const auto max_day = (month == 2) ? (is_leap ? 29 : 28) : + ((month == 4 || month == 6 || month == 9 || month == 11) ? 30 : 31); + + if((month < 1 || 12 < month) || (day < 1 || max_day < day)) + { + throw syntax_error(format_underline("toml::parse_date: " + "invalid date: it does not conform RFC3339.", {{ + source_location(loc), "month should be 01-12, day should be" + " 01-28,29,30,31, depending on month/year." + }}), source_location(inner_loc)); + } + } + return ok(std::make_pair(local_date(year, static_cast<month_t>(month - 1), day), + token.unwrap())); + } + else + { + loc.reset(first); + return err(format_underline("toml::parse_local_date: ", + {{source_location(loc), "the next token is not a local_date"}})); + } +} + +inline result<std::pair<local_time, region>, std::string> +parse_local_time(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_local_time::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + + const auto h = lex_time_hour::invoke(inner_loc); + if(!h || inner_loc.iter() == inner_loc.end() || *inner_loc.iter() != ':') + { + throw internal_error(format_underline( + "toml::parse_local_time: invalid year format", + {{source_location(inner_loc), "should be `:`"}}), + source_location(inner_loc)); + } + inner_loc.advance(); + const auto m = lex_time_minute::invoke(inner_loc); + if(!m || inner_loc.iter() == inner_loc.end() || *inner_loc.iter() != ':') + { + throw internal_error(format_underline( + "toml::parse_local_time: invalid month format", + {{source_location(inner_loc), "should be `:`"}}), + source_location(inner_loc)); + } + inner_loc.advance(); + const auto s = lex_time_second::invoke(inner_loc); + if(!s) + { + throw internal_error(format_underline( + "toml::parse_local_time: invalid second format", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + + const int hour = from_string<int>(h.unwrap().str(), 0); + const int minute = from_string<int>(m.unwrap().str(), 0); + const int second = from_string<int>(s.unwrap().str(), 0); + + if((hour < 0 || 23 < hour) || (minute < 0 || 59 < minute) || + (second < 0 || 60 < second)) // it may be leap second + { + throw syntax_error(format_underline("toml::parse_time: " + "invalid time: it does not conform RFC3339.", {{ + source_location(loc), "hour should be 00-23, minute should be" + " 00-59, second should be 00-60 (depending on the leap" + " second rules.)"}}), source_location(inner_loc)); + } + + local_time time(hour, minute, second, 0, 0); + + const auto before_secfrac = inner_loc.iter(); + if(const auto secfrac = lex_time_secfrac::invoke(inner_loc)) + { + auto sf = secfrac.unwrap().str(); + sf.erase(sf.begin()); // sf.front() == '.' + switch(sf.size() % 3) + { + case 2: sf += '0'; break; + case 1: sf += "00"; break; + case 0: break; + default: break; + } + if(sf.size() >= 9) + { + time.millisecond = from_string<std::uint16_t>(sf.substr(0, 3), 0u); + time.microsecond = from_string<std::uint16_t>(sf.substr(3, 3), 0u); + time.nanosecond = from_string<std::uint16_t>(sf.substr(6, 3), 0u); + } + else if(sf.size() >= 6) + { + time.millisecond = from_string<std::uint16_t>(sf.substr(0, 3), 0u); + time.microsecond = from_string<std::uint16_t>(sf.substr(3, 3), 0u); + } + else if(sf.size() >= 3) + { + time.millisecond = from_string<std::uint16_t>(sf, 0u); + time.microsecond = 0u; + } + } + else + { + if(before_secfrac != inner_loc.iter()) + { + throw internal_error(format_underline( + "toml::parse_local_time: invalid subsecond format", + {{source_location(inner_loc), "here"}}), + source_location(inner_loc)); + } + } + return ok(std::make_pair(time, token.unwrap())); + } + else + { + loc.reset(first); + return err(format_underline("toml::parse_local_time: ", + {{source_location(loc), "the next token is not a local_time"}})); + } +} + +inline result<std::pair<local_datetime, region>, std::string> +parse_local_datetime(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_local_date_time::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + const auto date = parse_local_date(inner_loc); + if(!date || inner_loc.iter() == inner_loc.end()) + { + throw internal_error(format_underline( + "toml::parse_local_datetime: invalid datetime format", + {{source_location(inner_loc), "date, not datetime"}}), + source_location(inner_loc)); + } + const char delim = *(inner_loc.iter()); + if(delim != 'T' && delim != 't' && delim != ' ') + { + throw internal_error(format_underline( + "toml::parse_local_datetime: invalid datetime format", + {{source_location(inner_loc), "should be `T` or ` ` (space)"}}), + source_location(inner_loc)); + } + inner_loc.advance(); + const auto time = parse_local_time(inner_loc); + if(!time) + { + throw internal_error(format_underline( + "toml::parse_local_datetime: invalid datetime format", + {{source_location(inner_loc), "invalid time format"}}), + source_location(inner_loc)); + } + return ok(std::make_pair( + local_datetime(date.unwrap().first, time.unwrap().first), + token.unwrap())); + } + else + { + loc.reset(first); + return err(format_underline("toml::parse_local_datetime: ", + {{source_location(loc), "the next token is not a local_datetime"}})); + } +} + +inline result<std::pair<offset_datetime, region>, std::string> +parse_offset_datetime(location& loc) +{ + const auto first = loc.iter(); + if(const auto token = lex_offset_date_time::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + const auto datetime = parse_local_datetime(inner_loc); + if(!datetime || inner_loc.iter() == inner_loc.end()) + { + throw internal_error(format_underline( + "toml::parse_offset_datetime: invalid datetime format", + {{source_location(inner_loc), "date, not datetime"}}), + source_location(inner_loc)); + } + time_offset offset(0, 0); + if(const auto ofs = lex_time_numoffset::invoke(inner_loc)) + { + const auto str = ofs.unwrap().str(); + + const auto hour = from_string<int>(str.substr(1,2), 0); + const auto minute = from_string<int>(str.substr(4,2), 0); + + if((hour < 0 || 23 < hour) || (minute < 0 || 59 < minute)) + { + throw syntax_error(format_underline("toml::parse_offset_datetime: " + "invalid offset: it does not conform RFC3339.", {{ + source_location(loc), "month should be 01-12, day should be" + " 01-28,29,30,31, depending on month/year." + }}), source_location(inner_loc)); + } + + if(str.front() == '+') + { + offset = time_offset(hour, minute); + } + else + { + offset = time_offset(-hour, -minute); + } + } + else if(*inner_loc.iter() != 'Z' && *inner_loc.iter() != 'z') + { + throw internal_error(format_underline( + "toml::parse_offset_datetime: invalid datetime format", + {{source_location(inner_loc), "should be `Z` or `+HH:MM`"}}), + source_location(inner_loc)); + } + return ok(std::make_pair(offset_datetime(datetime.unwrap().first, offset), + token.unwrap())); + } + else + { + loc.reset(first); + return err(format_underline("toml::parse_offset_datetime: ", + {{source_location(loc), "the next token is not a offset_datetime"}})); + } +} + +inline result<std::pair<key, region>, std::string> +parse_simple_key(location& loc) +{ + if(const auto bstr = parse_basic_string(loc)) + { + return ok(std::make_pair(bstr.unwrap().first.str, bstr.unwrap().second)); + } + if(const auto lstr = parse_literal_string(loc)) + { + return ok(std::make_pair(lstr.unwrap().first.str, lstr.unwrap().second)); + } + if(const auto bare = lex_unquoted_key::invoke(loc)) + { + const auto reg = bare.unwrap(); + return ok(std::make_pair(reg.str(), reg)); + } + return err(format_underline("toml::parse_simple_key: ", + {{source_location(loc), "the next token is not a simple key"}})); +} + +// dotted key become vector of keys +inline result<std::pair<std::vector<key>, region>, std::string> +parse_key(location& loc) +{ + const auto first = loc.iter(); + // dotted key -> `foo.bar.baz` where several single keys are chained by + // dots. Whitespaces between keys and dots are allowed. + if(const auto token = lex_dotted_key::invoke(loc)) + { + const auto reg = token.unwrap(); + location inner_loc(loc.name(), reg.str()); + std::vector<key> keys; + + while(inner_loc.iter() != inner_loc.end()) + { + lex_ws::invoke(inner_loc); + if(const auto k = parse_simple_key(inner_loc)) + { + keys.push_back(k.unwrap().first); + } + else + { + throw internal_error(format_underline( + "toml::detail::parse_key: dotted key contains invalid key", + {{source_location(inner_loc), k.unwrap_err()}}), + source_location(inner_loc)); + } + + lex_ws::invoke(inner_loc); + if(inner_loc.iter() == inner_loc.end()) + { + break; + } + else if(*inner_loc.iter() == '.') + { + inner_loc.advance(); // to skip `.` + } + else + { + throw internal_error(format_underline("toml::parse_key: " + "dotted key contains invalid key ", + {{source_location(inner_loc), "should be `.`"}}), + source_location(inner_loc)); + } + } + return ok(std::make_pair(keys, reg)); + } + loc.reset(first); + + // simple_key: a single (basic_string|literal_string|bare key) + if(const auto smpl = parse_simple_key(loc)) + { + return ok(std::make_pair(std::vector<key>(1, smpl.unwrap().first), + smpl.unwrap().second)); + } + return err(format_underline("toml::parse_key: an invalid key appeared.", + {{source_location(loc), "is not a valid key"}}, { + "bare keys : non-empty strings composed only of [A-Za-z0-9_-].", + "quoted keys: same as \"basic strings\" or 'literal strings'.", + "dotted keys: sequence of bare or quoted keys joined with a dot." + })); +} + +// forward-decl to implement parse_array and parse_table +template<typename Value> +result<Value, std::string> parse_value(location&); + +template<typename Value> +result<std::pair<typename Value::array_type, region>, std::string> +parse_array(location& loc) +{ + using value_type = Value; + using array_type = typename value_type::array_type; + + const auto first = loc.iter(); + if(loc.iter() == loc.end()) + { + return err("toml::parse_array: input is empty"); + } + if(*loc.iter() != '[') + { + return err("toml::parse_array: token is not an array"); + } + loc.advance(); + + using lex_ws_comment_newline = repeat< + either<lex_wschar, lex_newline, lex_comment>, unlimited>; + + array_type retval; + while(loc.iter() != loc.end()) + { + lex_ws_comment_newline::invoke(loc); // skip + + if(loc.iter() != loc.end() && *loc.iter() == ']') + { + loc.advance(); // skip ']' + return ok(std::make_pair(retval, + region(loc, first, loc.iter()))); + } + + if(auto val = parse_value<value_type>(loc)) + { + // After TOML v1.0.0-rc.1, array becomes to be able to have values + // with different types. So here we will omit this by default. + // + // But some of the test-suite checks if the parser accepts a hetero- + // geneous arrays, so we keep this for a while. +#ifdef TOML11_DISALLOW_HETEROGENEOUS_ARRAYS + if(!retval.empty() && retval.front().type() != val.as_ok().type()) + { + auto array_start_loc = loc; + array_start_loc.reset(first); + + throw syntax_error(format_underline("toml::parse_array: " + "type of elements should be the same each other.", { + {source_location(array_start_loc), "array starts here"}, + { + retval.front().location(), + "value has type " + stringize(retval.front().type()) + }, + { + val.unwrap().location(), + "value has different type, " + stringize(val.unwrap().type()) + } + }), source_location(loc)); + } +#endif + retval.push_back(std::move(val.unwrap())); + } + else + { + auto array_start_loc = loc; + array_start_loc.reset(first); + + throw syntax_error(format_underline("toml::parse_array: " + "value having invalid format appeared in an array", { + {source_location(array_start_loc), "array starts here"}, + {source_location(loc), "it is not a valid value."} + }), source_location(loc)); + } + + using lex_array_separator = sequence<maybe<lex_ws_comment_newline>, character<','>>; + const auto sp = lex_array_separator::invoke(loc); + if(!sp) + { + lex_ws_comment_newline::invoke(loc); + if(loc.iter() != loc.end() && *loc.iter() == ']') + { + loc.advance(); // skip ']' + return ok(std::make_pair(retval, + region(loc, first, loc.iter()))); + } + else + { + auto array_start_loc = loc; + array_start_loc.reset(first); + + throw syntax_error(format_underline("toml::parse_array:" + " missing array separator `,` after a value", { + {source_location(array_start_loc), "array starts here"}, + {source_location(loc), "should be `,`"} + }), source_location(loc)); + } + } + } + loc.reset(first); + throw syntax_error(format_underline("toml::parse_array: " + "array did not closed by `]`", + {{source_location(loc), "should be closed"}}), + source_location(loc)); +} + +template<typename Value> +result<std::pair<std::pair<std::vector<key>, region>, Value>, std::string> +parse_key_value_pair(location& loc) +{ + using value_type = Value; + + const auto first = loc.iter(); + auto key_reg = parse_key(loc); + if(!key_reg) + { + std::string msg = std::move(key_reg.unwrap_err()); + // if the next token is keyvalue-separator, it means that there are no + // key. then we need to show error as "empty key is not allowed". + if(const auto keyval_sep = lex_keyval_sep::invoke(loc)) + { + loc.reset(first); + msg = format_underline("toml::parse_key_value_pair: " + "empty key is not allowed.", + {{source_location(loc), "key expected before '='"}}); + } + return err(std::move(msg)); + } + + const auto kvsp = lex_keyval_sep::invoke(loc); + if(!kvsp) + { + std::string msg; + // if the line contains '=' after the invalid sequence, possibly the + // error is in the key (like, invalid character in bare key). + const auto line_end = std::find(loc.iter(), loc.end(), '\n'); + if(std::find(loc.iter(), line_end, '=') != line_end) + { + msg = format_underline("toml::parse_key_value_pair: " + "invalid format for key", + {{source_location(loc), "invalid character in key"}}, + {"Did you forget '.' to separate dotted-key?", + "Allowed characters for bare key are [0-9a-zA-Z_-]."}); + } + else // if not, the error is lack of key-value separator. + { + msg = format_underline("toml::parse_key_value_pair: " + "missing key-value separator `=`", + {{source_location(loc), "should be `=`"}}); + } + loc.reset(first); + return err(std::move(msg)); + } + + const auto after_kvsp = loc.iter(); // err msg + auto val = parse_value<value_type>(loc); + if(!val) + { + std::string msg; + loc.reset(after_kvsp); + // check there is something not a comment/whitespace after `=` + if(sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>::invoke(loc)) + { + loc.reset(after_kvsp); + msg = format_underline("toml::parse_key_value_pair: " + "missing value after key-value separator '='", + {{source_location(loc), "expected value, but got nothing"}}); + } + else // there is something not a comment/whitespace, so invalid format. + { + msg = std::move(val.unwrap_err()); + } + loc.reset(first); + return err(msg); + } + return ok(std::make_pair(std::move(key_reg.unwrap()), + std::move(val.unwrap()))); +} + +// for error messages. +template<typename InputIterator> +std::string format_dotted_keys(InputIterator first, const InputIterator last) +{ + static_assert(std::is_same<key, + typename std::iterator_traits<InputIterator>::value_type>::value,""); + + std::string retval(*first++); + for(; first != last; ++first) + { + retval += '.'; + retval += *first; + } + return retval; +} + +// forward decl for is_valid_forward_table_definition +result<std::pair<std::vector<key>, region>, std::string> +parse_table_key(location& loc); +template<typename Value> +result<std::pair<typename Value::table_type, region>, std::string> +parse_inline_table(location& loc); + +// The following toml file is allowed. +// ```toml +// [a.b.c] # here, table `a` has element `b`. +// foo = "bar" +// [a] # merge a = {baz = "qux"} to a = {b = {...}} +// baz = "qux" +// ``` +// But the following is not allowed. +// ```toml +// [a] +// b.c.foo = "bar" +// [a] # error! the same table [a] defined! +// baz = "qux" +// ``` +// The following is neither allowed. +// ```toml +// a = { b.c.foo = "bar"} +// [a] # error! the same table [a] defined! +// baz = "qux" +// ``` +// Here, it parses region of `tab->at(k)` as a table key and check the depth +// of the key. If the key region points deeper node, it would be allowed. +// Otherwise, the key points the same node. It would be rejected. +template<typename Value, typename Iterator> +bool is_valid_forward_table_definition(const Value& fwd, const Value& inserting, + Iterator key_first, Iterator key_curr, Iterator key_last) +{ + // ------------------------------------------------------------------------ + // check type of the value to be inserted/merged + + std::string inserting_reg = ""; + if(const auto ptr = detail::get_region(inserting)) + { + inserting_reg = ptr->str(); + } + location inserting_def("internal", std::move(inserting_reg)); + if(const auto inlinetable = parse_inline_table<Value>(inserting_def)) + { + // check if we are overwriting existing table. + // ```toml + // # NG + // a.b = 42 + // a = {d = 3.14} + // ``` + // Inserting an inline table to a existing super-table is not allowed in + // any case. If we found it, we can reject it without further checking. + return false; + } + + // ------------------------------------------------------------------------ + // check table defined before + + std::string internal = ""; + if(const auto ptr = detail::get_region(fwd)) + { + internal = ptr->str(); + } + location def("internal", std::move(internal)); + if(const auto tabkeys = parse_table_key(def)) // [table.key] + { + // table keys always contains all the nodes from the root. + const auto& tks = tabkeys.unwrap().first; + if(std::size_t(std::distance(key_first, key_last)) == tks.size() && + std::equal(tks.begin(), tks.end(), key_first)) + { + // the keys are equivalent. it is not allowed. + return false; + } + // the keys are not equivalent. it is allowed. + return true; + } + if(const auto dotkeys = parse_key(def)) + { + // consider the following case. + // [a] + // b.c = {d = 42} + // [a.b.c] + // e = 2.71 + // this defines the table [a.b.c] twice. no? + + // a dotted key starts from the node representing a table in which the + // dotted key belongs to. + const auto& dks = dotkeys.unwrap().first; + if(std::size_t(std::distance(key_curr, key_last)) == dks.size() && + std::equal(dks.begin(), dks.end(), key_curr)) + { + // the keys are equivalent. it is not allowed. + return false; + } + // the keys are not equivalent. it is allowed. + return true; + } + return false; +} + +template<typename Value, typename InputIterator> +result<bool, std::string> +insert_nested_key(typename Value::table_type& root, const Value& v, + InputIterator iter, const InputIterator last, + region key_reg, + const bool is_array_of_table = false) +{ + static_assert(std::is_same<key, + typename std::iterator_traits<InputIterator>::value_type>::value,""); + + using value_type = Value; + using table_type = typename value_type::table_type; + using array_type = typename value_type::array_type; + + const auto first = iter; + assert(iter != last); + + table_type* tab = std::addressof(root); + for(; iter != last; ++iter) // search recursively + { + const key& k = *iter; + if(std::next(iter) == last) // k is the last key + { + // XXX if the value is array-of-tables, there can be several + // tables that are in the same array. in that case, we need to + // find the last element and insert it to there. + if(is_array_of_table) + { + if(tab->count(k) == 1) // there is already an array of table + { + if(tab->at(k).is_table()) + { + // show special err msg for conflicting table + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: array of table (\"", + format_dotted_keys(first, last), + "\") cannot be defined"), { + {tab->at(k).location(), "table already defined"}, + {v.location(), "this conflicts with the previous table"} + }), v.location()); + } + else if(!(tab->at(k).is_array())) + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: array of table (\"", + format_dotted_keys(first, last), "\") collides with" + " existing value"), { + {tab->at(k).location(), + concat_to_string("this ", tab->at(k).type(), + " value already exists")}, + {v.location(), + "while inserting this array-of-tables"} + }), v.location()); + } + // the above if-else-if checks tab->at(k) is an array + auto& a = tab->at(k).as_array(); + // If table element is defined as [[array_of_tables]], it + // cannot be an empty array. If an array of tables is + // defined as `aot = []`, it cannot be appended. + if(a.empty() || !(a.front().is_table())) + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: array of table (\"", + format_dotted_keys(first, last), "\") collides with" + " existing value"), { + {tab->at(k).location(), + concat_to_string("this ", tab->at(k).type(), + " value already exists")}, + {v.location(), + "while inserting this array-of-tables"} + }), v.location()); + } + // avoid conflicting array of table like the following. + // ```toml + // a = [{b = 42}] # define a as an array of *inline* tables + // [[a]] # a is an array of *multi-line* tables + // b = 54 + // ``` + // Here, from the type information, these cannot be detected + // because inline table is also a table. + // But toml v0.5.0 explicitly says it is invalid. The above + // array-of-tables has a static size and appending to the + // array is invalid. + // In this library, multi-line table value has a region + // that points to the key of the table (e.g. [[a]]). By + // comparing the first two letters in key, we can detect + // the array-of-table is inline or multiline. + if(const auto ptr = detail::get_region(a.front())) + { + if(ptr->str().substr(0,2) != "[[") + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: array of table (\"", + format_dotted_keys(first, last), "\") collides " + "with existing array-of-tables"), { + {tab->at(k).location(), + concat_to_string("this ", tab->at(k).type(), + " value has static size")}, + {v.location(), + "appending it to the statically sized array"} + }), v.location()); + } + } + a.push_back(v); + return ok(true); + } + else // if not, we need to create the array of table + { + // XXX: Consider the following array of tables. + // ```toml + // # This is a comment. + // [[aot]] + // foo = "bar" + // ``` + // Here, the comment is for `aot`. But here, actually two + // values are defined. An array that contains tables, named + // `aot`, and the 0th element of the `aot`, `{foo = "bar"}`. + // Those two are different from each other. But both of them + // points to the same portion of the TOML file, `[[aot]]`, + // so `key_reg.comments()` returns `# This is a comment`. + // If it is assigned as a comment of `aot` defined here, the + // comment will be duplicated. Both the `aot` itself and + // the 0-th element will have the same comment. This causes + // "duplication of the same comments" bug when the data is + // serialized. + // Next, consider the following. + // ```toml + // # comment 1 + // aot = [ + // # comment 2 + // {foo = "bar"}, + // ] + // ``` + // In this case, we can distinguish those two comments. So + // here we need to add "comment 1" to the `aot` and + // "comment 2" to the 0th element of that. + // To distinguish those two, we check the key region. + std::vector<std::string> comments{/* empty by default */}; + if(key_reg.str().substr(0, 2) != "[[") + { + comments = key_reg.comments(); + } + value_type aot(array_type(1, v), key_reg, std::move(comments)); + tab->insert(std::make_pair(k, aot)); + return ok(true); + } + } // end if(array of table) + + if(tab->count(k) == 1) + { + if(tab->at(k).is_table() && v.is_table()) + { + if(!is_valid_forward_table_definition( + tab->at(k), v, first, iter, last)) + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: table (\"", + format_dotted_keys(first, last), + "\") already exists."), { + {tab->at(k).location(), "table already exists here"}, + {v.location(), "table defined twice"} + }), v.location()); + } + // to allow the following toml file. + // [a.b.c] + // d = 42 + // [a] + // e = 2.71 + auto& t = tab->at(k).as_table(); + for(const auto& kv : v.as_table()) + { + if(tab->at(k).contains(kv.first)) + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: value (\"", + format_dotted_keys(first, last), + "\") already exists."), { + {t.at(kv.first).location(), "already exists here"}, + {v.location(), "this defined twice"} + }), v.location()); + } + t[kv.first] = kv.second; + } + detail::change_region(tab->at(k), key_reg); + return ok(true); + } + else if(v.is_table() && + tab->at(k).is_array() && + tab->at(k).as_array().size() > 0 && + tab->at(k).as_array().front().is_table()) + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: array of tables (\"", + format_dotted_keys(first, last), "\") already exists."), { + {tab->at(k).location(), "array of tables defined here"}, + {v.location(), "table conflicts with the previous array of table"} + }), v.location()); + } + else + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: value (\"", + format_dotted_keys(first, last), "\") already exists."), { + {tab->at(k).location(), "value already exists here"}, + {v.location(), "value defined twice"} + }), v.location()); + } + } + tab->insert(std::make_pair(k, v)); + return ok(true); + } + else // k is not the last one, we should insert recursively + { + // if there is no corresponding value, insert it first. + // related: you don't need to write + // # [x] + // # [x.y] + // to write + // [x.y.z] + if(tab->count(k) == 0) + { + // a table that is defined implicitly doesn't have any comments. + (*tab)[k] = value_type(table_type{}, key_reg, {/*no comment*/}); + } + + // type checking... + if(tab->at(k).is_table()) + { + // According to toml-lang/toml:36d3091b3 "Clarify that inline + // tables are immutable", check if it adds key-value pair to an + // inline table. + if(const auto* ptr = get_region(tab->at(k))) + { + // here, if the value is a (multi-line) table, the region + // should be something like `[table-name]`. + if(ptr->front() == '{') + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: inserting to an inline table (", + format_dotted_keys(first, std::next(iter)), + ") but inline tables are immutable"), { + {tab->at(k).location(), "inline tables are immutable"}, + {v.location(), "inserting this"} + }), v.location()); + } + } + tab = std::addressof((*tab)[k].as_table()); + } + else if(tab->at(k).is_array()) // inserting to array-of-tables? + { + auto& a = (*tab)[k].as_array(); + if(!a.back().is_table()) + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: target (", + format_dotted_keys(first, std::next(iter)), + ") is neither table nor an array of tables"), { + {a.back().location(), concat_to_string( + "actual type is ", a.back().type())}, + {v.location(), "inserting this"} + }), v.location()); + } + tab = std::addressof(a.back().as_table()); + } + else + { + throw syntax_error(format_underline(concat_to_string( + "toml::insert_value: target (", + format_dotted_keys(first, std::next(iter)), + ") is neither table nor an array of tables"), { + {tab->at(k).location(), concat_to_string( + "actual type is ", tab->at(k).type())}, + {v.location(), "inserting this"} + }), v.location()); + } + } + } + return err(std::string("toml::detail::insert_nested_key: never reach here")); +} + +template<typename Value> +result<std::pair<typename Value::table_type, region>, std::string> +parse_inline_table(location& loc) +{ + using value_type = Value; + using table_type = typename value_type::table_type; + + const auto first = loc.iter(); + table_type retval; + if(!(loc.iter() != loc.end() && *loc.iter() == '{')) + { + return err(format_underline("toml::parse_inline_table: ", + {{source_location(loc), "the next token is not an inline table"}})); + } + loc.advance(); + + // check if the inline table is an empty table = { } + maybe<lex_ws>::invoke(loc); + if(loc.iter() != loc.end() && *loc.iter() == '}') + { + loc.advance(); // skip `}` + return ok(std::make_pair(retval, region(loc, first, loc.iter()))); + } + + // it starts from "{". it should be formatted as inline-table + while(loc.iter() != loc.end()) + { + const auto kv_r = parse_key_value_pair<value_type>(loc); + if(!kv_r) + { + return err(kv_r.unwrap_err()); + } + + const auto& kvpair = kv_r.unwrap(); + const std::vector<key>& keys = kvpair.first.first; + const auto& key_reg = kvpair.first.second; + const value_type& val = kvpair.second; + + const auto inserted = + insert_nested_key(retval, val, keys.begin(), keys.end(), key_reg); + if(!inserted) + { + throw internal_error("toml::parse_inline_table: " + "failed to insert value into table: " + inserted.unwrap_err(), + source_location(loc)); + } + + using lex_table_separator = sequence<maybe<lex_ws>, character<','>>; + const auto sp = lex_table_separator::invoke(loc); + + if(!sp) + { + maybe<lex_ws>::invoke(loc); + + if(loc.iter() == loc.end()) + { + throw syntax_error(format_underline( + "toml::parse_inline_table: missing table separator `}` ", + {{source_location(loc), "should be `}`"}}), + source_location(loc)); + } + else if(*loc.iter() == '}') + { + loc.advance(); // skip `}` + return ok(std::make_pair( + retval, region(loc, first, loc.iter()))); + } + else if(*loc.iter() == '#' || *loc.iter() == '\r' || *loc.iter() == '\n') + { + throw syntax_error(format_underline( + "toml::parse_inline_table: missing curly brace `}`", + {{source_location(loc), "should be `}`"}}), + source_location(loc)); + } + else + { + throw syntax_error(format_underline( + "toml::parse_inline_table: missing table separator `,` ", + {{source_location(loc), "should be `,`"}}), + source_location(loc)); + } + } + else // `,` is found + { + maybe<lex_ws>::invoke(loc); + if(loc.iter() != loc.end() && *loc.iter() == '}') + { + throw syntax_error(format_underline( + "toml::parse_inline_table: trailing comma is not allowed in" + " an inline table", + {{source_location(loc), "should be `}`"}}), + source_location(loc)); + } + } + } + loc.reset(first); + throw syntax_error(format_underline("toml::parse_inline_table: " + "inline table did not closed by `}`", + {{source_location(loc), "should be closed"}}), + source_location(loc)); +} + +inline result<value_t, std::string> guess_number_type(const location& l) +{ + // This function tries to find some (common) mistakes by checking characters + // that follows the last character of a value. But it is often difficult + // because some non-newline characters can appear after a value. E.g. + // spaces, tabs, commas (in an array or inline table), closing brackets + // (of an array or inline table), comment-sign (#). Since this function + // does not parse further, those characters are always allowed to be there. + location loc = l; + + if(lex_offset_date_time::invoke(loc)) {return ok(value_t::offset_datetime);} + loc.reset(l.iter()); + + if(lex_local_date_time::invoke(loc)) + { + // bad offset may appear after this. + if(loc.iter() != loc.end() && (*loc.iter() == '+' || *loc.iter() == '-' + || *loc.iter() == 'Z' || *loc.iter() == 'z')) + { + return err(format_underline("bad offset: should be [+-]HH:MM or Z", + {{source_location(loc), "[+-]HH:MM or Z"}}, + {"pass: +09:00, -05:30", "fail: +9:00, -5:30"})); + } + return ok(value_t::local_datetime); + } + loc.reset(l.iter()); + + if(lex_local_date::invoke(loc)) + { + // bad time may appear after this. + // A space is allowed as a delimiter between local time. But there are + // both cases in which a space becomes valid or invalid. + // - invalid: 2019-06-16 7:00:00 + // - valid : 2019-06-16 07:00:00 + if(loc.iter() != loc.end()) + { + const auto c = *loc.iter(); + if(c == 'T' || c == 't') + { + return err(format_underline("bad time: should be HH:MM:SS.subsec", + {{source_location(loc), "HH:MM:SS.subsec"}}, + {"pass: 1979-05-27T07:32:00, 1979-05-27 07:32:00.999999", + "fail: 1979-05-27T7:32:00, 1979-05-27 17:32"})); + } + if('0' <= c && c <= '9') + { + return err(format_underline("bad time: missing T", + {{source_location(loc), "T or space required here"}}, + {"pass: 1979-05-27T07:32:00, 1979-05-27 07:32:00.999999", + "fail: 1979-05-27T7:32:00, 1979-05-27 7:32"})); + } + if(c == ' ' && std::next(loc.iter()) != loc.end() && + ('0' <= *std::next(loc.iter()) && *std::next(loc.iter())<= '9')) + { + loc.advance(); + return err(format_underline("bad time: should be HH:MM:SS.subsec", + {{source_location(loc), "HH:MM:SS.subsec"}}, + {"pass: 1979-05-27T07:32:00, 1979-05-27 07:32:00.999999", + "fail: 1979-05-27T7:32:00, 1979-05-27 7:32"})); + } + } + return ok(value_t::local_date); + } + loc.reset(l.iter()); + + if(lex_local_time::invoke(loc)) {return ok(value_t::local_time);} + loc.reset(l.iter()); + + if(lex_float::invoke(loc)) + { + if(loc.iter() != loc.end() && *loc.iter() == '_') + { + return err(format_underline("bad float: `_` should be surrounded by digits", + {{source_location(loc), "here"}}, + {"pass: +1.0, -2e-2, 3.141_592_653_589, inf, nan", + "fail: .0, 1., _1.0, 1.0_, 1_.0, 1.0__0"})); + } + return ok(value_t::floating); + } + loc.reset(l.iter()); + + if(lex_integer::invoke(loc)) + { + if(loc.iter() != loc.end()) + { + const auto c = *loc.iter(); + if(c == '_') + { + return err(format_underline("bad integer: `_` should be surrounded by digits", + {{source_location(loc), "here"}}, + {"pass: -42, 1_000, 1_2_3_4_5, 0xC0FFEE, 0b0010, 0o755", + "fail: 1__000, 0123"})); + } + if('0' <= c && c <= '9') + { + // leading zero. point '0' + loc.retrace(); + return err(format_underline("bad integer: leading zero", + {{source_location(loc), "here"}}, + {"pass: -42, 1_000, 1_2_3_4_5, 0xC0FFEE, 0b0010, 0o755", + "fail: 1__000, 0123"})); + } + if(c == ':' || c == '-') + { + return err(format_underline("bad datetime: invalid format", + {{source_location(loc), "here"}}, + {"pass: 1979-05-27T07:32:00-07:00, 1979-05-27 07:32:00.999999Z", + "fail: 1979-05-27T7:32:00-7:00, 1979-05-27 7:32-00:30"})); + } + if(c == '.' || c == 'e' || c == 'E') + { + return err(format_underline("bad float: invalid format", + {{source_location(loc), "here"}}, + {"pass: +1.0, -2e-2, 3.141_592_653_589, inf, nan", + "fail: .0, 1., _1.0, 1.0_, 1_.0, 1.0__0"})); + } + } + return ok(value_t::integer); + } + if(loc.iter() != loc.end() && *loc.iter() == '.') + { + return err(format_underline("bad float: invalid format", + {{source_location(loc), "integer part required before this"}}, + {"pass: +1.0, -2e-2, 3.141_592_653_589, inf, nan", + "fail: .0, 1., _1.0, 1.0_, 1_.0, 1.0__0"})); + } + if(loc.iter() != loc.end() && *loc.iter() == '_') + { + return err(format_underline("bad number: `_` should be surrounded by digits", + {{source_location(loc), "`_` is not surrounded by digits"}}, + {"pass: -42, 1_000, 1_2_3_4_5, 0xC0FFEE, 0b0010, 0o755", + "fail: 1__000, 0123"})); + } + return err(format_underline("bad format: unknown value appeared", + {{source_location(loc), "here"}})); +} + +inline result<value_t, std::string> guess_value_type(const location& loc) +{ + switch(*loc.iter()) + { + case '"' : {return ok(value_t::string); } + case '\'': {return ok(value_t::string); } + case 't' : {return ok(value_t::boolean); } + case 'f' : {return ok(value_t::boolean); } + case '[' : {return ok(value_t::array); } + case '{' : {return ok(value_t::table); } + case 'i' : {return ok(value_t::floating);} // inf. + case 'n' : {return ok(value_t::floating);} // nan. + default : {return guess_number_type(loc);} + } +} + +template<typename Value, typename T> +result<Value, std::string> +parse_value_helper(result<std::pair<T, region>, std::string> rslt) +{ + if(rslt.is_ok()) + { + auto comments = rslt.as_ok().second.comments(); + return ok(Value(std::move(rslt.as_ok()), std::move(comments))); + } + else + { + return err(std::move(rslt.as_err())); + } +} + +template<typename Value> +result<Value, std::string> parse_value(location& loc) +{ + const auto first = loc.iter(); + if(first == loc.end()) + { + return err(format_underline("toml::parse_value: input is empty", + {{source_location(loc), ""}})); + } + + const auto type = guess_value_type(loc); + if(!type) + { + return err(type.unwrap_err()); + } + + switch(type.unwrap()) + { + case value_t::boolean : {return parse_value_helper<Value>(parse_boolean(loc) );} + case value_t::integer : {return parse_value_helper<Value>(parse_integer(loc) );} + case value_t::floating : {return parse_value_helper<Value>(parse_floating(loc) );} + case value_t::string : {return parse_value_helper<Value>(parse_string(loc) );} + case value_t::offset_datetime: {return parse_value_helper<Value>(parse_offset_datetime(loc) );} + case value_t::local_datetime : {return parse_value_helper<Value>(parse_local_datetime(loc) );} + case value_t::local_date : {return parse_value_helper<Value>(parse_local_date(loc) );} + case value_t::local_time : {return parse_value_helper<Value>(parse_local_time(loc) );} + case value_t::array : {return parse_value_helper<Value>(parse_array<Value>(loc) );} + case value_t::table : {return parse_value_helper<Value>(parse_inline_table<Value>(loc));} + default: + { + const auto msg = format_underline("toml::parse_value: " + "unknown token appeared", {{source_location(loc), "unknown"}}); + loc.reset(first); + return err(msg); + } + } +} + +inline result<std::pair<std::vector<key>, region>, std::string> +parse_table_key(location& loc) +{ + if(auto token = lex_std_table::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + + const auto open = lex_std_table_open::invoke(inner_loc); + if(!open || inner_loc.iter() == inner_loc.end()) + { + throw internal_error(format_underline( + "toml::parse_table_key: no `[`", + {{source_location(inner_loc), "should be `[`"}}), + source_location(inner_loc)); + } + // to skip [ a . b . c ] + // ^----------- this whitespace + lex_ws::invoke(inner_loc); + const auto keys = parse_key(inner_loc); + if(!keys) + { + throw internal_error(format_underline( + "toml::parse_table_key: invalid key", + {{source_location(inner_loc), "not key"}}), + source_location(inner_loc)); + } + // to skip [ a . b . c ] + // ^-- this whitespace + lex_ws::invoke(inner_loc); + const auto close = lex_std_table_close::invoke(inner_loc); + if(!close) + { + throw internal_error(format_underline( + "toml::parse_table_key: no `]`", + {{source_location(inner_loc), "should be `]`"}}), + source_location(inner_loc)); + } + + // after [table.key], newline or EOF(empty table) required. + if(loc.iter() != loc.end()) + { + using lex_newline_after_table_key = + sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>; + const auto nl = lex_newline_after_table_key::invoke(loc); + if(!nl) + { + throw syntax_error(format_underline( + "toml::parse_table_key: newline required after [table.key]", + {{source_location(loc), "expected newline"}}), + source_location(loc)); + } + } + return ok(std::make_pair(keys.unwrap().first, token.unwrap())); + } + else + { + return err(format_underline("toml::parse_table_key: " + "not a valid table key", {{source_location(loc), "here"}})); + } +} + +inline result<std::pair<std::vector<key>, region>, std::string> +parse_array_table_key(location& loc) +{ + if(auto token = lex_array_table::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + + const auto open = lex_array_table_open::invoke(inner_loc); + if(!open || inner_loc.iter() == inner_loc.end()) + { + throw internal_error(format_underline( + "toml::parse_array_table_key: no `[[`", + {{source_location(inner_loc), "should be `[[`"}}), + source_location(inner_loc)); + } + lex_ws::invoke(inner_loc); + const auto keys = parse_key(inner_loc); + if(!keys) + { + throw internal_error(format_underline( + "toml::parse_array_table_key: invalid key", + {{source_location(inner_loc), "not a key"}}), + source_location(inner_loc)); + } + lex_ws::invoke(inner_loc); + const auto close = lex_array_table_close::invoke(inner_loc); + if(!close) + { + throw internal_error(format_underline( + "toml::parse_table_key: no `]]`", + {{source_location(inner_loc), "should be `]]`"}}), + source_location(inner_loc)); + } + + // after [[table.key]], newline or EOF(empty table) required. + if(loc.iter() != loc.end()) + { + using lex_newline_after_table_key = + sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>; + const auto nl = lex_newline_after_table_key::invoke(loc); + if(!nl) + { + throw syntax_error(format_underline("toml::" + "parse_array_table_key: newline required after [[table.key]]", + {{source_location(loc), "expected newline"}}), + source_location(loc)); + } + } + return ok(std::make_pair(keys.unwrap().first, token.unwrap())); + } + else + { + return err(format_underline("toml::parse_array_table_key: " + "not a valid table key", {{source_location(loc), "here"}})); + } +} + +// parse table body (key-value pairs until the iter hits the next [tablekey]) +template<typename Value> +result<typename Value::table_type, std::string> +parse_ml_table(location& loc) +{ + using value_type = Value; + using table_type = typename value_type::table_type; + + const auto first = loc.iter(); + if(first == loc.end()) + { + return ok(table_type{}); + } + + // XXX at lest one newline is needed. + using skip_line = repeat< + sequence<maybe<lex_ws>, maybe<lex_comment>, lex_newline>, at_least<1>>; + skip_line::invoke(loc); + lex_ws::invoke(loc); + + table_type tab; + while(loc.iter() != loc.end()) + { + lex_ws::invoke(loc); + const auto before = loc.iter(); + if(const auto tmp = parse_array_table_key(loc)) // next table found + { + loc.reset(before); + return ok(tab); + } + if(const auto tmp = parse_table_key(loc)) // next table found + { + loc.reset(before); + return ok(tab); + } + + if(const auto kv = parse_key_value_pair<value_type>(loc)) + { + const auto& kvpair = kv.unwrap(); + const std::vector<key>& keys = kvpair.first.first; + const auto& key_reg = kvpair.first.second; + const value_type& val = kvpair.second; + const auto inserted = + insert_nested_key(tab, val, keys.begin(), keys.end(), key_reg); + if(!inserted) + { + return err(inserted.unwrap_err()); + } + } + else + { + return err(kv.unwrap_err()); + } + + // comment lines are skipped by the above function call. + // However, since the `skip_line` requires at least 1 newline, it fails + // if the file ends with ws and/or comment without newline. + // `skip_line` matches `ws? + comment? + newline`, not `ws` or `comment` + // itself. To skip the last ws and/or comment, call lexers. + // It does not matter if these fails, so the return value is discarded. + lex_ws::invoke(loc); + lex_comment::invoke(loc); + + // skip_line is (whitespace? comment? newline)_{1,}. multiple empty lines + // and comments after the last key-value pairs are allowed. + const auto newline = skip_line::invoke(loc); + if(!newline && loc.iter() != loc.end()) + { + const auto before2 = loc.iter(); + lex_ws::invoke(loc); // skip whitespace + const auto msg = format_underline("toml::parse_table: " + "invalid line format", {{source_location(loc), concat_to_string( + "expected newline, but got '", show_char(*loc.iter()), "'.")}}); + loc.reset(before2); + return err(msg); + } + + // the skip_lines only matches with lines that includes newline. + // to skip the last line that includes comment and/or whitespace + // but no newline, call them one more time. + lex_ws::invoke(loc); + lex_comment::invoke(loc); + } + return ok(tab); +} + +template<typename Value> +result<Value, std::string> parse_toml_file(location& loc) +{ + using value_type = Value; + using table_type = typename value_type::table_type; + + const auto first = loc.iter(); + if(first == loc.end()) + { + // For empty files, return an empty table with an empty region (zero-length). + // Without the region, error messages would miss the filename. + return ok(value_type(table_type{}, region(loc, first, first), {})); + } + + // put the first line as a region of a file + // Here first != loc.end(), so taking std::next is okay + const region file(loc, first, std::next(loc.iter())); + + // The first successive comments that are separated from the first value + // by an empty line are for a file itself. + // ```toml + // # this is a comment for a file. + // + // key = "the first value" + // ``` + // ```toml + // # this is a comment for "the first value". + // key = "the first value" + // ``` + std::vector<std::string> comments; + using lex_first_comments = sequence< + repeat<sequence<maybe<lex_ws>, lex_comment, lex_newline>, at_least<1>>, + sequence<maybe<lex_ws>, lex_newline> + >; + if(const auto token = lex_first_comments::invoke(loc)) + { + location inner_loc(loc.name(), token.unwrap().str()); + while(inner_loc.iter() != inner_loc.end()) + { + maybe<lex_ws>::invoke(inner_loc); // remove ws if exists + if(lex_newline::invoke(inner_loc)) + { + assert(inner_loc.iter() == inner_loc.end()); + break; // empty line found. + } + auto com = lex_comment::invoke(inner_loc).unwrap().str(); + com.erase(com.begin()); // remove # sign + comments.push_back(std::move(com)); + lex_newline::invoke(inner_loc); + } + } + + table_type data; + // root object is also a table, but without [tablename] + if(const auto tab = parse_ml_table<value_type>(loc)) + { + data = std::move(tab.unwrap()); + } + else // failed (empty table is regarded as success in parse_ml_table) + { + return err(tab.unwrap_err()); + } + while(loc.iter() != loc.end()) + { + // here, the region of [table] is regarded as the table-key because + // the table body is normally too big and it is not so informative + // if the first key-value pair of the table is shown in the error + // message. + if(const auto tabkey = parse_array_table_key(loc)) + { + const auto tab = parse_ml_table<value_type>(loc); + if(!tab){return err(tab.unwrap_err());} + + const auto& tk = tabkey.unwrap(); + const auto& keys = tk.first; + const auto& reg = tk.second; + + const auto inserted = insert_nested_key(data, + value_type(tab.unwrap(), reg, reg.comments()), + keys.begin(), keys.end(), reg, + /*is_array_of_table=*/ true); + if(!inserted) {return err(inserted.unwrap_err());} + + continue; + } + if(const auto tabkey = parse_table_key(loc)) + { + const auto tab = parse_ml_table<value_type>(loc); + if(!tab){return err(tab.unwrap_err());} + + const auto& tk = tabkey.unwrap(); + const auto& keys = tk.first; + const auto& reg = tk.second; + + const auto inserted = insert_nested_key(data, + value_type(tab.unwrap(), reg, reg.comments()), + keys.begin(), keys.end(), reg); + if(!inserted) {return err(inserted.unwrap_err());} + + continue; + } + return err(format_underline("toml::parse_toml_file: " + "unknown line appeared", {{source_location(loc), "unknown format"}})); + } + + return ok(Value(std::move(data), file, comments)); +} + +} // detail + +template<typename Comment = TOML11_DEFAULT_COMMENT_STRATEGY, + template<typename ...> class Table = std::unordered_map, + template<typename ...> class Array = std::vector> +basic_value<Comment, Table, Array> +parse(std::istream& is, const std::string& fname = "unknown file") +{ + using value_type = basic_value<Comment, Table, Array>; + + const auto beg = is.tellg(); + is.seekg(0, std::ios::end); + const auto end = is.tellg(); + const auto fsize = end - beg; + is.seekg(beg); + + // read whole file as a sequence of char + assert(fsize >= 0); + std::vector<char> letters(static_cast<std::size_t>(fsize)); + is.read(letters.data(), fsize); + + // append LF. + // Although TOML does not require LF at the EOF, to make parsing logic + // simpler, we "normalize" the content by adding LF if it does not exist. + // It also checks if the last char is CR, to avoid changing the meaning. + // This is not the *best* way to deal with the last character, but is a + // simple and quick fix. + if(!letters.empty() && letters.back() != '\n' && letters.back() != '\r') + { + letters.push_back('\n'); + } + + detail::location loc(std::move(fname), std::move(letters)); + + // skip BOM if exists. + // XXX component of BOM (like 0xEF) exceeds the representable range of + // signed char, so on some (actually, most) of the environment, these cannot + // be compared to char. However, since we are always out of luck, we need to + // check our chars are equivalent to BOM. To do this, first we need to + // convert char to unsigned char to guarantee the comparability. + if(loc.source()->size() >= 3) + { + std::array<unsigned char, 3> BOM; + std::memcpy(BOM.data(), loc.source()->data(), 3); + if(BOM[0] == 0xEF && BOM[1] == 0xBB && BOM[2] == 0xBF) + { + loc.advance(3); // BOM found. skip. + } + } + + const auto data = detail::parse_toml_file<value_type>(loc); + if(!data) + { + throw syntax_error(data.unwrap_err(), source_location(loc)); + } + return data.unwrap(); +} + +template<typename Comment = TOML11_DEFAULT_COMMENT_STRATEGY, + template<typename ...> class Table = std::unordered_map, + template<typename ...> class Array = std::vector> +basic_value<Comment, Table, Array> parse(const std::string& fname) +{ + std::ifstream ifs(fname.c_str(), std::ios_base::binary); + if(!ifs.good()) + { + throw std::runtime_error("toml::parse: file open error -> " + fname); + } + return parse<Comment, Table, Array>(ifs, fname); +} + +#ifdef TOML11_HAS_STD_FILESYSTEM +// This function just forwards `parse("filename.toml")` to std::string version +// to avoid the ambiguity in overload resolution. +// +// Both std::string and std::filesystem::path are convertible from const char*. +// Without this, both parse(std::string) and parse(std::filesystem::path) +// matches to parse("filename.toml"). This breaks the existing code. +// +// This function exactly matches to the invocation with c-string. +// So this function is preferred than others and the ambiguity disappears. +template<typename Comment = TOML11_DEFAULT_COMMENT_STRATEGY, + template<typename ...> class Table = std::unordered_map, + template<typename ...> class Array = std::vector> +basic_value<Comment, Table, Array> parse(const char* fname) +{ + return parse<Comment, Table, Array>(std::string(fname)); +} + +template<typename Comment = TOML11_DEFAULT_COMMENT_STRATEGY, + template<typename ...> class Table = std::unordered_map, + template<typename ...> class Array = std::vector> +basic_value<Comment, Table, Array> parse(const std::filesystem::path& fpath) +{ + std::ifstream ifs(fpath, std::ios_base::binary); + if(!ifs.good()) + { + throw std::runtime_error("toml::parse: file open error -> " + + fpath.string()); + } + return parse<Comment, Table, Array>(ifs, fpath.string()); +} +#endif // TOML11_HAS_STD_FILESYSTEM + +} // toml +#endif// TOML11_PARSER_HPP diff --git a/src/toml11/toml/region.hpp b/src/toml11/toml/region.hpp new file mode 100644 index 000000000..2e01e51d0 --- /dev/null +++ b/src/toml11/toml/region.hpp @@ -0,0 +1,417 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_REGION_HPP +#define TOML11_REGION_HPP +#include <memory> +#include <vector> +#include <algorithm> +#include <initializer_list> +#include <iterator> +#include <iomanip> +#include <cassert> +#include "color.hpp" + +namespace toml +{ +namespace detail +{ + +// helper function to avoid std::string(0, 'c') or std::string(iter, iter) +template<typename Iterator> +std::string make_string(Iterator first, Iterator last) +{ + if(first == last) {return "";} + return std::string(first, last); +} +inline std::string make_string(std::size_t len, char c) +{ + if(len == 0) {return "";} + return std::string(len, c); +} + +// region_base is a base class of location and region that are defined below. +// it will be used to generate better error messages. +struct region_base +{ + region_base() = default; + virtual ~region_base() = default; + region_base(const region_base&) = default; + region_base(region_base&& ) = default; + region_base& operator=(const region_base&) = default; + region_base& operator=(region_base&& ) = default; + + virtual bool is_ok() const noexcept {return false;} + virtual char front() const noexcept {return '\0';} + + virtual std::string str() const {return std::string("unknown region");} + virtual std::string name() const {return std::string("unknown file");} + virtual std::string line() const {return std::string("unknown line");} + virtual std::string line_num() const {return std::string("?");} + + // length of the region + virtual std::size_t size() const noexcept {return 0;} + // number of characters in the line before the region + virtual std::size_t before() const noexcept {return 0;} + // number of characters in the line after the region + virtual std::size_t after() const noexcept {return 0;} + + virtual std::vector<std::string> comments() const {return {};} + // ```toml + // # comment_before + // key = "value" # comment_inline + // ``` +}; + +// location represents a position in a container, which contains a file content. +// it can be considered as a region that contains only one character. +// +// it contains pointer to the file content and iterator that points the current +// location. +struct location final : public region_base +{ + using const_iterator = typename std::vector<char>::const_iterator; + using difference_type = typename const_iterator::difference_type; + using source_ptr = std::shared_ptr<const std::vector<char>>; + + location(std::string source_name, std::vector<char> cont) + : source_(std::make_shared<std::vector<char>>(std::move(cont))), + line_number_(1), source_name_(std::move(source_name)), iter_(source_->cbegin()) + {} + location(std::string source_name, const std::string& cont) + : source_(std::make_shared<std::vector<char>>(cont.begin(), cont.end())), + line_number_(1), source_name_(std::move(source_name)), iter_(source_->cbegin()) + {} + + location(const location&) = default; + location(location&&) = default; + location& operator=(const location&) = default; + location& operator=(location&&) = default; + ~location() = default; + + bool is_ok() const noexcept override {return static_cast<bool>(source_);} + char front() const noexcept override {return *iter_;} + + // this const prohibits codes like `++(loc.iter())`. + const const_iterator iter() const noexcept {return iter_;} + + const_iterator begin() const noexcept {return source_->cbegin();} + const_iterator end() const noexcept {return source_->cend();} + + // XXX `location::line_num()` used to be implemented using `std::count` to + // count a number of '\n'. But with a long toml file (typically, 10k lines), + // it becomes intolerably slow because each time it generates error messages, + // it counts '\n' from thousands of characters. To workaround it, I decided + // to introduce `location::line_number_` member variable and synchronize it + // to the location changes the point to look. So an overload of `iter()` + // which returns mutable reference is removed and `advance()`, `retrace()` + // and `reset()` is added. + void advance(difference_type n = 1) noexcept + { + this->line_number_ += static_cast<std::size_t>( + std::count(this->iter_, std::next(this->iter_, n), '\n')); + this->iter_ += n; + return; + } + void retrace(difference_type n = 1) noexcept + { + this->line_number_ -= static_cast<std::size_t>( + std::count(std::prev(this->iter_, n), this->iter_, '\n')); + this->iter_ -= n; + return; + } + void reset(const_iterator rollback) noexcept + { + // since c++11, std::distance works in both ways for random-access + // iterators and returns a negative value if `first > last`. + if(0 <= std::distance(rollback, this->iter_)) // rollback < iter + { + this->line_number_ -= static_cast<std::size_t>( + std::count(rollback, this->iter_, '\n')); + } + else // iter < rollback [[unlikely]] + { + this->line_number_ += static_cast<std::size_t>( + std::count(this->iter_, rollback, '\n')); + } + this->iter_ = rollback; + return; + } + + std::string str() const override {return make_string(1, *this->iter());} + std::string name() const override {return source_name_;} + + std::string line_num() const override + { + return std::to_string(this->line_number_); + } + + std::string line() const override + { + return make_string(this->line_begin(), this->line_end()); + } + + const_iterator line_begin() const noexcept + { + using reverse_iterator = std::reverse_iterator<const_iterator>; + return std::find(reverse_iterator(this->iter()), + reverse_iterator(this->begin()), '\n').base(); + } + const_iterator line_end() const noexcept + { + return std::find(this->iter(), this->end(), '\n'); + } + + // location is always points a character. so the size is 1. + std::size_t size() const noexcept override + { + return 1u; + } + std::size_t before() const noexcept override + { + const auto sz = std::distance(this->line_begin(), this->iter()); + assert(sz >= 0); + return static_cast<std::size_t>(sz); + } + std::size_t after() const noexcept override + { + const auto sz = std::distance(this->iter(), this->line_end()); + assert(sz >= 0); + return static_cast<std::size_t>(sz); + } + + source_ptr const& source() const& noexcept {return source_;} + source_ptr&& source() && noexcept {return std::move(source_);} + + private: + + source_ptr source_; + std::size_t line_number_; + std::string source_name_; + const_iterator iter_; +}; + +// region represents a range in a container, which contains a file content. +// +// it contains pointer to the file content and iterator that points the first +// and last location. +struct region final : public region_base +{ + using const_iterator = typename std::vector<char>::const_iterator; + using source_ptr = std::shared_ptr<const std::vector<char>>; + + // delete default constructor. source_ never be null. + region() = delete; + + explicit region(const location& loc) + : source_(loc.source()), source_name_(loc.name()), + first_(loc.iter()), last_(loc.iter()) + {} + explicit region(location&& loc) + : source_(loc.source()), source_name_(loc.name()), + first_(loc.iter()), last_(loc.iter()) + {} + + region(const location& loc, const_iterator f, const_iterator l) + : source_(loc.source()), source_name_(loc.name()), first_(f), last_(l) + {} + region(location&& loc, const_iterator f, const_iterator l) + : source_(loc.source()), source_name_(loc.name()), first_(f), last_(l) + {} + + region(const region&) = default; + region(region&&) = default; + region& operator=(const region&) = default; + region& operator=(region&&) = default; + ~region() = default; + + region& operator+=(const region& other) + { + // different regions cannot be concatenated + assert(this->begin() == other.begin() && this->end() == other.end() && + this->last_ == other.first_); + + this->last_ = other.last_; + return *this; + } + + bool is_ok() const noexcept override {return static_cast<bool>(source_);} + char front() const noexcept override {return *first_;} + + std::string str() const override {return make_string(first_, last_);} + std::string line() const override + { + if(this->contain_newline()) + { + return make_string(this->line_begin(), + std::find(this->line_begin(), this->last(), '\n')); + } + return make_string(this->line_begin(), this->line_end()); + } + std::string line_num() const override + { + return std::to_string(1 + std::count(this->begin(), this->first(), '\n')); + } + + std::size_t size() const noexcept override + { + const auto sz = std::distance(first_, last_); + assert(sz >= 0); + return static_cast<std::size_t>(sz); + } + std::size_t before() const noexcept override + { + const auto sz = std::distance(this->line_begin(), this->first()); + assert(sz >= 0); + return static_cast<std::size_t>(sz); + } + std::size_t after() const noexcept override + { + const auto sz = std::distance(this->last(), this->line_end()); + assert(sz >= 0); + return static_cast<std::size_t>(sz); + } + + bool contain_newline() const noexcept + { + return std::find(this->first(), this->last(), '\n') != this->last(); + } + + const_iterator line_begin() const noexcept + { + using reverse_iterator = std::reverse_iterator<const_iterator>; + return std::find(reverse_iterator(this->first()), + reverse_iterator(this->begin()), '\n').base(); + } + const_iterator line_end() const noexcept + { + return std::find(this->last(), this->end(), '\n'); + } + + const_iterator begin() const noexcept {return source_->cbegin();} + const_iterator end() const noexcept {return source_->cend();} + const_iterator first() const noexcept {return first_;} + const_iterator last() const noexcept {return last_;} + + source_ptr const& source() const& noexcept {return source_;} + source_ptr&& source() && noexcept {return std::move(source_);} + + std::string name() const override {return source_name_;} + + std::vector<std::string> comments() const override + { + // assuming the current region (`*this`) points a value. + // ```toml + // a = "value" + // ^^^^^^^- this region + // ``` + using rev_iter = std::reverse_iterator<const_iterator>; + + std::vector<std::string> com{}; + { + // find comments just before the current region. + // ```toml + // # this should be collected. + // # this also. + // a = value # not this. + // ``` + + // # this is a comment for `a`, not array elements. + // a = [1, 2, 3, 4, 5] + if(this->first() == std::find_if(this->line_begin(), this->first(), + [](const char c) noexcept -> bool {return c == '[' || c == '{';})) + { + auto iter = this->line_begin(); // points the first character + while(iter != this->begin()) + { + iter = std::prev(iter); + + // range [line_start, iter) represents the previous line + const auto line_start = std::find( + rev_iter(iter), rev_iter(this->begin()), '\n').base(); + const auto comment_found = std::find(line_start, iter, '#'); + if(comment_found == iter) + { + break; // comment not found. + } + + // exclude the following case. + // > a = "foo" # comment // <-- this is not a comment for b but a. + // > b = "current value" + if(std::all_of(line_start, comment_found, + [](const char c) noexcept -> bool { + return c == ' ' || c == '\t'; + })) + { + // unwrap the first '#' by std::next. + auto s = make_string(std::next(comment_found), iter); + if(!s.empty() && s.back() == '\r') {s.pop_back();} + com.push_back(std::move(s)); + } + else + { + break; + } + iter = line_start; + } + } + } + + if(com.size() > 1) + { + std::reverse(com.begin(), com.end()); + } + + { + // find comments just after the current region. + // ```toml + // # not this. + // a = value # this one. + // a = [ # not this (technically difficult) + // + // ] # and this. + // ``` + // The reason why it's difficult is that it requires parsing in the + // following case. + // ```toml + // a = [ 10 # this comment is for `10`. not for `a` but `a[0]`. + // # ... + // ] # this is apparently a comment for a. + // + // b = [ + // 3.14 ] # there is no way to add a comment to `3.14` currently. + // + // c = [ + // 3.14 # do this if you need a comment here. + // ] + // ``` + const auto comment_found = + std::find(this->last(), this->line_end(), '#'); + if(comment_found != this->line_end()) // '#' found + { + // table = {key = "value"} # what is this for? + // the above comment is not for "value", but {key="value"}. + if(comment_found == std::find_if(this->last(), comment_found, + [](const char c) noexcept -> bool { + return !(c == ' ' || c == '\t' || c == ','); + })) + { + // unwrap the first '#' by std::next. + auto s = make_string(std::next(comment_found), this->line_end()); + if(!s.empty() && s.back() == '\r') {s.pop_back();} + com.push_back(std::move(s)); + } + } + } + return com; + } + + private: + + source_ptr source_; + std::string source_name_; + const_iterator first_, last_; +}; + +} // detail +} // toml +#endif// TOML11_REGION_H diff --git a/src/toml11/toml/result.hpp b/src/toml11/toml/result.hpp new file mode 100644 index 000000000..77cd46c64 --- /dev/null +++ b/src/toml11/toml/result.hpp @@ -0,0 +1,717 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_RESULT_HPP +#define TOML11_RESULT_HPP +#include "traits.hpp" +#include <type_traits> +#include <stdexcept> +#include <utility> +#include <new> +#include <string> +#include <sstream> +#include <cassert> + +namespace toml +{ + +template<typename T> +struct success +{ + using value_type = T; + value_type value; + + explicit success(const value_type& v) + noexcept(std::is_nothrow_copy_constructible<value_type>::value) + : value(v) + {} + explicit success(value_type&& v) + noexcept(std::is_nothrow_move_constructible<value_type>::value) + : value(std::move(v)) + {} + + template<typename U> + explicit success(U&& v): value(std::forward<U>(v)) {} + + template<typename U> + explicit success(const success<U>& v): value(v.value) {} + template<typename U> + explicit success(success<U>&& v): value(std::move(v.value)) {} + + ~success() = default; + success(const success&) = default; + success(success&&) = default; + success& operator=(const success&) = default; + success& operator=(success&&) = default; +}; + +template<typename T> +struct failure +{ + using value_type = T; + value_type value; + + explicit failure(const value_type& v) + noexcept(std::is_nothrow_copy_constructible<value_type>::value) + : value(v) + {} + explicit failure(value_type&& v) + noexcept(std::is_nothrow_move_constructible<value_type>::value) + : value(std::move(v)) + {} + + template<typename U> + explicit failure(U&& v): value(std::forward<U>(v)) {} + + template<typename U> + explicit failure(const failure<U>& v): value(v.value) {} + template<typename U> + explicit failure(failure<U>&& v): value(std::move(v.value)) {} + + ~failure() = default; + failure(const failure&) = default; + failure(failure&&) = default; + failure& operator=(const failure&) = default; + failure& operator=(failure&&) = default; +}; + +template<typename T> +success<typename std::remove_cv<typename std::remove_reference<T>::type>::type> +ok(T&& v) +{ + return success< + typename std::remove_cv<typename std::remove_reference<T>::type>::type + >(std::forward<T>(v)); +} +template<typename T> +failure<typename std::remove_cv<typename std::remove_reference<T>::type>::type> +err(T&& v) +{ + return failure< + typename std::remove_cv<typename std::remove_reference<T>::type>::type + >(std::forward<T>(v)); +} + +inline success<std::string> ok(const char* literal) +{ + return success<std::string>(std::string(literal)); +} +inline failure<std::string> err(const char* literal) +{ + return failure<std::string>(std::string(literal)); +} + + +template<typename T, typename E> +struct result +{ + using value_type = T; + using error_type = E; + using success_type = success<value_type>; + using failure_type = failure<error_type>; + + result(const success_type& s): is_ok_(true) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(s); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + result(const failure_type& f): is_ok_(false) + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(f); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + result(success_type&& s): is_ok_(true) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s)); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + result(failure_type&& f): is_ok_(false) + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f)); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + + template<typename U> + result(const success<U>& s): is_ok_(true) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(s.value); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + template<typename U> + result(const failure<U>& f): is_ok_(false) + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(f.value); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + template<typename U> + result(success<U>&& s): is_ok_(true) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s.value)); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + template<typename U> + result(failure<U>&& f): is_ok_(false) + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f.value)); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + + result& operator=(const success_type& s) + { + this->cleanup(); + this->is_ok_ = true; + auto tmp = ::new(std::addressof(this->succ)) success_type(s); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + return *this; + } + result& operator=(const failure_type& f) + { + this->cleanup(); + this->is_ok_ = false; + auto tmp = ::new(std::addressof(this->fail)) failure_type(f); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + return *this; + } + result& operator=(success_type&& s) + { + this->cleanup(); + this->is_ok_ = true; + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s)); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + return *this; + } + result& operator=(failure_type&& f) + { + this->cleanup(); + this->is_ok_ = false; + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f)); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + return *this; + } + + template<typename U> + result& operator=(const success<U>& s) + { + this->cleanup(); + this->is_ok_ = true; + auto tmp = ::new(std::addressof(this->succ)) success_type(s.value); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + return *this; + } + template<typename U> + result& operator=(const failure<U>& f) + { + this->cleanup(); + this->is_ok_ = false; + auto tmp = ::new(std::addressof(this->fail)) failure_type(f.value); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + return *this; + } + template<typename U> + result& operator=(success<U>&& s) + { + this->cleanup(); + this->is_ok_ = true; + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s.value)); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + return *this; + } + template<typename U> + result& operator=(failure<U>&& f) + { + this->cleanup(); + this->is_ok_ = false; + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f.value)); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + return *this; + } + + ~result() noexcept {this->cleanup();} + + result(const result& other): is_ok_(other.is_ok()) + { + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok()); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err()); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + } + result(result&& other): is_ok_(other.is_ok()) + { + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok())); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err())); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + } + + template<typename U, typename F> + result(const result<U, F>& other): is_ok_(other.is_ok()) + { + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok()); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err()); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + } + template<typename U, typename F> + result(result<U, F>&& other): is_ok_(other.is_ok()) + { + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok())); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err())); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + } + + result& operator=(const result& other) + { + this->cleanup(); + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok()); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err()); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + is_ok_ = other.is_ok(); + return *this; + } + result& operator=(result&& other) + { + this->cleanup(); + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok())); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err())); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + is_ok_ = other.is_ok(); + return *this; + } + + template<typename U, typename F> + result& operator=(const result<U, F>& other) + { + this->cleanup(); + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok()); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err()); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + is_ok_ = other.is_ok(); + return *this; + } + template<typename U, typename F> + result& operator=(result<U, F>&& other) + { + this->cleanup(); + if(other.is_ok()) + { + auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok())); + assert(tmp == std::addressof(this->succ)); + (void)tmp; + } + else + { + auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err())); + assert(tmp == std::addressof(this->fail)); + (void)tmp; + } + is_ok_ = other.is_ok(); + return *this; + } + + bool is_ok() const noexcept {return is_ok_;} + bool is_err() const noexcept {return !is_ok_;} + + operator bool() const noexcept {return is_ok_;} + + value_type& unwrap() & + { + if(is_err()) + { + throw std::runtime_error("toml::result: bad unwrap: " + + format_error(this->as_err())); + } + return this->succ.value; + } + value_type const& unwrap() const& + { + if(is_err()) + { + throw std::runtime_error("toml::result: bad unwrap: " + + format_error(this->as_err())); + } + return this->succ.value; + } + value_type&& unwrap() && + { + if(is_err()) + { + throw std::runtime_error("toml::result: bad unwrap: " + + format_error(this->as_err())); + } + return std::move(this->succ.value); + } + + value_type& unwrap_or(value_type& opt) & + { + if(is_err()) {return opt;} + return this->succ.value; + } + value_type const& unwrap_or(value_type const& opt) const& + { + if(is_err()) {return opt;} + return this->succ.value; + } + value_type unwrap_or(value_type opt) && + { + if(is_err()) {return opt;} + return this->succ.value; + } + + error_type& unwrap_err() & + { + if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");} + return this->fail.value; + } + error_type const& unwrap_err() const& + { + if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");} + return this->fail.value; + } + error_type&& unwrap_err() && + { + if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");} + return std::move(this->fail.value); + } + + value_type& as_ok() & noexcept {return this->succ.value;} + value_type const& as_ok() const& noexcept {return this->succ.value;} + value_type&& as_ok() && noexcept {return std::move(this->succ.value);} + + error_type& as_err() & noexcept {return this->fail.value;} + error_type const& as_err() const& noexcept {return this->fail.value;} + error_type&& as_err() && noexcept {return std::move(this->fail.value);} + + + // prerequisities + // F: T -> U + // retval: result<U, E> + template<typename F> + result<detail::return_type_of_t<F, value_type&>, error_type> + map(F&& f) & + { + if(this->is_ok()){return ok(f(this->as_ok()));} + return err(this->as_err()); + } + template<typename F> + result<detail::return_type_of_t<F, value_type const&>, error_type> + map(F&& f) const& + { + if(this->is_ok()){return ok(f(this->as_ok()));} + return err(this->as_err()); + } + template<typename F> + result<detail::return_type_of_t<F, value_type &&>, error_type> + map(F&& f) && + { + if(this->is_ok()){return ok(f(std::move(this->as_ok())));} + return err(std::move(this->as_err())); + } + + // prerequisities + // F: E -> F + // retval: result<T, F> + template<typename F> + result<value_type, detail::return_type_of_t<F, error_type&>> + map_err(F&& f) & + { + if(this->is_err()){return err(f(this->as_err()));} + return ok(this->as_ok()); + } + template<typename F> + result<value_type, detail::return_type_of_t<F, error_type const&>> + map_err(F&& f) const& + { + if(this->is_err()){return err(f(this->as_err()));} + return ok(this->as_ok()); + } + template<typename F> + result<value_type, detail::return_type_of_t<F, error_type&&>> + map_err(F&& f) && + { + if(this->is_err()){return err(f(std::move(this->as_err())));} + return ok(std::move(this->as_ok())); + } + + // prerequisities + // F: T -> U + // retval: U + template<typename F, typename U> + detail::return_type_of_t<F, value_type&> + map_or_else(F&& f, U&& opt) & + { + if(this->is_err()){return std::forward<U>(opt);} + return f(this->as_ok()); + } + template<typename F, typename U> + detail::return_type_of_t<F, value_type const&> + map_or_else(F&& f, U&& opt) const& + { + if(this->is_err()){return std::forward<U>(opt);} + return f(this->as_ok()); + } + template<typename F, typename U> + detail::return_type_of_t<F, value_type&&> + map_or_else(F&& f, U&& opt) && + { + if(this->is_err()){return std::forward<U>(opt);} + return f(std::move(this->as_ok())); + } + + // prerequisities + // F: E -> U + // retval: U + template<typename F, typename U> + detail::return_type_of_t<F, error_type&> + map_err_or_else(F&& f, U&& opt) & + { + if(this->is_ok()){return std::forward<U>(opt);} + return f(this->as_err()); + } + template<typename F, typename U> + detail::return_type_of_t<F, error_type const&> + map_err_or_else(F&& f, U&& opt) const& + { + if(this->is_ok()){return std::forward<U>(opt);} + return f(this->as_err()); + } + template<typename F, typename U> + detail::return_type_of_t<F, error_type&&> + map_err_or_else(F&& f, U&& opt) && + { + if(this->is_ok()){return std::forward<U>(opt);} + return f(std::move(this->as_err())); + } + + // prerequisities: + // F: func T -> U + // toml::err(error_type) should be convertible to U. + // normally, type U is another result<S, F> and E is convertible to F + template<typename F> + detail::return_type_of_t<F, value_type&> + and_then(F&& f) & + { + if(this->is_ok()){return f(this->as_ok());} + return err(this->as_err()); + } + template<typename F> + detail::return_type_of_t<F, value_type const&> + and_then(F&& f) const& + { + if(this->is_ok()){return f(this->as_ok());} + return err(this->as_err()); + } + template<typename F> + detail::return_type_of_t<F, value_type&&> + and_then(F&& f) && + { + if(this->is_ok()){return f(std::move(this->as_ok()));} + return err(std::move(this->as_err())); + } + + // prerequisities: + // F: func E -> U + // toml::ok(value_type) should be convertible to U. + // normally, type U is another result<S, F> and T is convertible to S + template<typename F> + detail::return_type_of_t<F, error_type&> + or_else(F&& f) & + { + if(this->is_err()){return f(this->as_err());} + return ok(this->as_ok()); + } + template<typename F> + detail::return_type_of_t<F, error_type const&> + or_else(F&& f) const& + { + if(this->is_err()){return f(this->as_err());} + return ok(this->as_ok()); + } + template<typename F> + detail::return_type_of_t<F, error_type&&> + or_else(F&& f) && + { + if(this->is_err()){return f(std::move(this->as_err()));} + return ok(std::move(this->as_ok())); + } + + // if *this is error, returns *this. otherwise, returns other. + result and_other(const result& other) const& + { + return this->is_err() ? *this : other; + } + result and_other(result&& other) && + { + return this->is_err() ? std::move(*this) : std::move(other); + } + + // if *this is okay, returns *this. otherwise, returns other. + result or_other(const result& other) const& + { + return this->is_ok() ? *this : other; + } + result or_other(result&& other) && + { + return this->is_ok() ? std::move(*this) : std::move(other); + } + + void swap(result<T, E>& other) + { + result<T, E> tmp(std::move(*this)); + *this = std::move(other); + other = std::move(tmp); + return ; + } + + private: + + static std::string format_error(std::exception const& excpt) + { + return std::string(excpt.what()); + } + template<typename U, typename std::enable_if<!std::is_base_of< + std::exception, U>::value, std::nullptr_t>::type = nullptr> + static std::string format_error(U const& others) + { + std::ostringstream oss; oss << others; + return oss.str(); + } + + void cleanup() noexcept + { + if(this->is_ok_) {this->succ.~success_type();} + else {this->fail.~failure_type();} + return; + } + + private: + + bool is_ok_; + union + { + success_type succ; + failure_type fail; + }; +}; + +template<typename T, typename E> +void swap(result<T, E>& lhs, result<T, E>& rhs) +{ + lhs.swap(rhs); + return; +} + +// this might be confusing because it eagerly evaluated, while in the other +// cases operator && and || are short-circuited. +// +// template<typename T, typename E> +// inline result<T, E> +// operator&&(const result<T, E>& lhs, const result<T, E>& rhs) noexcept +// { +// return lhs.is_ok() ? rhs : lhs; +// } +// +// template<typename T, typename E> +// inline result<T, E> +// operator||(const result<T, E>& lhs, const result<T, E>& rhs) noexcept +// { +// return lhs.is_ok() ? lhs : rhs; +// } + +// ---------------------------------------------------------------------------- +// re-use result<T, E> as a optional<T> with none_t + +namespace detail +{ +struct none_t {}; +inline bool operator==(const none_t&, const none_t&) noexcept {return true;} +inline bool operator!=(const none_t&, const none_t&) noexcept {return false;} +inline bool operator< (const none_t&, const none_t&) noexcept {return false;} +inline bool operator<=(const none_t&, const none_t&) noexcept {return true;} +inline bool operator> (const none_t&, const none_t&) noexcept {return false;} +inline bool operator>=(const none_t&, const none_t&) noexcept {return true;} +template<typename charT, typename traitsT> +std::basic_ostream<charT, traitsT>& +operator<<(std::basic_ostream<charT, traitsT>& os, const none_t&) +{ + os << "none"; + return os; +} +inline failure<none_t> none() noexcept {return failure<none_t>{none_t{}};} +} // detail +} // toml11 +#endif// TOML11_RESULT_H diff --git a/src/toml11/toml/serializer.hpp b/src/toml11/toml/serializer.hpp new file mode 100644 index 000000000..88ae775a8 --- /dev/null +++ b/src/toml11/toml/serializer.hpp @@ -0,0 +1,922 @@ +// Copyright Toru Niina 2019. +// Distributed under the MIT License. +#ifndef TOML11_SERIALIZER_HPP +#define TOML11_SERIALIZER_HPP +#include <cmath> +#include <cstdio> + +#include <limits> + +#include "lexer.hpp" +#include "value.hpp" + +namespace toml +{ + +// This function serialize a key. It checks a string is a bare key and +// escapes special characters if the string is not compatible to a bare key. +// ```cpp +// std::string k("non.bare.key"); // the key itself includes `.`s. +// std::string formatted = toml::format_key(k); +// assert(formatted == "\"non.bare.key\""); +// ``` +// +// This function is exposed to make it easy to write a user-defined serializer. +// Since toml restricts characters available in a bare key, generally a string +// should be escaped. But checking whether a string needs to be surrounded by +// a `"` and escaping some special character is boring. +template<typename charT, typename traits, typename Alloc> +std::basic_string<charT, traits, Alloc> +format_key(const std::basic_string<charT, traits, Alloc>& k) +{ + if(k.empty()) + { + return std::string("\"\""); + } + + // check the key can be a bare (unquoted) key + detail::location loc(k, std::vector<char>(k.begin(), k.end())); + detail::lex_unquoted_key::invoke(loc); + if(loc.iter() == loc.end()) + { + return k; // all the tokens are consumed. the key is unquoted-key. + } + + //if it includes special characters, then format it in a "quoted" key. + std::basic_string<charT, traits, Alloc> serialized("\""); + for(const char c : k) + { + switch(c) + { + case '\\': {serialized += "\\\\"; break;} + case '\"': {serialized += "\\\""; break;} + case '\b': {serialized += "\\b"; break;} + case '\t': {serialized += "\\t"; break;} + case '\f': {serialized += "\\f"; break;} + case '\n': {serialized += "\\n"; break;} + case '\r': {serialized += "\\r"; break;} + default : {serialized += c; break;} + } + } + serialized += "\""; + return serialized; +} + +template<typename charT, typename traits, typename Alloc> +std::basic_string<charT, traits, Alloc> +format_keys(const std::vector<std::basic_string<charT, traits, Alloc>>& keys) +{ + if(keys.empty()) + { + return std::string("\"\""); + } + + std::basic_string<charT, traits, Alloc> serialized; + for(const auto& ky : keys) + { + serialized += format_key(ky); + serialized += charT('.'); + } + serialized.pop_back(); // remove the last dot '.' + return serialized; +} + +template<typename Value> +struct serializer +{ + static_assert(detail::is_basic_value<Value>::value, + "toml::serializer is for toml::value and its variants, " + "toml::basic_value<...>."); + + using value_type = Value; + using key_type = typename value_type::key_type ; + using comment_type = typename value_type::comment_type ; + using boolean_type = typename value_type::boolean_type ; + using integer_type = typename value_type::integer_type ; + using floating_type = typename value_type::floating_type ; + using string_type = typename value_type::string_type ; + using local_time_type = typename value_type::local_time_type ; + using local_date_type = typename value_type::local_date_type ; + using local_datetime_type = typename value_type::local_datetime_type ; + using offset_datetime_type = typename value_type::offset_datetime_type; + using array_type = typename value_type::array_type ; + using table_type = typename value_type::table_type ; + + serializer(const std::size_t w = 80u, + const int float_prec = std::numeric_limits<toml::floating>::max_digits10, + const bool can_be_inlined = false, + const bool no_comment = false, + std::vector<toml::key> ks = {}, + const bool value_has_comment = false) + : can_be_inlined_(can_be_inlined), no_comment_(no_comment), + value_has_comment_(value_has_comment && !no_comment), + float_prec_(float_prec), width_(w), keys_(std::move(ks)) + {} + ~serializer() = default; + + std::string operator()(const boolean_type& b) const + { + return b ? "true" : "false"; + } + std::string operator()(const integer_type i) const + { + return std::to_string(i); + } + std::string operator()(const floating_type f) const + { + if(std::isnan(f)) + { + if(std::signbit(f)) + { + return std::string("-nan"); + } + else + { + return std::string("nan"); + } + } + else if(!std::isfinite(f)) + { + if(std::signbit(f)) + { + return std::string("-inf"); + } + else + { + return std::string("inf"); + } + } + + const auto fmt = "%.*g"; + const auto bsz = std::snprintf(nullptr, 0, fmt, this->float_prec_, f); + // +1 for null character(\0) + std::vector<char> buf(static_cast<std::size_t>(bsz + 1), '\0'); + std::snprintf(buf.data(), buf.size(), fmt, this->float_prec_, f); + + std::string token(buf.begin(), std::prev(buf.end())); + if(!token.empty() && token.back() == '.') // 1. => 1.0 + { + token += '0'; + } + + const auto e = std::find_if( + token.cbegin(), token.cend(), [](const char c) noexcept -> bool { + return c == 'e' || c == 'E'; + }); + const auto has_exponent = (token.cend() != e); + const auto has_fraction = (token.cend() != std::find( + token.cbegin(), token.cend(), '.')); + + if(!has_exponent && !has_fraction) + { + // the resulting value does not have any float specific part! + token += ".0"; + } + return token; + } + std::string operator()(const string_type& s) const + { + if(s.kind == string_t::basic) + { + if((std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend() || + std::find(s.str.cbegin(), s.str.cend(), '\"') != s.str.cend()) && + this->width_ != (std::numeric_limits<std::size_t>::max)()) + { + // if linefeed or double-quote is contained, + // make it multiline basic string. + const auto escaped = this->escape_ml_basic_string(s.str); + std::string open("\"\"\""); + std::string close("\"\"\""); + if(escaped.find('\n') != std::string::npos || + this->width_ < escaped.size() + 6) + { + // if the string body contains newline or is enough long, + // add newlines after and before delimiters. + open += "\n"; + close = std::string("\\\n") + close; + } + return open + escaped + close; + } + + // no linefeed. try to make it oneline-string. + std::string oneline = this->escape_basic_string(s.str); + if(oneline.size() + 2 < width_ || width_ < 2) + { + const std::string quote("\""); + return quote + oneline + quote; + } + + // the line is too long compared to the specified width. + // split it into multiple lines. + std::string token("\"\"\"\n"); + while(!oneline.empty()) + { + if(oneline.size() < width_) + { + token += oneline; + oneline.clear(); + } + else if(oneline.at(width_-2) == '\\') + { + token += oneline.substr(0, width_-2); + token += "\\\n"; + oneline.erase(0, width_-2); + } + else + { + token += oneline.substr(0, width_-1); + token += "\\\n"; + oneline.erase(0, width_-1); + } + } + return token + std::string("\\\n\"\"\""); + } + else // the string `s` is literal-string. + { + if(std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend() || + std::find(s.str.cbegin(), s.str.cend(), '\'') != s.str.cend() ) + { + std::string open("'''"); + if(this->width_ + 6 < s.str.size()) + { + open += '\n'; // the first newline is ignored by TOML spec + } + const std::string close("'''"); + return open + s.str + close; + } + else + { + const std::string quote("'"); + return quote + s.str + quote; + } + } + } + + std::string operator()(const local_date_type& d) const + { + std::ostringstream oss; + oss << d; + return oss.str(); + } + std::string operator()(const local_time_type& t) const + { + std::ostringstream oss; + oss << t; + return oss.str(); + } + std::string operator()(const local_datetime_type& dt) const + { + std::ostringstream oss; + oss << dt; + return oss.str(); + } + std::string operator()(const offset_datetime_type& odt) const + { + std::ostringstream oss; + oss << odt; + return oss.str(); + } + + std::string operator()(const array_type& v) const + { + if(v.empty()) + { + return std::string("[]"); + } + if(this->is_array_of_tables(v)) + { + return make_array_of_tables(v); + } + + // not an array of tables. normal array. + // first, try to make it inline if none of the elements have a comment. + if( ! this->has_comment_inside(v)) + { + const auto inl = this->make_inline_array(v); + if(inl.size() < this->width_ && + std::find(inl.cbegin(), inl.cend(), '\n') == inl.cend()) + { + return inl; + } + } + + // if the length exceeds this->width_, print multiline array. + // key = [ + // # ... + // 42, + // ... + // ] + std::string token; + std::string current_line; + token += "[\n"; + for(const auto& item : v) + { + if( ! item.comments().empty() && !no_comment_) + { + // if comment exists, the element must be the only element in the line. + // e.g. the following is not allowed. + // ```toml + // array = [ + // # comment for what? + // 1, 2, 3, 4, 5 + // ] + // ``` + if(!current_line.empty()) + { + if(current_line.back() != '\n') + { + current_line += '\n'; + } + token += current_line; + current_line.clear(); + } + for(const auto& c : item.comments()) + { + token += '#'; + token += c; + token += '\n'; + } + token += toml::visit(*this, item); + if(!token.empty() && token.back() == '\n') {token.pop_back();} + token += ",\n"; + continue; + } + std::string next_elem; + if(item.is_table()) + { + serializer ser(*this); + ser.can_be_inlined_ = true; + ser.width_ = (std::numeric_limits<std::size_t>::max)(); + next_elem += toml::visit(ser, item); + } + else + { + next_elem += toml::visit(*this, item); + } + + // comma before newline. + if(!next_elem.empty() && next_elem.back() == '\n') {next_elem.pop_back();} + + // if current line does not exceeds the width limit, continue. + if(current_line.size() + next_elem.size() + 1 < this->width_) + { + current_line += next_elem; + current_line += ','; + } + else if(current_line.empty()) + { + // if current line was empty, force put the next_elem because + // next_elem is not splittable + token += next_elem; + token += ",\n"; + // current_line is kept empty + } + else // reset current_line + { + assert(current_line.back() == ','); + token += current_line; + token += '\n'; + current_line = next_elem; + current_line += ','; + } + } + if(!current_line.empty()) + { + if(!current_line.empty() && current_line.back() != '\n') + { + current_line += '\n'; + } + token += current_line; + } + token += "]\n"; + return token; + } + + // templatize for any table-like container + std::string operator()(const table_type& v) const + { + // if an element has a comment, then it can't be inlined. + // table = {# how can we write a comment for this? key = "value"} + if(this->can_be_inlined_ && !(this->has_comment_inside(v))) + { + std::string token; + if(!this->keys_.empty()) + { + token += format_key(this->keys_.back()); + token += " = "; + } + token += this->make_inline_table(v); + if(token.size() < this->width_ && + token.end() == std::find(token.begin(), token.end(), '\n')) + { + return token; + } + } + + std::string token; + if(!keys_.empty()) + { + token += '['; + token += format_keys(keys_); + token += "]\n"; + } + token += this->make_multiline_table(v); + return token; + } + + private: + + std::string escape_basic_string(const std::string& s) const + { + //XXX assuming `s` is a valid utf-8 sequence. + std::string retval; + for(const char c : s) + { + switch(c) + { + case '\\': {retval += "\\\\"; break;} + case '\"': {retval += "\\\""; break;} + case '\b': {retval += "\\b"; break;} + case '\t': {retval += "\\t"; break;} + case '\f': {retval += "\\f"; break;} + case '\n': {retval += "\\n"; break;} + case '\r': {retval += "\\r"; break;} + default : + { + if((0x00 <= c && c <= 0x08) || (0x0A <= c && c <= 0x1F) || c == 0x7F) + { + retval += "\\u00"; + retval += char(48 + (c / 16)); + retval += char((c % 16 < 10 ? 48 : 55) + (c % 16)); + } + else + { + retval += c; + } + } + } + } + return retval; + } + + std::string escape_ml_basic_string(const std::string& s) const + { + std::string retval; + for(auto i=s.cbegin(), e=s.cend(); i!=e; ++i) + { + switch(*i) + { + case '\\': {retval += "\\\\"; break;} + // One or two consecutive "s are allowed. + // Later we will check there are no three consecutive "s. + // case '\"': {retval += "\\\""; break;} + case '\b': {retval += "\\b"; break;} + case '\t': {retval += "\\t"; break;} + case '\f': {retval += "\\f"; break;} + case '\n': {retval += "\n"; break;} + case '\r': + { + if(std::next(i) != e && *std::next(i) == '\n') + { + retval += "\r\n"; + ++i; + } + else + { + retval += "\\r"; + } + break; + } + default : + { + const auto c = *i; + if((0x00 <= c && c <= 0x08) || (0x0A <= c && c <= 0x1F) || c == 0x7F) + { + retval += "\\u00"; + retval += char(48 + (c / 16)); + retval += char((c % 16 < 10 ? 48 : 55) + (c % 16)); + } + else + { + retval += c; + } + } + + } + } + // Only 1 or 2 consecutive `"`s are allowed in multiline basic string. + // 3 consecutive `"`s are considered as a closing delimiter. + // We need to check if there are 3 or more consecutive `"`s and insert + // backslash to break them down into several short `"`s like the `str6` + // in the following example. + // ```toml + // str4 = """Here are two quotation marks: "". Simple enough.""" + // # str5 = """Here are three quotation marks: """.""" # INVALID + // str5 = """Here are three quotation marks: ""\".""" + // str6 = """Here are fifteen quotation marks: ""\"""\"""\"""\"""\".""" + // ``` + auto found_3_quotes = retval.find("\"\"\""); + while(found_3_quotes != std::string::npos) + { + retval.replace(found_3_quotes, 3, "\"\"\\\""); + found_3_quotes = retval.find("\"\"\""); + } + return retval; + } + + // if an element of a table or an array has a comment, it cannot be inlined. + bool has_comment_inside(const array_type& a) const noexcept + { + // if no_comment is set, comments would not be written. + if(this->no_comment_) {return false;} + + for(const auto& v : a) + { + if(!v.comments().empty()) {return true;} + } + return false; + } + bool has_comment_inside(const table_type& t) const noexcept + { + // if no_comment is set, comments would not be written. + if(this->no_comment_) {return false;} + + for(const auto& kv : t) + { + if(!kv.second.comments().empty()) {return true;} + } + return false; + } + + std::string make_inline_array(const array_type& v) const + { + assert(!has_comment_inside(v)); + std::string token; + token += '['; + bool is_first = true; + for(const auto& item : v) + { + if(is_first) {is_first = false;} else {token += ',';} + token += visit(serializer( + (std::numeric_limits<std::size_t>::max)(), this->float_prec_, + /* inlined */ true, /*no comment*/ false, /*keys*/ {}, + /*has_comment*/ !item.comments().empty()), item); + } + token += ']'; + return token; + } + + std::string make_inline_table(const table_type& v) const + { + assert(!has_comment_inside(v)); + assert(this->can_be_inlined_); + std::string token; + token += '{'; + bool is_first = true; + for(const auto& kv : v) + { + // in inline tables, trailing comma is not allowed (toml-lang #569). + if(is_first) {is_first = false;} else {token += ',';} + token += format_key(kv.first); + token += '='; + token += visit(serializer( + (std::numeric_limits<std::size_t>::max)(), this->float_prec_, + /* inlined */ true, /*no comment*/ false, /*keys*/ {}, + /*has_comment*/ !kv.second.comments().empty()), kv.second); + } + token += '}'; + return token; + } + + std::string make_multiline_table(const table_type& v) const + { + std::string token; + + // print non-table elements first. + // ```toml + // [foo] # a table we're writing now here + // key = "value" # <- non-table element, "key" + // # ... + // [foo.bar] # <- table element, "bar" + // ``` + // because after printing [foo.bar], the remaining non-table values will + // be assigned into [foo.bar], not [foo]. Those values should be printed + // earlier. + for(const auto& kv : v) + { + if(kv.second.is_table() || is_array_of_tables(kv.second)) + { + continue; + } + + token += write_comments(kv.second); + + const auto key_and_sep = format_key(kv.first) + " = "; + const auto residual_width = (this->width_ > key_and_sep.size()) ? + this->width_ - key_and_sep.size() : 0; + token += key_and_sep; + token += visit(serializer(residual_width, this->float_prec_, + /*can be inlined*/ true, /*no comment*/ false, /*keys*/ {}, + /*has_comment*/ !kv.second.comments().empty()), kv.second); + + if(token.back() != '\n') + { + token += '\n'; + } + } + + // normal tables / array of tables + + // after multiline table appeared, the other tables cannot be inline + // because the table would be assigned into the table. + // [foo] + // ... + // bar = {...} # <- bar will be a member of [foo]. + bool multiline_table_printed = false; + for(const auto& kv : v) + { + if(!kv.second.is_table() && !is_array_of_tables(kv.second)) + { + continue; // other stuff are already serialized. skip them. + } + + std::vector<toml::key> ks(this->keys_); + ks.push_back(kv.first); + + auto tmp = visit(serializer(this->width_, this->float_prec_, + !multiline_table_printed, this->no_comment_, ks, + /*has_comment*/ !kv.second.comments().empty()), kv.second); + + // If it is the first time to print a multi-line table, it would be + // helpful to separate normal key-value pair and subtables by a + // newline. + // (this checks if the current key-value pair contains newlines. + // but it is not perfect because multi-line string can also contain + // a newline. in such a case, an empty line will be written) TODO + if((!multiline_table_printed) && + std::find(tmp.cbegin(), tmp.cend(), '\n') != tmp.cend()) + { + multiline_table_printed = true; + token += '\n'; // separate key-value pairs and subtables + + token += write_comments(kv.second); + token += tmp; + + // care about recursive tables (all tables in each level prints + // newline and there will be a full of newlines) + if(tmp.substr(tmp.size() - 2, 2) != "\n\n" && + tmp.substr(tmp.size() - 4, 4) != "\r\n\r\n" ) + { + token += '\n'; + } + } + else + { + token += write_comments(kv.second); + token += tmp; + token += '\n'; + } + } + return token; + } + + std::string make_array_of_tables(const array_type& v) const + { + // if it's not inlined, we need to add `[[table.key]]`. + // but if it can be inlined, we can format it as the following. + // ``` + // table.key = [ + // {...}, + // # comment + // {...}, + // ] + // ``` + // This function checks if inlinization is possible or not, and then + // format the array-of-tables in a proper way. + // + // Note about comments: + // + // If the array itself has a comment (value_has_comment_ == true), we + // should try to make it inline. + // ```toml + // # comment about array + // array = [ + // # comment about table element + // {of = "table"} + // ] + // ``` + // If it is formatted as a multiline table, the two comments becomes + // indistinguishable. + // ```toml + // # comment about array + // # comment about table element + // [[array]] + // of = "table" + // ``` + // So we need to try to make it inline, and it force-inlines regardless + // of the line width limit. + // It may fail if the element of a table has comment. In that case, + // the array-of-tables will be formatted as a multiline table. + if(this->can_be_inlined_ || this->value_has_comment_) + { + std::string token; + if(!keys_.empty()) + { + token += format_key(keys_.back()); + token += " = "; + } + + bool failed = false; + token += "[\n"; + for(const auto& item : v) + { + // if an element of the table has a comment, the table + // cannot be inlined. + if(this->has_comment_inside(item.as_table())) + { + failed = true; + break; + } + // write comments for the table itself + token += write_comments(item); + + const auto t = this->make_inline_table(item.as_table()); + + if(t.size() + 1 > width_ || // +1 for the last comma {...}, + std::find(t.cbegin(), t.cend(), '\n') != t.cend()) + { + // if the value itself has a comment, ignore the line width limit + if( ! this->value_has_comment_) + { + failed = true; + break; + } + } + token += t; + token += ",\n"; + } + + if( ! failed) + { + token += "]\n"; + return token; + } + // if failed, serialize them as [[array.of.tables]]. + } + + std::string token; + for(const auto& item : v) + { + token += write_comments(item); + token += "[["; + token += format_keys(keys_); + token += "]]\n"; + token += this->make_multiline_table(item.as_table()); + } + return token; + } + + std::string write_comments(const value_type& v) const + { + std::string retval; + if(this->no_comment_) {return retval;} + + for(const auto& c : v.comments()) + { + retval += '#'; + retval += c; + retval += '\n'; + } + return retval; + } + + bool is_array_of_tables(const value_type& v) const + { + if(!v.is_array() || v.as_array().empty()) {return false;} + return is_array_of_tables(v.as_array()); + } + bool is_array_of_tables(const array_type& v) const + { + // Since TOML v0.5.0, heterogeneous arrays are allowed. So we need to + // check all the element in an array to check if the array is an array + // of tables. + return std::all_of(v.begin(), v.end(), [](const value_type& elem) { + return elem.is_table(); + }); + } + + private: + + bool can_be_inlined_; + bool no_comment_; + bool value_has_comment_; + int float_prec_; + std::size_t width_; + std::vector<toml::key> keys_; +}; + +template<typename C, + template<typename ...> class M, template<typename ...> class V> +std::string +format(const basic_value<C, M, V>& v, std::size_t w = 80u, + int fprec = std::numeric_limits<toml::floating>::max_digits10, + bool no_comment = false, bool force_inline = false) +{ + using value_type = basic_value<C, M, V>; + // if value is a table, it is considered to be a root object. + // the root object can't be an inline table. + if(v.is_table()) + { + std::ostringstream oss; + if(!v.comments().empty()) + { + oss << v.comments(); + oss << '\n'; // to split the file comment from the first element + } + const auto serialized = visit(serializer<value_type>(w, fprec, false, no_comment), v); + oss << serialized; + return oss.str(); + } + return visit(serializer<value_type>(w, fprec, force_inline), v); +} + +namespace detail +{ +template<typename charT, typename traits> +int comment_index(std::basic_ostream<charT, traits>&) +{ + static const int index = std::ios_base::xalloc(); + return index; +} +} // detail + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +nocomment(std::basic_ostream<charT, traits>& os) +{ + // by default, it is zero. and by default, it shows comments. + os.iword(detail::comment_index(os)) = 1; + return os; +} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +showcomment(std::basic_ostream<charT, traits>& os) +{ + // by default, it is zero. and by default, it shows comments. + os.iword(detail::comment_index(os)) = 0; + return os; +} + +template<typename charT, typename traits, typename C, + template<typename ...> class M, template<typename ...> class V> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const basic_value<C, M, V>& v) +{ + using value_type = basic_value<C, M, V>; + + // get status of std::setw(). + const auto w = static_cast<std::size_t>(os.width()); + const int fprec = static_cast<int>(os.precision()); + os.width(0); + + // by default, iword is initialized by 0. And by default, toml11 outputs + // comments. So `0` means showcomment. 1 means nocommnet. + const bool no_comment = (1 == os.iword(detail::comment_index(os))); + + if(!no_comment && v.is_table() && !v.comments().empty()) + { + os << v.comments(); + os << '\n'; // to split the file comment from the first element + } + // the root object can't be an inline table. so pass `false`. + const auto serialized = visit(serializer<value_type>(w, fprec, no_comment, false), v); + os << serialized; + + // if v is a non-table value, and has only one comment, then + // put a comment just after a value. in the following way. + // + // ```toml + // key = "value" # comment. + // ``` + // + // Since the top-level toml object is a table, one who want to put a + // non-table toml value must use this in a following way. + // + // ```cpp + // toml::value v; + // std::cout << "user-defined-key = " << v << std::endl; + // ``` + // + // In this case, it is impossible to put comments before key-value pair. + // The only way to preserve comments is to put all of them after a value. + if(!no_comment && !v.is_table() && !v.comments().empty()) + { + os << " #"; + for(const auto& c : v.comments()) {os << c;} + } + return os; +} + +} // toml +#endif// TOML11_SERIALIZER_HPP diff --git a/src/toml11/toml/source_location.hpp b/src/toml11/toml/source_location.hpp new file mode 100644 index 000000000..fa175b5b4 --- /dev/null +++ b/src/toml11/toml/source_location.hpp @@ -0,0 +1,233 @@ +// Copyright Toru Niina 2019. +// Distributed under the MIT License. +#ifndef TOML11_SOURCE_LOCATION_HPP +#define TOML11_SOURCE_LOCATION_HPP +#include <cstdint> +#include <sstream> + +#include "region.hpp" + +namespace toml +{ + +// A struct to contain location in a toml file. +// The interface imitates std::experimental::source_location, +// but not completely the same. +// +// It would be constructed by toml::value. It can be used to generate +// user-defined error messages. +// +// - std::uint_least32_t line() const noexcept +// - returns the line number where the region is on. +// - std::uint_least32_t column() const noexcept +// - returns the column number where the region starts. +// - std::uint_least32_t region() const noexcept +// - returns the size of the region. +// +// +-- line() +-- region of interest (region() == 9) +// v .---+---. +// 12 | value = "foo bar" +// ^ +// +-- column() +// +// - std::string const& file_name() const noexcept; +// - name of the file. +// - std::string const& line_str() const noexcept; +// - the whole line that contains the region of interest. +// +struct source_location +{ + public: + + source_location() + : line_num_(1), column_num_(1), region_size_(1), + file_name_("unknown file"), line_str_("") + {} + + explicit source_location(const detail::region_base* reg) + : line_num_(1), column_num_(1), region_size_(1), + file_name_("unknown file"), line_str_("") + { + if(reg) + { + if(reg->line_num() != detail::region_base().line_num()) + { + line_num_ = static_cast<std::uint_least32_t>( + std::stoul(reg->line_num())); + } + column_num_ = static_cast<std::uint_least32_t>(reg->before() + 1); + region_size_ = static_cast<std::uint_least32_t>(reg->size()); + file_name_ = reg->name(); + line_str_ = reg->line(); + } + } + + explicit source_location(const detail::region& reg) + : line_num_(static_cast<std::uint_least32_t>(std::stoul(reg.line_num()))), + column_num_(static_cast<std::uint_least32_t>(reg.before() + 1)), + region_size_(static_cast<std::uint_least32_t>(reg.size())), + file_name_(reg.name()), + line_str_ (reg.line()) + {} + explicit source_location(const detail::location& loc) + : line_num_(static_cast<std::uint_least32_t>(std::stoul(loc.line_num()))), + column_num_(static_cast<std::uint_least32_t>(loc.before() + 1)), + region_size_(static_cast<std::uint_least32_t>(loc.size())), + file_name_(loc.name()), + line_str_ (loc.line()) + {} + + ~source_location() = default; + source_location(source_location const&) = default; + source_location(source_location &&) = default; + source_location& operator=(source_location const&) = default; + source_location& operator=(source_location &&) = default; + + std::uint_least32_t line() const noexcept {return line_num_;} + std::uint_least32_t column() const noexcept {return column_num_;} + std::uint_least32_t region() const noexcept {return region_size_;} + + std::string const& file_name() const noexcept {return file_name_;} + std::string const& line_str() const noexcept {return line_str_;} + + private: + + std::uint_least32_t line_num_; + std::uint_least32_t column_num_; + std::uint_least32_t region_size_; + std::string file_name_; + std::string line_str_; +}; + +namespace detail +{ + +// internal error message generation. +inline std::string format_underline(const std::string& message, + const std::vector<std::pair<source_location, std::string>>& loc_com, + const std::vector<std::string>& helps = {}, + const bool colorize = TOML11_ERROR_MESSAGE_COLORIZED) +{ + std::size_t line_num_width = 0; + for(const auto& lc : loc_com) + { + std::uint_least32_t line = lc.first.line(); + std::size_t digit = 0; + while(line != 0) + { + line /= 10; + digit += 1; + } + line_num_width = (std::max)(line_num_width, digit); + } + // 1 is the minimum width + line_num_width = std::max<std::size_t>(line_num_width, 1); + + std::ostringstream retval; + + if(colorize) + { + retval << color::colorize; // turn on ANSI color + } + + // XXX + // Here, before `colorize` support, it does not output `[error]` prefix + // automatically. So some user may output it manually and this change may + // duplicate the prefix. To avoid it, check the first 7 characters and + // if it is "[error]", it removes that part from the message shown. + if(message.size() > 7 && message.substr(0, 7) == "[error]") + { + retval << color::bold << color::red << "[error]" << color::reset + << color::bold << message.substr(7) << color::reset << '\n'; + } + else + { + retval << color::bold << color::red << "[error] " << color::reset + << color::bold << message << color::reset << '\n'; + } + + const auto format_one_location = [line_num_width] + (std::ostringstream& oss, + const source_location& loc, const std::string& comment) -> void + { + oss << ' ' << color::bold << color::blue + << std::setw(static_cast<int>(line_num_width)) + << std::right << loc.line() << " | " << color::reset + << loc.line_str() << '\n'; + + oss << make_string(line_num_width + 1, ' ') + << color::bold << color::blue << " | " << color::reset + << make_string(loc.column()-1 /*1-origin*/, ' '); + + if(loc.region() == 1) + { + // invalid + // ^------ + oss << color::bold << color::red << "^---" << color::reset; + } + else + { + // invalid + // ~~~~~~~ + const auto underline_len = (std::min)( + static_cast<std::size_t>(loc.region()), loc.line_str().size()); + oss << color::bold << color::red + << make_string(underline_len, '~') << color::reset; + } + oss << ' '; + oss << comment; + return; + }; + + assert(!loc_com.empty()); + + // --> example.toml + // | + retval << color::bold << color::blue << " --> " << color::reset + << loc_com.front().first.file_name() << '\n'; + retval << make_string(line_num_width + 1, ' ') + << color::bold << color::blue << " |\n" << color::reset; + // 1 | key value + // | ^--- missing = + format_one_location(retval, loc_com.front().first, loc_com.front().second); + + // process the rest of the locations + for(std::size_t i=1; i<loc_com.size(); ++i) + { + const auto& prev = loc_com.at(i-1); + const auto& curr = loc_com.at(i); + + retval << '\n'; + // if the filenames are the same, print "..." + if(prev.first.file_name() == curr.first.file_name()) + { + retval << color::bold << color::blue << " ...\n" << color::reset; + } + else // if filename differs, print " --> filename.toml" again + { + retval << color::bold << color::blue << " --> " << color::reset + << curr.first.file_name() << '\n'; + retval << make_string(line_num_width + 1, ' ') + << color::bold << color::blue << " |\n" << color::reset; + } + + format_one_location(retval, curr.first, curr.second); + } + + if(!helps.empty()) + { + retval << '\n'; + retval << make_string(line_num_width + 1, ' '); + retval << color::bold << color::blue << " |" << color::reset; + for(const auto& help : helps) + { + retval << color::bold << "\nHint: " << color::reset; + retval << help; + } + } + return retval.str(); +} + +} // detail +} // toml +#endif// TOML11_SOURCE_LOCATION_HPP diff --git a/src/toml11/toml/storage.hpp b/src/toml11/toml/storage.hpp new file mode 100644 index 000000000..202f9035f --- /dev/null +++ b/src/toml11/toml/storage.hpp @@ -0,0 +1,43 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_STORAGE_HPP +#define TOML11_STORAGE_HPP +#include "utility.hpp" + +namespace toml +{ +namespace detail +{ + +// this contains pointer and deep-copy the content if copied. +// to avoid recursive pointer. +template<typename T> +struct storage +{ + using value_type = T; + + explicit storage(value_type const& v): ptr(toml::make_unique<T>(v)) {} + explicit storage(value_type&& v): ptr(toml::make_unique<T>(std::move(v))) {} + ~storage() = default; + storage(const storage& rhs): ptr(toml::make_unique<T>(*rhs.ptr)) {} + storage& operator=(const storage& rhs) + { + this->ptr = toml::make_unique<T>(*rhs.ptr); + return *this; + } + storage(storage&&) = default; + storage& operator=(storage&&) = default; + + bool is_ok() const noexcept {return static_cast<bool>(ptr);} + + value_type& value() & noexcept {return *ptr;} + value_type const& value() const& noexcept {return *ptr;} + value_type&& value() && noexcept {return std::move(*ptr);} + + private: + std::unique_ptr<value_type> ptr; +}; + +} // detail +} // toml +#endif// TOML11_STORAGE_HPP diff --git a/src/toml11/toml/string.hpp b/src/toml11/toml/string.hpp new file mode 100644 index 000000000..5136d8c56 --- /dev/null +++ b/src/toml11/toml/string.hpp @@ -0,0 +1,225 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_STRING_HPP +#define TOML11_STRING_HPP +#include <cstdint> + +#include <algorithm> +#include <string> + +#if __cplusplus >= 201703L +#if __has_include(<string_view>) +#define TOML11_USING_STRING_VIEW 1 +#include <string_view> +#endif +#endif + +namespace toml +{ + +enum class string_t : std::uint8_t +{ + basic = 0, + literal = 1, +}; + +struct string +{ + string() = default; + ~string() = default; + string(const string& s) = default; + string(string&& s) = default; + string& operator=(const string& s) = default; + string& operator=(string&& s) = default; + + string(const std::string& s): kind(string_t::basic), str(s){} + string(const std::string& s, string_t k): kind(k), str(s){} + string(const char* s): kind(string_t::basic), str(s){} + string(const char* s, string_t k): kind(k), str(s){} + + string(std::string&& s): kind(string_t::basic), str(std::move(s)){} + string(std::string&& s, string_t k): kind(k), str(std::move(s)){} + + string& operator=(const std::string& s) + {kind = string_t::basic; str = s; return *this;} + string& operator=(std::string&& s) + {kind = string_t::basic; str = std::move(s); return *this;} + + operator std::string& () & noexcept {return str;} + operator std::string const& () const& noexcept {return str;} + operator std::string&& () && noexcept {return std::move(str);} + + string& operator+=(const char* rhs) {str += rhs; return *this;} + string& operator+=(const char rhs) {str += rhs; return *this;} + string& operator+=(const std::string& rhs) {str += rhs; return *this;} + string& operator+=(const string& rhs) {str += rhs.str; return *this;} + +#if defined(TOML11_USING_STRING_VIEW) && TOML11_USING_STRING_VIEW>0 + explicit string(std::string_view s): kind(string_t::basic), str(s){} + string(std::string_view s, string_t k): kind(k), str(s){} + + string& operator=(std::string_view s) + {kind = string_t::basic; str = s; return *this;} + + explicit operator std::string_view() const noexcept + {return std::string_view(str);} + + string& operator+=(const std::string_view& rhs) {str += rhs; return *this;} +#endif + + string_t kind; + std::string str; +}; + +inline bool operator==(const string& lhs, const string& rhs) +{ + return lhs.kind == rhs.kind && lhs.str == rhs.str; +} +inline bool operator!=(const string& lhs, const string& rhs) +{ + return !(lhs == rhs); +} +inline bool operator<(const string& lhs, const string& rhs) +{ + return (lhs.kind == rhs.kind) ? (lhs.str < rhs.str) : (lhs.kind < rhs.kind); +} +inline bool operator>(const string& lhs, const string& rhs) +{ + return rhs < lhs; +} +inline bool operator<=(const string& lhs, const string& rhs) +{ + return !(rhs < lhs); +} +inline bool operator>=(const string& lhs, const string& rhs) +{ + return !(lhs < rhs); +} + +inline bool +operator==(const string& lhs, const std::string& rhs) {return lhs.str == rhs;} +inline bool +operator!=(const string& lhs, const std::string& rhs) {return lhs.str != rhs;} +inline bool +operator< (const string& lhs, const std::string& rhs) {return lhs.str < rhs;} +inline bool +operator> (const string& lhs, const std::string& rhs) {return lhs.str > rhs;} +inline bool +operator<=(const string& lhs, const std::string& rhs) {return lhs.str <= rhs;} +inline bool +operator>=(const string& lhs, const std::string& rhs) {return lhs.str >= rhs;} + +inline bool +operator==(const std::string& lhs, const string& rhs) {return lhs == rhs.str;} +inline bool +operator!=(const std::string& lhs, const string& rhs) {return lhs != rhs.str;} +inline bool +operator< (const std::string& lhs, const string& rhs) {return lhs < rhs.str;} +inline bool +operator> (const std::string& lhs, const string& rhs) {return lhs > rhs.str;} +inline bool +operator<=(const std::string& lhs, const string& rhs) {return lhs <= rhs.str;} +inline bool +operator>=(const std::string& lhs, const string& rhs) {return lhs >= rhs.str;} + +inline bool +operator==(const string& lhs, const char* rhs) {return lhs.str == std::string(rhs);} +inline bool +operator!=(const string& lhs, const char* rhs) {return lhs.str != std::string(rhs);} +inline bool +operator< (const string& lhs, const char* rhs) {return lhs.str < std::string(rhs);} +inline bool +operator> (const string& lhs, const char* rhs) {return lhs.str > std::string(rhs);} +inline bool +operator<=(const string& lhs, const char* rhs) {return lhs.str <= std::string(rhs);} +inline bool +operator>=(const string& lhs, const char* rhs) {return lhs.str >= std::string(rhs);} + +inline bool +operator==(const char* lhs, const string& rhs) {return std::string(lhs) == rhs.str;} +inline bool +operator!=(const char* lhs, const string& rhs) {return std::string(lhs) != rhs.str;} +inline bool +operator< (const char* lhs, const string& rhs) {return std::string(lhs) < rhs.str;} +inline bool +operator> (const char* lhs, const string& rhs) {return std::string(lhs) > rhs.str;} +inline bool +operator<=(const char* lhs, const string& rhs) {return std::string(lhs) <= rhs.str;} +inline bool +operator>=(const char* lhs, const string& rhs) {return std::string(lhs) >= rhs.str;} + +template<typename charT, typename traits> +std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, const string& s) +{ + if(s.kind == string_t::basic) + { + if(std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend()) + { + // it contains newline. make it multiline string. + os << "\"\"\"\n"; + for(auto i=s.str.cbegin(), e=s.str.cend(); i!=e; ++i) + { + switch(*i) + { + case '\\': {os << "\\\\"; break;} + case '\"': {os << "\\\""; break;} + case '\b': {os << "\\b"; break;} + case '\t': {os << "\\t"; break;} + case '\f': {os << "\\f"; break;} + case '\n': {os << '\n'; break;} + case '\r': + { + // since it is a multiline string, + // CRLF is not needed to be escaped. + if(std::next(i) != e && *std::next(i) == '\n') + { + os << "\r\n"; + ++i; + } + else + { + os << "\\r"; + } + break; + } + default: {os << *i; break;} + } + } + os << "\\\n\"\"\""; + return os; + } + // no newline. make it inline. + os << "\""; + for(const auto c : s.str) + { + switch(c) + { + case '\\': {os << "\\\\"; break;} + case '\"': {os << "\\\""; break;} + case '\b': {os << "\\b"; break;} + case '\t': {os << "\\t"; break;} + case '\f': {os << "\\f"; break;} + case '\n': {os << "\\n"; break;} + case '\r': {os << "\\r"; break;} + default : {os << c; break;} + } + } + os << "\""; + return os; + } + // the string `s` is literal-string. + if(std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend() || + std::find(s.str.cbegin(), s.str.cend(), '\'') != s.str.cend() ) + { + // contains newline or single quote. make it multiline. + os << "'''\n" << s.str << "'''"; + return os; + } + // normal literal string + os << '\'' << s.str << '\''; + return os; +} + +} // toml +#endif// TOML11_STRING_H diff --git a/src/toml11/toml/traits.hpp b/src/toml11/toml/traits.hpp new file mode 100644 index 000000000..5495c93b2 --- /dev/null +++ b/src/toml11/toml/traits.hpp @@ -0,0 +1,327 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_TRAITS_HPP +#define TOML11_TRAITS_HPP + +#include "from.hpp" +#include "into.hpp" + +#include <chrono> +#include <forward_list> +#include <string> +#include <tuple> +#include <type_traits> +#include <utility> + +#if __cplusplus >= 201703L +#if __has_include(<string_view>) +#include <string_view> +#endif // has_include(<string_view>) +#endif // cplusplus >= C++17 + +namespace toml +{ +template<typename C, template<typename ...> class T, template<typename ...> class A> +class basic_value; + +namespace detail +{ +// --------------------------------------------------------------------------- +// check whether type T is a kind of container/map class + +struct has_iterator_impl +{ + template<typename T> static std::true_type check(typename T::iterator*); + template<typename T> static std::false_type check(...); +}; +struct has_value_type_impl +{ + template<typename T> static std::true_type check(typename T::value_type*); + template<typename T> static std::false_type check(...); +}; +struct has_key_type_impl +{ + template<typename T> static std::true_type check(typename T::key_type*); + template<typename T> static std::false_type check(...); +}; +struct has_mapped_type_impl +{ + template<typename T> static std::true_type check(typename T::mapped_type*); + template<typename T> static std::false_type check(...); +}; +struct has_reserve_method_impl +{ + template<typename T> static std::false_type check(...); + template<typename T> static std::true_type check( + decltype(std::declval<T>().reserve(std::declval<std::size_t>()))*); +}; +struct has_push_back_method_impl +{ + template<typename T> static std::false_type check(...); + template<typename T> static std::true_type check( + decltype(std::declval<T>().push_back(std::declval<typename T::value_type>()))*); +}; +struct is_comparable_impl +{ + template<typename T> static std::false_type check(...); + template<typename T> static std::true_type check( + decltype(std::declval<T>() < std::declval<T>())*); +}; + +struct has_from_toml_method_impl +{ + template<typename T, typename C, + template<typename ...> class Tb, template<typename ...> class A> + static std::true_type check( + decltype(std::declval<T>().from_toml( + std::declval<::toml::basic_value<C, Tb, A>>()))*); + + template<typename T, typename C, + template<typename ...> class Tb, template<typename ...> class A> + static std::false_type check(...); +}; +struct has_into_toml_method_impl +{ + template<typename T> + static std::true_type check(decltype(std::declval<T>().into_toml())*); + template<typename T> + static std::false_type check(...); +}; + +struct has_specialized_from_impl +{ + template<typename T> + static std::false_type check(...); + template<typename T, std::size_t S = sizeof(::toml::from<T>)> + static std::true_type check(::toml::from<T>*); +}; +struct has_specialized_into_impl +{ + template<typename T> + static std::false_type check(...); + template<typename T, std::size_t S = sizeof(::toml::into<T>)> + static std::true_type check(::toml::from<T>*); +}; + + +/// Intel C++ compiler can not use decltype in parent class declaration, here +/// is a hack to work around it. https://stackoverflow.com/a/23953090/4692076 +#ifdef __INTEL_COMPILER +#define decltype(...) std::enable_if<true, decltype(__VA_ARGS__)>::type +#endif + +template<typename T> +struct has_iterator : decltype(has_iterator_impl::check<T>(nullptr)){}; +template<typename T> +struct has_value_type : decltype(has_value_type_impl::check<T>(nullptr)){}; +template<typename T> +struct has_key_type : decltype(has_key_type_impl::check<T>(nullptr)){}; +template<typename T> +struct has_mapped_type : decltype(has_mapped_type_impl::check<T>(nullptr)){}; +template<typename T> +struct has_reserve_method : decltype(has_reserve_method_impl::check<T>(nullptr)){}; +template<typename T> +struct has_push_back_method : decltype(has_push_back_method_impl::check<T>(nullptr)){}; +template<typename T> +struct is_comparable : decltype(is_comparable_impl::check<T>(nullptr)){}; + +template<typename T, typename C, + template<typename ...> class Tb, template<typename ...> class A> +struct has_from_toml_method +: decltype(has_from_toml_method_impl::check<T, C, Tb, A>(nullptr)){}; + +template<typename T> +struct has_into_toml_method +: decltype(has_into_toml_method_impl::check<T>(nullptr)){}; + +template<typename T> +struct has_specialized_from : decltype(has_specialized_from_impl::check<T>(nullptr)){}; +template<typename T> +struct has_specialized_into : decltype(has_specialized_into_impl::check<T>(nullptr)){}; + +#ifdef __INTEL_COMPILER +#undef decltype +#endif + +// --------------------------------------------------------------------------- +// C++17 and/or/not + +#if __cplusplus >= 201703L + +using std::conjunction; +using std::disjunction; +using std::negation; + +#else + +template<typename ...> struct conjunction : std::true_type{}; +template<typename T> struct conjunction<T> : T{}; +template<typename T, typename ... Ts> +struct conjunction<T, Ts...> : + std::conditional<static_cast<bool>(T::value), conjunction<Ts...>, T>::type +{}; + +template<typename ...> struct disjunction : std::false_type{}; +template<typename T> struct disjunction<T> : T {}; +template<typename T, typename ... Ts> +struct disjunction<T, Ts...> : + std::conditional<static_cast<bool>(T::value), T, disjunction<Ts...>>::type +{}; + +template<typename T> +struct negation : std::integral_constant<bool, !static_cast<bool>(T::value)>{}; + +#endif + +// --------------------------------------------------------------------------- +// type checkers + +template<typename T> struct is_std_pair : std::false_type{}; +template<typename T1, typename T2> +struct is_std_pair<std::pair<T1, T2>> : std::true_type{}; + +template<typename T> struct is_std_tuple : std::false_type{}; +template<typename ... Ts> +struct is_std_tuple<std::tuple<Ts...>> : std::true_type{}; + +template<typename T> struct is_std_forward_list : std::false_type{}; +template<typename T> +struct is_std_forward_list<std::forward_list<T>> : std::true_type{}; + +template<typename T> struct is_chrono_duration: std::false_type{}; +template<typename Rep, typename Period> +struct is_chrono_duration<std::chrono::duration<Rep, Period>>: std::true_type{}; + +template<typename T> +struct is_map : conjunction< // map satisfies all the following conditions + has_iterator<T>, // has T::iterator + has_value_type<T>, // has T::value_type + has_key_type<T>, // has T::key_type + has_mapped_type<T> // has T::mapped_type + >{}; +template<typename T> struct is_map<T&> : is_map<T>{}; +template<typename T> struct is_map<T const&> : is_map<T>{}; +template<typename T> struct is_map<T volatile&> : is_map<T>{}; +template<typename T> struct is_map<T const volatile&> : is_map<T>{}; + +template<typename T> +struct is_container : conjunction< + negation<is_map<T>>, // not a map + negation<std::is_same<T, std::string>>, // not a std::string +#if __cplusplus >= 201703L +#if __has_include(<string_view>) + negation<std::is_same<T, std::string_view>>, // not a std::string_view +#endif // has_include(<string_view>) +#endif + has_iterator<T>, // has T::iterator + has_value_type<T> // has T::value_type + >{}; +template<typename T> struct is_container<T&> : is_container<T>{}; +template<typename T> struct is_container<T const&> : is_container<T>{}; +template<typename T> struct is_container<T volatile&> : is_container<T>{}; +template<typename T> struct is_container<T const volatile&> : is_container<T>{}; + +template<typename T> +struct is_basic_value: std::false_type{}; +template<typename T> struct is_basic_value<T&> : is_basic_value<T>{}; +template<typename T> struct is_basic_value<T const&> : is_basic_value<T>{}; +template<typename T> struct is_basic_value<T volatile&> : is_basic_value<T>{}; +template<typename T> struct is_basic_value<T const volatile&> : is_basic_value<T>{}; +template<typename C, template<typename ...> class M, template<typename ...> class V> +struct is_basic_value<::toml::basic_value<C, M, V>>: std::true_type{}; + +// --------------------------------------------------------------------------- +// C++14 index_sequence + +#if __cplusplus >= 201402L + +using std::index_sequence; +using std::make_index_sequence; + +#else + +template<std::size_t ... Ns> struct index_sequence{}; + +template<typename IS, std::size_t N> struct push_back_index_sequence{}; +template<std::size_t N, std::size_t ... Ns> +struct push_back_index_sequence<index_sequence<Ns...>, N> +{ + typedef index_sequence<Ns..., N> type; +}; + +template<std::size_t N> +struct index_sequence_maker +{ + typedef typename push_back_index_sequence< + typename index_sequence_maker<N-1>::type, N>::type type; +}; +template<> +struct index_sequence_maker<0> +{ + typedef index_sequence<0> type; +}; +template<std::size_t N> +using make_index_sequence = typename index_sequence_maker<N-1>::type; + +#endif // __cplusplus >= 2014 + +// --------------------------------------------------------------------------- +// C++14 enable_if_t + +#if __cplusplus >= 201402L + +using std::enable_if_t; + +#else + +template<bool B, typename T> +using enable_if_t = typename std::enable_if<B, T>::type; + +#endif // __cplusplus >= 2014 + +// --------------------------------------------------------------------------- +// return_type_of_t + +#if __cplusplus >= 201703L && defined(__cpp_lib_is_invocable) && __cpp_lib_is_invocable>=201703 + +template<typename F, typename ... Args> +using return_type_of_t = std::invoke_result_t<F, Args...>; + +#else +// result_of is deprecated after C++17 +template<typename F, typename ... Args> +using return_type_of_t = typename std::result_of<F(Args...)>::type; + +#endif + +// --------------------------------------------------------------------------- +// is_string_literal +// +// to use this, pass `typename remove_reference<T>::type` to T. + +template<typename T> +struct is_string_literal: +disjunction< + std::is_same<const char*, T>, + conjunction< + std::is_array<T>, + std::is_same<const char, typename std::remove_extent<T>::type> + > + >{}; + +// --------------------------------------------------------------------------- +// C++20 remove_cvref_t + +template<typename T> +struct remove_cvref +{ + using type = typename std::remove_cv< + typename std::remove_reference<T>::type>::type; +}; + +template<typename T> +using remove_cvref_t = typename remove_cvref<T>::type; + +}// detail +}//toml +#endif // TOML_TRAITS diff --git a/src/toml11/toml/types.hpp b/src/toml11/toml/types.hpp new file mode 100644 index 000000000..1e420e7fd --- /dev/null +++ b/src/toml11/toml/types.hpp @@ -0,0 +1,173 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_TYPES_HPP +#define TOML11_TYPES_HPP +#include <unordered_map> +#include <vector> + +#include "comments.hpp" +#include "datetime.hpp" +#include "string.hpp" +#include "traits.hpp" + +namespace toml +{ + +template<typename Comment, // discard/preserve_comment + template<typename ...> class Table, // map-like class + template<typename ...> class Array> // vector-like class +class basic_value; + +using character = char; +using key = std::string; + +#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ <= 4 +# pragma GCC diagnostic push +# pragma GCC diagnostic ignored "-Wshadow" +#endif + +using boolean = bool; +using integer = std::int64_t; +using floating = double; // "float" is a keyword, cannot use it here. +// the following stuffs are structs defined here, so aliases are not needed. +// - string +// - offset_datetime +// - offset_datetime +// - local_datetime +// - local_date +// - local_time + +#if defined(__GNUC__) && !defined(__clang__) +# pragma GCC diagnostic pop +#endif + +// default toml::value and default array/table. these are defined after defining +// basic_value itself. +// using value = basic_value<discard_comments, std::unordered_map, std::vector>; +// using array = typename value::array_type; +// using table = typename value::table_type; + +// to avoid warnings about `value_t::integer` is "shadowing" toml::integer in +// GCC -Wshadow=global. +#if defined(__GNUC__) && !defined(__clang__) +# pragma GCC diagnostic push +# if 7 <= __GNUC__ +# pragma GCC diagnostic ignored "-Wshadow=global" +# else // gcc-6 or older +# pragma GCC diagnostic ignored "-Wshadow" +# endif +#endif +enum class value_t : std::uint8_t +{ + empty = 0, + boolean = 1, + integer = 2, + floating = 3, + string = 4, + offset_datetime = 5, + local_datetime = 6, + local_date = 7, + local_time = 8, + array = 9, + table = 10, +}; +#if defined(__GNUC__) && !defined(__clang__) +# pragma GCC diagnostic pop +#endif + +template<typename charT, typename traits> +inline std::basic_ostream<charT, traits>& +operator<<(std::basic_ostream<charT, traits>& os, value_t t) +{ + switch(t) + { + case value_t::boolean : os << "boolean"; return os; + case value_t::integer : os << "integer"; return os; + case value_t::floating : os << "floating"; return os; + case value_t::string : os << "string"; return os; + case value_t::offset_datetime : os << "offset_datetime"; return os; + case value_t::local_datetime : os << "local_datetime"; return os; + case value_t::local_date : os << "local_date"; return os; + case value_t::local_time : os << "local_time"; return os; + case value_t::array : os << "array"; return os; + case value_t::table : os << "table"; return os; + case value_t::empty : os << "empty"; return os; + default : os << "unknown"; return os; + } +} + +template<typename charT = char, + typename traits = std::char_traits<charT>, + typename alloc = std::allocator<charT>> +inline std::basic_string<charT, traits, alloc> stringize(value_t t) +{ + std::basic_ostringstream<charT, traits, alloc> oss; + oss << t; + return oss.str(); +} + +namespace detail +{ + +// helper to define a type that represents a value_t value. +template<value_t V> +using value_t_constant = std::integral_constant<value_t, V>; + +// meta-function that convertes from value_t to the exact toml type that corresponds to. +// It takes toml::basic_value type because array and table types depend on it. +template<value_t t, typename Value> struct enum_to_type {using type = void ;}; +template<typename Value> struct enum_to_type<value_t::empty , Value>{using type = void ;}; +template<typename Value> struct enum_to_type<value_t::boolean , Value>{using type = boolean ;}; +template<typename Value> struct enum_to_type<value_t::integer , Value>{using type = integer ;}; +template<typename Value> struct enum_to_type<value_t::floating , Value>{using type = floating ;}; +template<typename Value> struct enum_to_type<value_t::string , Value>{using type = string ;}; +template<typename Value> struct enum_to_type<value_t::offset_datetime, Value>{using type = offset_datetime ;}; +template<typename Value> struct enum_to_type<value_t::local_datetime , Value>{using type = local_datetime ;}; +template<typename Value> struct enum_to_type<value_t::local_date , Value>{using type = local_date ;}; +template<typename Value> struct enum_to_type<value_t::local_time , Value>{using type = local_time ;}; +template<typename Value> struct enum_to_type<value_t::array , Value>{using type = typename Value::array_type;}; +template<typename Value> struct enum_to_type<value_t::table , Value>{using type = typename Value::table_type;}; + +// meta-function that converts from an exact toml type to the enum that corresponds to. +template<typename T, typename Value> +struct type_to_enum : std::conditional< + std::is_same<T, typename Value::array_type>::value, // if T == array_type, + value_t_constant<value_t::array>, // then value_t::array + typename std::conditional< // else... + std::is_same<T, typename Value::table_type>::value, // if T == table_type + value_t_constant<value_t::table>, // then value_t::table + value_t_constant<value_t::empty> // else value_t::empty + >::type + >::type {}; +template<typename Value> struct type_to_enum<boolean , Value>: value_t_constant<value_t::boolean > {}; +template<typename Value> struct type_to_enum<integer , Value>: value_t_constant<value_t::integer > {}; +template<typename Value> struct type_to_enum<floating , Value>: value_t_constant<value_t::floating > {}; +template<typename Value> struct type_to_enum<string , Value>: value_t_constant<value_t::string > {}; +template<typename Value> struct type_to_enum<offset_datetime, Value>: value_t_constant<value_t::offset_datetime> {}; +template<typename Value> struct type_to_enum<local_datetime , Value>: value_t_constant<value_t::local_datetime > {}; +template<typename Value> struct type_to_enum<local_date , Value>: value_t_constant<value_t::local_date > {}; +template<typename Value> struct type_to_enum<local_time , Value>: value_t_constant<value_t::local_time > {}; + +// meta-function that checks the type T is the same as one of the toml::* types. +template<typename T, typename Value> +struct is_exact_toml_type : disjunction< + std::is_same<T, boolean >, + std::is_same<T, integer >, + std::is_same<T, floating >, + std::is_same<T, string >, + std::is_same<T, offset_datetime>, + std::is_same<T, local_datetime >, + std::is_same<T, local_date >, + std::is_same<T, local_time >, + std::is_same<T, typename Value::array_type>, + std::is_same<T, typename Value::table_type> + >{}; +template<typename T, typename V> struct is_exact_toml_type<T&, V> : is_exact_toml_type<T, V>{}; +template<typename T, typename V> struct is_exact_toml_type<T const&, V> : is_exact_toml_type<T, V>{}; +template<typename T, typename V> struct is_exact_toml_type<T volatile&, V> : is_exact_toml_type<T, V>{}; +template<typename T, typename V> struct is_exact_toml_type<T const volatile&, V>: is_exact_toml_type<T, V>{}; + +} // detail +} // toml + +#endif// TOML11_TYPES_H diff --git a/src/toml11/toml/utility.hpp b/src/toml11/toml/utility.hpp new file mode 100644 index 000000000..4a6b4309d --- /dev/null +++ b/src/toml11/toml/utility.hpp @@ -0,0 +1,149 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_UTILITY_HPP +#define TOML11_UTILITY_HPP +#include <memory> +#include <sstream> +#include <utility> + +#include "traits.hpp" + +#if __cplusplus >= 201402L +# define TOML11_MARK_AS_DEPRECATED(msg) [[deprecated(msg)]] +#elif defined(__GNUC__) +# define TOML11_MARK_AS_DEPRECATED(msg) __attribute__((deprecated(msg))) +#elif defined(_MSC_VER) +# define TOML11_MARK_AS_DEPRECATED(msg) __declspec(deprecated(msg)) +#else +# define TOML11_MARK_AS_DEPRECATED +#endif + +namespace toml +{ + +#if __cplusplus >= 201402L + +using std::make_unique; + +#else + +template<typename T, typename ... Ts> +inline std::unique_ptr<T> make_unique(Ts&& ... args) +{ + return std::unique_ptr<T>(new T(std::forward<Ts>(args)...)); +} + +#endif // __cplusplus >= 2014 + +namespace detail +{ +template<typename Container> +void try_reserve_impl(Container& container, std::size_t N, std::true_type) +{ + container.reserve(N); + return; +} +template<typename Container> +void try_reserve_impl(Container&, std::size_t, std::false_type) noexcept +{ + return; +} +} // detail + +template<typename Container> +void try_reserve(Container& container, std::size_t N) +{ + if(N <= container.size()) {return;} + detail::try_reserve_impl(container, N, detail::has_reserve_method<Container>{}); + return; +} + +namespace detail +{ +inline std::string concat_to_string_impl(std::ostringstream& oss) +{ + return oss.str(); +} +template<typename T, typename ... Ts> +std::string concat_to_string_impl(std::ostringstream& oss, T&& head, Ts&& ... tail) +{ + oss << std::forward<T>(head); + return concat_to_string_impl(oss, std::forward<Ts>(tail) ... ); +} +} // detail + +template<typename ... Ts> +std::string concat_to_string(Ts&& ... args) +{ + std::ostringstream oss; + oss << std::boolalpha << std::fixed; + return detail::concat_to_string_impl(oss, std::forward<Ts>(args) ...); +} + +template<typename T> +T from_string(const std::string& str, T opt) +{ + T v(opt); + std::istringstream iss(str); + iss >> v; + return v; +} + +namespace detail +{ +#if __cplusplus >= 201402L +template<typename T> +decltype(auto) last_one(T&& tail) noexcept +{ + return std::forward<T>(tail); +} + +template<typename T, typename ... Ts> +decltype(auto) last_one(T&& /*head*/, Ts&& ... tail) noexcept +{ + return last_one(std::forward<Ts>(tail)...); +} +#else // C++11 +// The following code +// ```cpp +// 1 | template<typename T, typename ... Ts> +// 2 | auto last_one(T&& /*head*/, Ts&& ... tail) +// 3 | -> decltype(last_one(std::forward<Ts>(tail)...)) +// 4 | { +// 5 | return last_one(std::forward<Ts>(tail)...); +// 6 | } +// ``` +// does not work because the function `last_one(...)` is not yet defined at +// line #3, so `decltype()` cannot deduce the type returned from `last_one`. +// So we need to determine return type in a different way, like a meta func. + +template<typename T, typename ... Ts> +struct last_one_in_pack +{ + using type = typename last_one_in_pack<Ts...>::type; +}; +template<typename T> +struct last_one_in_pack<T> +{ + using type = T; +}; +template<typename ... Ts> +using last_one_in_pack_t = typename last_one_in_pack<Ts...>::type; + +template<typename T> +T&& last_one(T&& tail) noexcept +{ + return std::forward<T>(tail); +} +template<typename T, typename ... Ts> +enable_if_t<(sizeof...(Ts) > 0), last_one_in_pack_t<Ts&& ...>> +last_one(T&& /*head*/, Ts&& ... tail) +{ + return last_one(std::forward<Ts>(tail)...); +} + +#endif +} // detail + +}// toml +#endif // TOML11_UTILITY diff --git a/src/toml11/toml/value.hpp b/src/toml11/toml/value.hpp new file mode 100644 index 000000000..1b43db8d4 --- /dev/null +++ b/src/toml11/toml/value.hpp @@ -0,0 +1,2035 @@ +// Copyright Toru Niina 2017. +// Distributed under the MIT License. +#ifndef TOML11_VALUE_HPP +#define TOML11_VALUE_HPP +#include <cassert> + +#include "comments.hpp" +#include "exception.hpp" +#include "into.hpp" +#include "region.hpp" +#include "source_location.hpp" +#include "storage.hpp" +#include "traits.hpp" +#include "types.hpp" +#include "utility.hpp" + +namespace toml +{ + +namespace detail +{ + +// to show error messages. not recommended for users. +template<typename Value> +inline region_base const* get_region(const Value& v) +{ + return v.region_info_.get(); +} + +template<typename Value> +void change_region(Value& v, region reg) +{ + v.region_info_ = std::make_shared<region>(std::move(reg)); + return; +} + +template<value_t Expected, typename Value> +[[noreturn]] inline void +throw_bad_cast(const std::string& funcname, value_t actual, const Value& v) +{ + throw type_error(detail::format_underline( + concat_to_string(funcname, "bad_cast to ", Expected), { + {v.location(), concat_to_string("the actual type is ", actual)} + }), v.location()); +} + +// Throw `out_of_range` from `toml::value::at()` and `toml::find()` +// after generating an error message. +// +// The implementation is a bit complicated and there are many edge-cases. +// If you are not interested in the error message generation, just skip this. +template<typename Value> +[[noreturn]] void +throw_key_not_found_error(const Value& v, const key& ky) +{ + // The top-level table has its region at the first character of the file. + // That means that, in the case when a key is not found in the top-level + // table, the error message points to the first character. If the file has + // its first table at the first line, the error message would be like this. + // ```console + // [error] key "a" not found + // --> example.toml + // | + // 1 | [table] + // | ^------ in this table + // ``` + // It actually points to the top-level table at the first character, + // not `[table]`. But it is too confusing. To avoid the confusion, the error + // message should explicitly say "key not found in the top-level table", + // or "the parsed file is empty" if there is no content at all (0 bytes in file). + const auto loc = v.location(); + if(loc.line() == 1 && loc.region() == 0) + { + // First line with a zero-length region means "empty file". + // The region will be generated at `parse_toml_file` function + // if the file contains no bytes. + throw std::out_of_range(format_underline(concat_to_string( + "key \"", ky, "\" not found in the top-level table"), { + {loc, "the parsed file is empty"} + })); + } + else if(loc.line() == 1 && loc.region() == 1) + { + // Here it assumes that top-level table starts at the first character. + // The region corresponds to the top-level table will be generated at + // `parse_toml_file` function. + // It also assumes that the top-level table size is just one and + // the line number is `1`. It is always satisfied. And those conditions + // are satisfied only if the table is the top-level table. + // + // 1. one-character dot-key at the first line + // ```toml + // a.b = "c" + // ``` + // toml11 counts whole key as the table key. Here, `a.b` is the region + // of the table "a". It could be counter intuitive, but it works. + // The size of the region is 3, not 1. The above example is the shortest + // dot-key example. The size cannot be 1. + // + // 2. one-character inline-table at the first line + // ```toml + // a = {b = "c"} + // ``` + // toml11 considers the inline table body as the table region. Here, + // `{b = "c"}` is the region of the table "a". The size of the region + // is 9, not 1. The shotest inline table still has two characters, `{` + // and `}`. The size cannot be 1. + // + // 3. one-character table declaration at the first line + // ```toml + // [a] + // ``` + // toml11 considers the whole table key as the table region. Here, + // `[a]` is the table region. The size is 3, not 1. + // + throw std::out_of_range(format_underline(concat_to_string( + "key \"", ky, "\" not found in the top-level table"), { + {loc, "the top-level table starts here"} + })); + } + else + { + // normal table. + throw std::out_of_range(format_underline(concat_to_string( + "key \"", ky, "\" not found"), { {loc, "in this table"} })); + } +} + +// switch by `value_t` at the compile time. +template<value_t T> +struct switch_cast {}; +#define TOML11_GENERATE_SWITCH_CASTER(TYPE) \ + template<> \ + struct switch_cast<value_t::TYPE> \ + { \ + template<typename Value> \ + static typename Value::TYPE##_type& invoke(Value& v) \ + { \ + return v.as_##TYPE(); \ + } \ + template<typename Value> \ + static typename Value::TYPE##_type const& invoke(const Value& v) \ + { \ + return v.as_##TYPE(); \ + } \ + template<typename Value> \ + static typename Value::TYPE##_type&& invoke(Value&& v) \ + { \ + return std::move(v).as_##TYPE(); \ + } \ + }; \ + /**/ +TOML11_GENERATE_SWITCH_CASTER(boolean) +TOML11_GENERATE_SWITCH_CASTER(integer) +TOML11_GENERATE_SWITCH_CASTER(floating) +TOML11_GENERATE_SWITCH_CASTER(string) +TOML11_GENERATE_SWITCH_CASTER(offset_datetime) +TOML11_GENERATE_SWITCH_CASTER(local_datetime) +TOML11_GENERATE_SWITCH_CASTER(local_date) +TOML11_GENERATE_SWITCH_CASTER(local_time) +TOML11_GENERATE_SWITCH_CASTER(array) +TOML11_GENERATE_SWITCH_CASTER(table) + +#undef TOML11_GENERATE_SWITCH_CASTER + +}// detail + +template<typename Comment, // discard/preserve_comment + template<typename ...> class Table = std::unordered_map, + template<typename ...> class Array = std::vector> +class basic_value +{ + template<typename T, typename U> + static void assigner(T& dst, U&& v) + { + const auto tmp = ::new(std::addressof(dst)) T(std::forward<U>(v)); + assert(tmp == std::addressof(dst)); + (void)tmp; + } + + using region_base = detail::region_base; + + template<typename C, template<typename ...> class T, + template<typename ...> class A> + friend class basic_value; + + public: + + using comment_type = Comment; + using key_type = ::toml::key; + using value_type = basic_value<comment_type, Table, Array>; + using boolean_type = ::toml::boolean; + using integer_type = ::toml::integer; + using floating_type = ::toml::floating; + using string_type = ::toml::string; + using local_time_type = ::toml::local_time; + using local_date_type = ::toml::local_date; + using local_datetime_type = ::toml::local_datetime; + using offset_datetime_type = ::toml::offset_datetime; + using array_type = Array<value_type>; + using table_type = Table<key_type, value_type>; + + public: + + basic_value() noexcept + : type_(value_t::empty), + region_info_(std::make_shared<region_base>(region_base{})) + {} + ~basic_value() noexcept {this->cleanup();} + + basic_value(const basic_value& v) + : type_(v.type()), region_info_(v.region_info_), comments_(v.comments_) + { + switch(v.type()) + { + case value_t::boolean : assigner(boolean_ , v.boolean_ ); break; + case value_t::integer : assigner(integer_ , v.integer_ ); break; + case value_t::floating : assigner(floating_ , v.floating_ ); break; + case value_t::string : assigner(string_ , v.string_ ); break; + case value_t::offset_datetime: assigner(offset_datetime_, v.offset_datetime_); break; + case value_t::local_datetime : assigner(local_datetime_ , v.local_datetime_ ); break; + case value_t::local_date : assigner(local_date_ , v.local_date_ ); break; + case value_t::local_time : assigner(local_time_ , v.local_time_ ); break; + case value_t::array : assigner(array_ , v.array_ ); break; + case value_t::table : assigner(table_ , v.table_ ); break; + default: break; + } + } + basic_value(basic_value&& v) + : type_(v.type()), region_info_(std::move(v.region_info_)), + comments_(std::move(v.comments_)) + { + switch(this->type_) // here this->type_ is already initialized + { + case value_t::boolean : assigner(boolean_ , std::move(v.boolean_ )); break; + case value_t::integer : assigner(integer_ , std::move(v.integer_ )); break; + case value_t::floating : assigner(floating_ , std::move(v.floating_ )); break; + case value_t::string : assigner(string_ , std::move(v.string_ )); break; + case value_t::offset_datetime: assigner(offset_datetime_, std::move(v.offset_datetime_)); break; + case value_t::local_datetime : assigner(local_datetime_ , std::move(v.local_datetime_ )); break; + case value_t::local_date : assigner(local_date_ , std::move(v.local_date_ )); break; + case value_t::local_time : assigner(local_time_ , std::move(v.local_time_ )); break; + case value_t::array : assigner(array_ , std::move(v.array_ )); break; + case value_t::table : assigner(table_ , std::move(v.table_ )); break; + default: break; + } + } + basic_value& operator=(const basic_value& v) + { + this->cleanup(); + this->region_info_ = v.region_info_; + this->comments_ = v.comments_; + this->type_ = v.type(); + switch(this->type_) + { + case value_t::boolean : assigner(boolean_ , v.boolean_ ); break; + case value_t::integer : assigner(integer_ , v.integer_ ); break; + case value_t::floating : assigner(floating_ , v.floating_ ); break; + case value_t::string : assigner(string_ , v.string_ ); break; + case value_t::offset_datetime: assigner(offset_datetime_, v.offset_datetime_); break; + case value_t::local_datetime : assigner(local_datetime_ , v.local_datetime_ ); break; + case value_t::local_date : assigner(local_date_ , v.local_date_ ); break; + case value_t::local_time : assigner(local_time_ , v.local_time_ ); break; + case value_t::array : assigner(array_ , v.array_ ); break; + case value_t::table : assigner(table_ , v.table_ ); break; + default: break; + } + return *this; + } + basic_value& operator=(basic_value&& v) + { + this->cleanup(); + this->region_info_ = std::move(v.region_info_); + this->comments_ = std::move(v.comments_); + this->type_ = v.type(); + switch(this->type_) + { + case value_t::boolean : assigner(boolean_ , std::move(v.boolean_ )); break; + case value_t::integer : assigner(integer_ , std::move(v.integer_ )); break; + case value_t::floating : assigner(floating_ , std::move(v.floating_ )); break; + case value_t::string : assigner(string_ , std::move(v.string_ )); break; + case value_t::offset_datetime: assigner(offset_datetime_, std::move(v.offset_datetime_)); break; + case value_t::local_datetime : assigner(local_datetime_ , std::move(v.local_datetime_ )); break; + case value_t::local_date : assigner(local_date_ , std::move(v.local_date_ )); break; + case value_t::local_time : assigner(local_time_ , std::move(v.local_time_ )); break; + case value_t::array : assigner(array_ , std::move(v.array_ )); break; + case value_t::table : assigner(table_ , std::move(v.table_ )); break; + default: break; + } + return *this; + } + + // overwrite comments ---------------------------------------------------- + + basic_value(const basic_value& v, std::vector<std::string> com) + : type_(v.type()), region_info_(v.region_info_), + comments_(std::move(com)) + { + switch(v.type()) + { + case value_t::boolean : assigner(boolean_ , v.boolean_ ); break; + case value_t::integer : assigner(integer_ , v.integer_ ); break; + case value_t::floating : assigner(floating_ , v.floating_ ); break; + case value_t::string : assigner(string_ , v.string_ ); break; + case value_t::offset_datetime: assigner(offset_datetime_, v.offset_datetime_); break; + case value_t::local_datetime : assigner(local_datetime_ , v.local_datetime_ ); break; + case value_t::local_date : assigner(local_date_ , v.local_date_ ); break; + case value_t::local_time : assigner(local_time_ , v.local_time_ ); break; + case value_t::array : assigner(array_ , v.array_ ); break; + case value_t::table : assigner(table_ , v.table_ ); break; + default: break; + } + } + + basic_value(basic_value&& v, std::vector<std::string> com) + : type_(v.type()), region_info_(std::move(v.region_info_)), + comments_(std::move(com)) + { + switch(this->type_) // here this->type_ is already initialized + { + case value_t::boolean : assigner(boolean_ , std::move(v.boolean_ )); break; + case value_t::integer : assigner(integer_ , std::move(v.integer_ )); break; + case value_t::floating : assigner(floating_ , std::move(v.floating_ )); break; + case value_t::string : assigner(string_ , std::move(v.string_ )); break; + case value_t::offset_datetime: assigner(offset_datetime_, std::move(v.offset_datetime_)); break; + case value_t::local_datetime : assigner(local_datetime_ , std::move(v.local_datetime_ )); break; + case value_t::local_date : assigner(local_date_ , std::move(v.local_date_ )); break; + case value_t::local_time : assigner(local_time_ , std::move(v.local_time_ )); break; + case value_t::array : assigner(array_ , std::move(v.array_ )); break; + case value_t::table : assigner(table_ , std::move(v.table_ )); break; + default: break; + } + } + + // ----------------------------------------------------------------------- + // conversion between different basic_values. + template<typename C, + template<typename ...> class T, + template<typename ...> class A> + basic_value(const basic_value<C, T, A>& v) + : type_(v.type()), region_info_(v.region_info_), comments_(v.comments()) + { + switch(v.type()) + { + case value_t::boolean : assigner(boolean_ , v.boolean_ ); break; + case value_t::integer : assigner(integer_ , v.integer_ ); break; + case value_t::floating : assigner(floating_ , v.floating_ ); break; + case value_t::string : assigner(string_ , v.string_ ); break; + case value_t::offset_datetime: assigner(offset_datetime_, v.offset_datetime_); break; + case value_t::local_datetime : assigner(local_datetime_ , v.local_datetime_ ); break; + case value_t::local_date : assigner(local_date_ , v.local_date_ ); break; + case value_t::local_time : assigner(local_time_ , v.local_time_ ); break; + case value_t::array : + { + array_type tmp(v.as_array(std::nothrow).begin(), + v.as_array(std::nothrow).end()); + assigner(array_, std::move(tmp)); + break; + } + case value_t::table : + { + table_type tmp(v.as_table(std::nothrow).begin(), + v.as_table(std::nothrow).end()); + assigner(table_, std::move(tmp)); + break; + } + default: break; + } + } + template<typename C, + template<typename ...> class T, + template<typename ...> class A> + basic_value(const basic_value<C, T, A>& v, std::vector<std::string> com) + : type_(v.type()), region_info_(v.region_info_), + comments_(std::move(com)) + { + switch(v.type()) + { + case value_t::boolean : assigner(boolean_ , v.boolean_ ); break; + case value_t::integer : assigner(integer_ , v.integer_ ); break; + case value_t::floating : assigner(floating_ , v.floating_ ); break; + case value_t::string : assigner(string_ , v.string_ ); break; + case value_t::offset_datetime: assigner(offset_datetime_, v.offset_datetime_); break; + case value_t::local_datetime : assigner(local_datetime_ , v.local_datetime_ ); break; + case value_t::local_date : assigner(local_date_ , v.local_date_ ); break; + case value_t::local_time : assigner(local_time_ , v.local_time_ ); break; + case value_t::array : + { + array_type tmp(v.as_array(std::nothrow).begin(), + v.as_array(std::nothrow).end()); + assigner(array_, std::move(tmp)); + break; + } + case value_t::table : + { + table_type tmp(v.as_table(std::nothrow).begin(), + v.as_table(std::nothrow).end()); + assigner(table_, std::move(tmp)); + break; + } + default: break; + } + } + template<typename C, + template<typename ...> class T, + template<typename ...> class A> + basic_value& operator=(const basic_value<C, T, A>& v) + { + this->region_info_ = v.region_info_; + this->comments_ = comment_type(v.comments()); + this->type_ = v.type(); + switch(v.type()) + { + case value_t::boolean : assigner(boolean_ , v.boolean_ ); break; + case value_t::integer : assigner(integer_ , v.integer_ ); break; + case value_t::floating : assigner(floating_ , v.floating_ ); break; + case value_t::string : assigner(string_ , v.string_ ); break; + case value_t::offset_datetime: assigner(offset_datetime_, v.offset_datetime_); break; + case value_t::local_datetime : assigner(local_datetime_ , v.local_datetime_ ); break; + case value_t::local_date : assigner(local_date_ , v.local_date_ ); break; + case value_t::local_time : assigner(local_time_ , v.local_time_ ); break; + case value_t::array : + { + array_type tmp(v.as_array(std::nothrow).begin(), + v.as_array(std::nothrow).end()); + assigner(array_, std::move(tmp)); + break; + } + case value_t::table : + { + table_type tmp(v.as_table(std::nothrow).begin(), + v.as_table(std::nothrow).end()); + assigner(table_, std::move(tmp)); + break; + } + default: break; + } + return *this; + } + + // boolean ============================================================== + + basic_value(boolean b) + : type_(value_t::boolean), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->boolean_, b); + } + basic_value& operator=(boolean b) + { + this->cleanup(); + this->type_ = value_t::boolean; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->boolean_, b); + return *this; + } + basic_value(boolean b, std::vector<std::string> com) + : type_(value_t::boolean), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->boolean_, b); + } + + // integer ============================================================== + + template<typename T, typename std::enable_if<detail::conjunction< + std::is_integral<T>, detail::negation<std::is_same<T, boolean>>>::value, + std::nullptr_t>::type = nullptr> + basic_value(T i) + : type_(value_t::integer), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->integer_, static_cast<integer>(i)); + } + + template<typename T, typename std::enable_if<detail::conjunction< + std::is_integral<T>, detail::negation<std::is_same<T, boolean>>>::value, + std::nullptr_t>::type = nullptr> + basic_value& operator=(T i) + { + this->cleanup(); + this->type_ = value_t::integer; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->integer_, static_cast<integer>(i)); + return *this; + } + + template<typename T, typename std::enable_if<detail::conjunction< + std::is_integral<T>, detail::negation<std::is_same<T, boolean>>>::value, + std::nullptr_t>::type = nullptr> + basic_value(T i, std::vector<std::string> com) + : type_(value_t::integer), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->integer_, static_cast<integer>(i)); + } + + // floating ============================================================= + + template<typename T, typename std::enable_if< + std::is_floating_point<T>::value, std::nullptr_t>::type = nullptr> + basic_value(T f) + : type_(value_t::floating), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->floating_, static_cast<floating>(f)); + } + + + template<typename T, typename std::enable_if< + std::is_floating_point<T>::value, std::nullptr_t>::type = nullptr> + basic_value& operator=(T f) + { + this->cleanup(); + this->type_ = value_t::floating; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->floating_, static_cast<floating>(f)); + return *this; + } + + template<typename T, typename std::enable_if< + std::is_floating_point<T>::value, std::nullptr_t>::type = nullptr> + basic_value(T f, std::vector<std::string> com) + : type_(value_t::floating), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->floating_, f); + } + + // string =============================================================== + + basic_value(toml::string s) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, std::move(s)); + } + basic_value& operator=(toml::string s) + { + this->cleanup(); + this->type_ = value_t::string ; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->string_, s); + return *this; + } + basic_value(toml::string s, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, std::move(s)); + } + + basic_value(std::string s) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, toml::string(std::move(s))); + } + basic_value& operator=(std::string s) + { + this->cleanup(); + this->type_ = value_t::string ; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->string_, toml::string(std::move(s))); + return *this; + } + basic_value(std::string s, string_t kind) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, toml::string(std::move(s), kind)); + } + basic_value(std::string s, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, toml::string(std::move(s))); + } + basic_value(std::string s, string_t kind, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, toml::string(std::move(s), kind)); + } + + basic_value(const char* s) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, toml::string(std::string(s))); + } + basic_value& operator=(const char* s) + { + this->cleanup(); + this->type_ = value_t::string ; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->string_, toml::string(std::string(s))); + return *this; + } + basic_value(const char* s, string_t kind) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, toml::string(std::string(s), kind)); + } + basic_value(const char* s, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, toml::string(std::string(s))); + } + basic_value(const char* s, string_t kind, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, toml::string(std::string(s), kind)); + } + +#if defined(TOML11_USING_STRING_VIEW) && TOML11_USING_STRING_VIEW>0 + basic_value(std::string_view s) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, toml::string(s)); + } + basic_value& operator=(std::string_view s) + { + this->cleanup(); + this->type_ = value_t::string ; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->string_, toml::string(s)); + return *this; + } + basic_value(std::string_view s, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, toml::string(s)); + } + basic_value(std::string_view s, string_t kind) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->string_, toml::string(s, kind)); + } + basic_value(std::string_view s, string_t kind, std::vector<std::string> com) + : type_(value_t::string), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->string_, toml::string(s, kind)); + } +#endif + + // local date =========================================================== + + basic_value(const local_date& ld) + : type_(value_t::local_date), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->local_date_, ld); + } + basic_value& operator=(const local_date& ld) + { + this->cleanup(); + this->type_ = value_t::local_date; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->local_date_, ld); + return *this; + } + basic_value(const local_date& ld, std::vector<std::string> com) + : type_(value_t::local_date), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->local_date_, ld); + } + + // local time =========================================================== + + basic_value(const local_time& lt) + : type_(value_t::local_time), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->local_time_, lt); + } + basic_value(const local_time& lt, std::vector<std::string> com) + : type_(value_t::local_time), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->local_time_, lt); + } + basic_value& operator=(const local_time& lt) + { + this->cleanup(); + this->type_ = value_t::local_time; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->local_time_, lt); + return *this; + } + + template<typename Rep, typename Period> + basic_value(const std::chrono::duration<Rep, Period>& dur) + : type_(value_t::local_time), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->local_time_, local_time(dur)); + } + template<typename Rep, typename Period> + basic_value(const std::chrono::duration<Rep, Period>& dur, + std::vector<std::string> com) + : type_(value_t::local_time), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->local_time_, local_time(dur)); + } + template<typename Rep, typename Period> + basic_value& operator=(const std::chrono::duration<Rep, Period>& dur) + { + this->cleanup(); + this->type_ = value_t::local_time; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->local_time_, local_time(dur)); + return *this; + } + + // local datetime ======================================================= + + basic_value(const local_datetime& ldt) + : type_(value_t::local_datetime), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->local_datetime_, ldt); + } + basic_value(const local_datetime& ldt, std::vector<std::string> com) + : type_(value_t::local_datetime), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->local_datetime_, ldt); + } + basic_value& operator=(const local_datetime& ldt) + { + this->cleanup(); + this->type_ = value_t::local_datetime; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->local_datetime_, ldt); + return *this; + } + + // offset datetime ====================================================== + + basic_value(const offset_datetime& odt) + : type_(value_t::offset_datetime), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->offset_datetime_, odt); + } + basic_value(const offset_datetime& odt, std::vector<std::string> com) + : type_(value_t::offset_datetime), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->offset_datetime_, odt); + } + basic_value& operator=(const offset_datetime& odt) + { + this->cleanup(); + this->type_ = value_t::offset_datetime; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->offset_datetime_, odt); + return *this; + } + basic_value(const std::chrono::system_clock::time_point& tp) + : type_(value_t::offset_datetime), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->offset_datetime_, offset_datetime(tp)); + } + basic_value(const std::chrono::system_clock::time_point& tp, + std::vector<std::string> com) + : type_(value_t::offset_datetime), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->offset_datetime_, offset_datetime(tp)); + } + basic_value& operator=(const std::chrono::system_clock::time_point& tp) + { + this->cleanup(); + this->type_ = value_t::offset_datetime; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->offset_datetime_, offset_datetime(tp)); + return *this; + } + + // array ================================================================ + + basic_value(const array_type& ary) + : type_(value_t::array), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->array_, ary); + } + basic_value(const array_type& ary, std::vector<std::string> com) + : type_(value_t::array), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->array_, ary); + } + basic_value& operator=(const array_type& ary) + { + this->cleanup(); + this->type_ = value_t::array ; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->array_, ary); + return *this; + } + + // array (initializer_list) ---------------------------------------------- + + template<typename T, typename std::enable_if< + std::is_convertible<T, value_type>::value, + std::nullptr_t>::type = nullptr> + basic_value(std::initializer_list<T> list) + : type_(value_t::array), + region_info_(std::make_shared<region_base>(region_base{})) + { + array_type ary(list.begin(), list.end()); + assigner(this->array_, std::move(ary)); + } + template<typename T, typename std::enable_if< + std::is_convertible<T, value_type>::value, + std::nullptr_t>::type = nullptr> + basic_value(std::initializer_list<T> list, std::vector<std::string> com) + : type_(value_t::array), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + array_type ary(list.begin(), list.end()); + assigner(this->array_, std::move(ary)); + } + template<typename T, typename std::enable_if< + std::is_convertible<T, value_type>::value, + std::nullptr_t>::type = nullptr> + basic_value& operator=(std::initializer_list<T> list) + { + this->cleanup(); + this->type_ = value_t::array; + this->region_info_ = std::make_shared<region_base>(region_base{}); + + array_type ary(list.begin(), list.end()); + assigner(this->array_, std::move(ary)); + return *this; + } + + // array (STL Containers) ------------------------------------------------ + + template<typename T, typename std::enable_if<detail::conjunction< + detail::negation<std::is_same<T, array_type>>, + detail::is_container<T> + >::value, std::nullptr_t>::type = nullptr> + basic_value(const T& list) + : type_(value_t::array), + region_info_(std::make_shared<region_base>(region_base{})) + { + static_assert(std::is_convertible<typename T::value_type, value_type>::value, + "elements of a container should be convertible to toml::value"); + + array_type ary(list.size()); + std::copy(list.begin(), list.end(), ary.begin()); + assigner(this->array_, std::move(ary)); + } + template<typename T, typename std::enable_if<detail::conjunction< + detail::negation<std::is_same<T, array_type>>, + detail::is_container<T> + >::value, std::nullptr_t>::type = nullptr> + basic_value(const T& list, std::vector<std::string> com) + : type_(value_t::array), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + static_assert(std::is_convertible<typename T::value_type, value_type>::value, + "elements of a container should be convertible to toml::value"); + + array_type ary(list.size()); + std::copy(list.begin(), list.end(), ary.begin()); + assigner(this->array_, std::move(ary)); + } + template<typename T, typename std::enable_if<detail::conjunction< + detail::negation<std::is_same<T, array_type>>, + detail::is_container<T> + >::value, std::nullptr_t>::type = nullptr> + basic_value& operator=(const T& list) + { + static_assert(std::is_convertible<typename T::value_type, value_type>::value, + "elements of a container should be convertible to toml::value"); + + this->cleanup(); + this->type_ = value_t::array; + this->region_info_ = std::make_shared<region_base>(region_base{}); + + array_type ary(list.size()); + std::copy(list.begin(), list.end(), ary.begin()); + assigner(this->array_, std::move(ary)); + return *this; + } + + // table ================================================================ + + basic_value(const table_type& tab) + : type_(value_t::table), + region_info_(std::make_shared<region_base>(region_base{})) + { + assigner(this->table_, tab); + } + basic_value(const table_type& tab, std::vector<std::string> com) + : type_(value_t::table), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + assigner(this->table_, tab); + } + basic_value& operator=(const table_type& tab) + { + this->cleanup(); + this->type_ = value_t::table; + this->region_info_ = std::make_shared<region_base>(region_base{}); + assigner(this->table_, tab); + return *this; + } + + // initializer-list ------------------------------------------------------ + + basic_value(std::initializer_list<std::pair<key, basic_value>> list) + : type_(value_t::table), + region_info_(std::make_shared<region_base>(region_base{})) + { + table_type tab; + for(const auto& elem : list) {tab[elem.first] = elem.second;} + assigner(this->table_, std::move(tab)); + } + + basic_value(std::initializer_list<std::pair<key, basic_value>> list, + std::vector<std::string> com) + : type_(value_t::table), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + table_type tab; + for(const auto& elem : list) {tab[elem.first] = elem.second;} + assigner(this->table_, std::move(tab)); + } + basic_value& operator=(std::initializer_list<std::pair<key, basic_value>> list) + { + this->cleanup(); + this->type_ = value_t::table; + this->region_info_ = std::make_shared<region_base>(region_base{}); + + table_type tab; + for(const auto& elem : list) {tab[elem.first] = elem.second;} + assigner(this->table_, std::move(tab)); + return *this; + } + + // other table-like ----------------------------------------------------- + + template<typename Map, typename std::enable_if<detail::conjunction< + detail::negation<std::is_same<Map, table_type>>, + detail::is_map<Map> + >::value, std::nullptr_t>::type = nullptr> + basic_value(const Map& mp) + : type_(value_t::table), + region_info_(std::make_shared<region_base>(region_base{})) + { + table_type tab; + for(const auto& elem : mp) {tab[elem.first] = elem.second;} + assigner(this->table_, std::move(tab)); + } + template<typename Map, typename std::enable_if<detail::conjunction< + detail::negation<std::is_same<Map, table_type>>, + detail::is_map<Map> + >::value, std::nullptr_t>::type = nullptr> + basic_value(const Map& mp, std::vector<std::string> com) + : type_(value_t::table), + region_info_(std::make_shared<region_base>(region_base{})), + comments_(std::move(com)) + { + table_type tab; + for(const auto& elem : mp) {tab[elem.first] = elem.second;} + assigner(this->table_, std::move(tab)); + } + template<typename Map, typename std::enable_if<detail::conjunction< + detail::negation<std::is_same<Map, table_type>>, + detail::is_map<Map> + >::value, std::nullptr_t>::type = nullptr> + basic_value& operator=(const Map& mp) + { + this->cleanup(); + this->type_ = value_t::table; + this->region_info_ = std::make_shared<region_base>(region_base{}); + + table_type tab; + for(const auto& elem : mp) {tab[elem.first] = elem.second;} + assigner(this->table_, std::move(tab)); + return *this; + } + + // user-defined ========================================================= + + // convert using into_toml() method ------------------------------------- + + template<typename T, typename std::enable_if< + detail::has_into_toml_method<T>::value, std::nullptr_t>::type = nullptr> + basic_value(const T& ud): basic_value(ud.into_toml()) {} + + template<typename T, typename std::enable_if< + detail::has_into_toml_method<T>::value, std::nullptr_t>::type = nullptr> + basic_value(const T& ud, std::vector<std::string> com) + : basic_value(ud.into_toml(), std::move(com)) + {} + template<typename T, typename std::enable_if< + detail::has_into_toml_method<T>::value, std::nullptr_t>::type = nullptr> + basic_value& operator=(const T& ud) + { + *this = ud.into_toml(); + return *this; + } + + // convert using into<T> struct ----------------------------------------- + + template<typename T, std::size_t S = sizeof(::toml::into<T>)> + basic_value(const T& ud): basic_value(::toml::into<T>::into_toml(ud)) {} + template<typename T, std::size_t S = sizeof(::toml::into<T>)> + basic_value(const T& ud, std::vector<std::string> com) + : basic_value(::toml::into<T>::into_toml(ud), std::move(com)) + {} + template<typename T, std::size_t S = sizeof(::toml::into<T>)> + basic_value& operator=(const T& ud) + { + *this = ::toml::into<T>::into_toml(ud); + return *this; + } + + // for internal use ------------------------------------------------------ + // + // Those constructors take detail::region that contains parse result. + + basic_value(boolean b, detail::region reg, std::vector<std::string> cm) + : type_(value_t::boolean), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->boolean_, b); + } + template<typename T, typename std::enable_if< + detail::conjunction< + std::is_integral<T>, detail::negation<std::is_same<T, boolean>> + >::value, std::nullptr_t>::type = nullptr> + basic_value(T i, detail::region reg, std::vector<std::string> cm) + : type_(value_t::integer), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->integer_, static_cast<integer>(i)); + } + template<typename T, typename std::enable_if< + std::is_floating_point<T>::value, std::nullptr_t>::type = nullptr> + basic_value(T f, detail::region reg, std::vector<std::string> cm) + : type_(value_t::floating), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->floating_, static_cast<floating>(f)); + } + basic_value(toml::string s, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::string), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->string_, std::move(s)); + } + basic_value(const local_date& ld, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::local_date), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->local_date_, ld); + } + basic_value(const local_time& lt, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::local_time), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->local_time_, lt); + } + basic_value(const local_datetime& ldt, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::local_datetime), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->local_datetime_, ldt); + } + basic_value(const offset_datetime& odt, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::offset_datetime), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->offset_datetime_, odt); + } + basic_value(const array_type& ary, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::array), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->array_, ary); + } + basic_value(const table_type& tab, detail::region reg, + std::vector<std::string> cm) + : type_(value_t::table), + region_info_(std::make_shared<detail::region>(std::move(reg))), + comments_(std::move(cm)) + { + assigner(this->table_, tab); + } + + template<typename T, typename std::enable_if< + detail::is_exact_toml_type<T, value_type>::value, + std::nullptr_t>::type = nullptr> + basic_value(std::pair<T, detail::region> parse_result, std::vector<std::string> com) + : basic_value(std::move(parse_result.first), + std::move(parse_result.second), + std::move(com)) + {} + + // type checking and casting ============================================ + + template<typename T, typename std::enable_if< + detail::is_exact_toml_type<T, value_type>::value, + std::nullptr_t>::type = nullptr> + bool is() const noexcept + { + return detail::type_to_enum<T, value_type>::value == this->type_; + } + bool is(value_t t) const noexcept {return t == this->type_;} + + bool is_uninitialized() const noexcept {return this->is(value_t::empty );} + bool is_boolean() const noexcept {return this->is(value_t::boolean );} + bool is_integer() const noexcept {return this->is(value_t::integer );} + bool is_floating() const noexcept {return this->is(value_t::floating );} + bool is_string() const noexcept {return this->is(value_t::string );} + bool is_offset_datetime() const noexcept {return this->is(value_t::offset_datetime);} + bool is_local_datetime() const noexcept {return this->is(value_t::local_datetime );} + bool is_local_date() const noexcept {return this->is(value_t::local_date );} + bool is_local_time() const noexcept {return this->is(value_t::local_time );} + bool is_array() const noexcept {return this->is(value_t::array );} + bool is_table() const noexcept {return this->is(value_t::table );} + + value_t type() const noexcept {return type_;} + + template<value_t T> + typename detail::enum_to_type<T, value_type>::type& cast() & + { + if(this->type_ != T) + { + detail::throw_bad_cast<T>("toml::value::cast: ", this->type_, *this); + } + return detail::switch_cast<T>::invoke(*this); + } + template<value_t T> + typename detail::enum_to_type<T, value_type>::type const& cast() const& + { + if(this->type_ != T) + { + detail::throw_bad_cast<T>("toml::value::cast: ", this->type_, *this); + } + return detail::switch_cast<T>::invoke(*this); + } + template<value_t T> + typename detail::enum_to_type<T, value_type>::type&& cast() && + { + if(this->type_ != T) + { + detail::throw_bad_cast<T>("toml::value::cast: ", this->type_, *this); + } + return detail::switch_cast<T>::invoke(std::move(*this)); + } + + // ------------------------------------------------------------------------ + // nothrow version + + boolean const& as_boolean (const std::nothrow_t&) const& noexcept {return this->boolean_;} + integer const& as_integer (const std::nothrow_t&) const& noexcept {return this->integer_;} + floating const& as_floating (const std::nothrow_t&) const& noexcept {return this->floating_;} + string const& as_string (const std::nothrow_t&) const& noexcept {return this->string_;} + offset_datetime const& as_offset_datetime(const std::nothrow_t&) const& noexcept {return this->offset_datetime_;} + local_datetime const& as_local_datetime (const std::nothrow_t&) const& noexcept {return this->local_datetime_;} + local_date const& as_local_date (const std::nothrow_t&) const& noexcept {return this->local_date_;} + local_time const& as_local_time (const std::nothrow_t&) const& noexcept {return this->local_time_;} + array_type const& as_array (const std::nothrow_t&) const& noexcept {return this->array_.value();} + table_type const& as_table (const std::nothrow_t&) const& noexcept {return this->table_.value();} + + boolean & as_boolean (const std::nothrow_t&) & noexcept {return this->boolean_;} + integer & as_integer (const std::nothrow_t&) & noexcept {return this->integer_;} + floating & as_floating (const std::nothrow_t&) & noexcept {return this->floating_;} + string & as_string (const std::nothrow_t&) & noexcept {return this->string_;} + offset_datetime& as_offset_datetime(const std::nothrow_t&) & noexcept {return this->offset_datetime_;} + local_datetime & as_local_datetime (const std::nothrow_t&) & noexcept {return this->local_datetime_;} + local_date & as_local_date (const std::nothrow_t&) & noexcept {return this->local_date_;} + local_time & as_local_time (const std::nothrow_t&) & noexcept {return this->local_time_;} + array_type & as_array (const std::nothrow_t&) & noexcept {return this->array_.value();} + table_type & as_table (const std::nothrow_t&) & noexcept {return this->table_.value();} + + boolean && as_boolean (const std::nothrow_t&) && noexcept {return std::move(this->boolean_);} + integer && as_integer (const std::nothrow_t&) && noexcept {return std::move(this->integer_);} + floating && as_floating (const std::nothrow_t&) && noexcept {return std::move(this->floating_);} + string && as_string (const std::nothrow_t&) && noexcept {return std::move(this->string_);} + offset_datetime&& as_offset_datetime(const std::nothrow_t&) && noexcept {return std::move(this->offset_datetime_);} + local_datetime && as_local_datetime (const std::nothrow_t&) && noexcept {return std::move(this->local_datetime_);} + local_date && as_local_date (const std::nothrow_t&) && noexcept {return std::move(this->local_date_);} + local_time && as_local_time (const std::nothrow_t&) && noexcept {return std::move(this->local_time_);} + array_type && as_array (const std::nothrow_t&) && noexcept {return std::move(this->array_.value());} + table_type && as_table (const std::nothrow_t&) && noexcept {return std::move(this->table_.value());} + + // ======================================================================== + // throw version + // ------------------------------------------------------------------------ + // const reference {{{ + + boolean const& as_boolean() const& + { + if(this->type_ != value_t::boolean) + { + detail::throw_bad_cast<value_t::boolean>( + "toml::value::as_boolean(): ", this->type_, *this); + } + return this->boolean_; + } + integer const& as_integer() const& + { + if(this->type_ != value_t::integer) + { + detail::throw_bad_cast<value_t::integer>( + "toml::value::as_integer(): ", this->type_, *this); + } + return this->integer_; + } + floating const& as_floating() const& + { + if(this->type_ != value_t::floating) + { + detail::throw_bad_cast<value_t::floating>( + "toml::value::as_floating(): ", this->type_, *this); + } + return this->floating_; + } + string const& as_string() const& + { + if(this->type_ != value_t::string) + { + detail::throw_bad_cast<value_t::string>( + "toml::value::as_string(): ", this->type_, *this); + } + return this->string_; + } + offset_datetime const& as_offset_datetime() const& + { + if(this->type_ != value_t::offset_datetime) + { + detail::throw_bad_cast<value_t::offset_datetime>( + "toml::value::as_offset_datetime(): ", this->type_, *this); + } + return this->offset_datetime_; + } + local_datetime const& as_local_datetime() const& + { + if(this->type_ != value_t::local_datetime) + { + detail::throw_bad_cast<value_t::local_datetime>( + "toml::value::as_local_datetime(): ", this->type_, *this); + } + return this->local_datetime_; + } + local_date const& as_local_date() const& + { + if(this->type_ != value_t::local_date) + { + detail::throw_bad_cast<value_t::local_date>( + "toml::value::as_local_date(): ", this->type_, *this); + } + return this->local_date_; + } + local_time const& as_local_time() const& + { + if(this->type_ != value_t::local_time) + { + detail::throw_bad_cast<value_t::local_time>( + "toml::value::as_local_time(): ", this->type_, *this); + } + return this->local_time_; + } + array_type const& as_array() const& + { + if(this->type_ != value_t::array) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::as_array(): ", this->type_, *this); + } + return this->array_.value(); + } + table_type const& as_table() const& + { + if(this->type_ != value_t::table) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::as_table(): ", this->type_, *this); + } + return this->table_.value(); + } + // }}} + // ------------------------------------------------------------------------ + // nonconst reference {{{ + + boolean & as_boolean() & + { + if(this->type_ != value_t::boolean) + { + detail::throw_bad_cast<value_t::boolean>( + "toml::value::as_boolean(): ", this->type_, *this); + } + return this->boolean_; + } + integer & as_integer() & + { + if(this->type_ != value_t::integer) + { + detail::throw_bad_cast<value_t::integer>( + "toml::value::as_integer(): ", this->type_, *this); + } + return this->integer_; + } + floating & as_floating() & + { + if(this->type_ != value_t::floating) + { + detail::throw_bad_cast<value_t::floating>( + "toml::value::as_floating(): ", this->type_, *this); + } + return this->floating_; + } + string & as_string() & + { + if(this->type_ != value_t::string) + { + detail::throw_bad_cast<value_t::string>( + "toml::value::as_string(): ", this->type_, *this); + } + return this->string_; + } + offset_datetime & as_offset_datetime() & + { + if(this->type_ != value_t::offset_datetime) + { + detail::throw_bad_cast<value_t::offset_datetime>( + "toml::value::as_offset_datetime(): ", this->type_, *this); + } + return this->offset_datetime_; + } + local_datetime & as_local_datetime() & + { + if(this->type_ != value_t::local_datetime) + { + detail::throw_bad_cast<value_t::local_datetime>( + "toml::value::as_local_datetime(): ", this->type_, *this); + } + return this->local_datetime_; + } + local_date & as_local_date() & + { + if(this->type_ != value_t::local_date) + { + detail::throw_bad_cast<value_t::local_date>( + "toml::value::as_local_date(): ", this->type_, *this); + } + return this->local_date_; + } + local_time & as_local_time() & + { + if(this->type_ != value_t::local_time) + { + detail::throw_bad_cast<value_t::local_time>( + "toml::value::as_local_time(): ", this->type_, *this); + } + return this->local_time_; + } + array_type & as_array() & + { + if(this->type_ != value_t::array) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::as_array(): ", this->type_, *this); + } + return this->array_.value(); + } + table_type & as_table() & + { + if(this->type_ != value_t::table) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::as_table(): ", this->type_, *this); + } + return this->table_.value(); + } + + // }}} + // ------------------------------------------------------------------------ + // rvalue reference {{{ + + boolean && as_boolean() && + { + if(this->type_ != value_t::boolean) + { + detail::throw_bad_cast<value_t::boolean>( + "toml::value::as_boolean(): ", this->type_, *this); + } + return std::move(this->boolean_); + } + integer && as_integer() && + { + if(this->type_ != value_t::integer) + { + detail::throw_bad_cast<value_t::integer>( + "toml::value::as_integer(): ", this->type_, *this); + } + return std::move(this->integer_); + } + floating && as_floating() && + { + if(this->type_ != value_t::floating) + { + detail::throw_bad_cast<value_t::floating>( + "toml::value::as_floating(): ", this->type_, *this); + } + return std::move(this->floating_); + } + string && as_string() && + { + if(this->type_ != value_t::string) + { + detail::throw_bad_cast<value_t::string>( + "toml::value::as_string(): ", this->type_, *this); + } + return std::move(this->string_); + } + offset_datetime && as_offset_datetime() && + { + if(this->type_ != value_t::offset_datetime) + { + detail::throw_bad_cast<value_t::offset_datetime>( + "toml::value::as_offset_datetime(): ", this->type_, *this); + } + return std::move(this->offset_datetime_); + } + local_datetime && as_local_datetime() && + { + if(this->type_ != value_t::local_datetime) + { + detail::throw_bad_cast<value_t::local_datetime>( + "toml::value::as_local_datetime(): ", this->type_, *this); + } + return std::move(this->local_datetime_); + } + local_date && as_local_date() && + { + if(this->type_ != value_t::local_date) + { + detail::throw_bad_cast<value_t::local_date>( + "toml::value::as_local_date(): ", this->type_, *this); + } + return std::move(this->local_date_); + } + local_time && as_local_time() && + { + if(this->type_ != value_t::local_time) + { + detail::throw_bad_cast<value_t::local_time>( + "toml::value::as_local_time(): ", this->type_, *this); + } + return std::move(this->local_time_); + } + array_type && as_array() && + { + if(this->type_ != value_t::array) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::as_array(): ", this->type_, *this); + } + return std::move(this->array_.value()); + } + table_type && as_table() && + { + if(this->type_ != value_t::table) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::as_table(): ", this->type_, *this); + } + return std::move(this->table_.value()); + } + // }}} + + // accessors ============================================================= + // + // may throw type_error or out_of_range + // + value_type& at(const key& k) + { + if(!this->is_table()) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::at(key): ", this->type_, *this); + } + if(this->as_table(std::nothrow).count(k) == 0) + { + detail::throw_key_not_found_error(*this, k); + } + return this->as_table(std::nothrow).at(k); + } + value_type const& at(const key& k) const + { + if(!this->is_table()) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::at(key): ", this->type_, *this); + } + if(this->as_table(std::nothrow).count(k) == 0) + { + detail::throw_key_not_found_error(*this, k); + } + return this->as_table(std::nothrow).at(k); + } + value_type& operator[](const key& k) + { + if(this->is_uninitialized()) + { + *this = table_type{}; + } + else if(!this->is_table()) // initialized, but not a table + { + detail::throw_bad_cast<value_t::table>( + "toml::value::operator[](key): ", this->type_, *this); + } + return this->as_table(std::nothrow)[k]; + } + + value_type& at(const std::size_t idx) + { + if(!this->is_array()) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::at(idx): ", this->type_, *this); + } + if(this->as_array(std::nothrow).size() <= idx) + { + throw std::out_of_range(detail::format_underline( + "toml::value::at(idx): no element corresponding to the index", { + {this->location(), concat_to_string("the length is ", + this->as_array(std::nothrow).size(), + ", and the specified index is ", idx)} + })); + } + return this->as_array().at(idx); + } + value_type const& at(const std::size_t idx) const + { + if(!this->is_array()) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::at(idx): ", this->type_, *this); + } + if(this->as_array(std::nothrow).size() <= idx) + { + throw std::out_of_range(detail::format_underline( + "toml::value::at(idx): no element corresponding to the index", { + {this->location(), concat_to_string("the length is ", + this->as_array(std::nothrow).size(), + ", and the specified index is ", idx)} + })); + } + return this->as_array(std::nothrow).at(idx); + } + + value_type& operator[](const std::size_t idx) noexcept + { + // no check... + return this->as_array(std::nothrow)[idx]; + } + value_type const& operator[](const std::size_t idx) const noexcept + { + // no check... + return this->as_array(std::nothrow)[idx]; + } + + void push_back(const value_type& x) + { + if(!this->is_array()) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::push_back(value): ", this->type_, *this); + } + this->as_array(std::nothrow).push_back(x); + return; + } + void push_back(value_type&& x) + { + if(!this->is_array()) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::push_back(value): ", this->type_, *this); + } + this->as_array(std::nothrow).push_back(std::move(x)); + return; + } + + template<typename ... Ts> + value_type& emplace_back(Ts&& ... args) + { + if(!this->is_array()) + { + detail::throw_bad_cast<value_t::array>( + "toml::value::emplace_back(...): ", this->type_, *this); + } + this->as_array(std::nothrow).emplace_back(std::forward<Ts>(args) ...); + return this->as_array(std::nothrow).back(); + } + + std::size_t size() const + { + switch(this->type_) + { + case value_t::array: + { + return this->as_array(std::nothrow).size(); + } + case value_t::table: + { + return this->as_table(std::nothrow).size(); + } + case value_t::string: + { + return this->as_string(std::nothrow).str.size(); + } + default: + { + throw type_error(detail::format_underline( + "toml::value::size(): bad_cast to container types", { + {this->location(), + concat_to_string("the actual type is ", this->type_)} + }), this->location()); + } + } + } + + std::size_t count(const key_type& k) const + { + if(!this->is_table()) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::count(key): ", this->type_, *this); + } + return this->as_table(std::nothrow).count(k); + } + + bool contains(const key_type& k) const + { + if(!this->is_table()) + { + detail::throw_bad_cast<value_t::table>( + "toml::value::contains(key): ", this->type_, *this); + } + return (this->as_table(std::nothrow).count(k) != 0); + } + + source_location location() const + { + return source_location(this->region_info_.get()); + } + + comment_type const& comments() const noexcept {return this->comments_;} + comment_type& comments() noexcept {return this->comments_;} + + private: + + void cleanup() noexcept + { + switch(this->type_) + { + case value_t::string : {string_.~string(); return;} + case value_t::array : {array_.~array_storage(); return;} + case value_t::table : {table_.~table_storage(); return;} + default : return; + } + } + + // for error messages + template<typename Value> + friend region_base const* detail::get_region(const Value& v); + + template<typename Value> + friend void detail::change_region(Value& v, detail::region reg); + + private: + + using array_storage = detail::storage<array_type>; + using table_storage = detail::storage<table_type>; + + value_t type_; + union + { + boolean boolean_; + integer integer_; + floating floating_; + string string_; + offset_datetime offset_datetime_; + local_datetime local_datetime_; + local_date local_date_; + local_time local_time_; + array_storage array_; + table_storage table_; + }; + std::shared_ptr<region_base> region_info_; + comment_type comments_; +}; + +// default toml::value and default array/table. +// TOML11_DEFAULT_COMMENT_STRATEGY is defined in comments.hpp +using value = basic_value<TOML11_DEFAULT_COMMENT_STRATEGY, std::unordered_map, std::vector>; +using array = typename value::array_type; +using table = typename value::table_type; + +template<typename C, template<typename ...> class T, template<typename ...> class A> +inline bool +operator==(const basic_value<C, T, A>& lhs, const basic_value<C, T, A>& rhs) +{ + if(lhs.type() != rhs.type()) {return false;} + if(lhs.comments() != rhs.comments()) {return false;} + + switch(lhs.type()) + { + case value_t::boolean : + { + return lhs.as_boolean() == rhs.as_boolean(); + } + case value_t::integer : + { + return lhs.as_integer() == rhs.as_integer(); + } + case value_t::floating : + { + return lhs.as_floating() == rhs.as_floating(); + } + case value_t::string : + { + return lhs.as_string() == rhs.as_string(); + } + case value_t::offset_datetime: + { + return lhs.as_offset_datetime() == rhs.as_offset_datetime(); + } + case value_t::local_datetime: + { + return lhs.as_local_datetime() == rhs.as_local_datetime(); + } + case value_t::local_date: + { + return lhs.as_local_date() == rhs.as_local_date(); + } + case value_t::local_time: + { + return lhs.as_local_time() == rhs.as_local_time(); + } + case value_t::array : + { + return lhs.as_array() == rhs.as_array(); + } + case value_t::table : + { + return lhs.as_table() == rhs.as_table(); + } + case value_t::empty : {return true; } + default: {return false;} + } +} + +template<typename C, template<typename ...> class T, template<typename ...> class A> +inline bool operator!=(const basic_value<C, T, A>& lhs, const basic_value<C, T, A>& rhs) +{ + return !(lhs == rhs); +} + +template<typename C, template<typename ...> class T, template<typename ...> class A> +typename std::enable_if<detail::conjunction< + detail::is_comparable<typename basic_value<C, T, A>::array_type>, + detail::is_comparable<typename basic_value<C, T, A>::table_type> + >::value, bool>::type +operator<(const basic_value<C, T, A>& lhs, const basic_value<C, T, A>& rhs) +{ + if(lhs.type() != rhs.type()){return (lhs.type() < rhs.type());} + switch(lhs.type()) + { + case value_t::boolean : + { + return lhs.as_boolean() < rhs.as_boolean() || + (lhs.as_boolean() == rhs.as_boolean() && + lhs.comments() < rhs.comments()); + } + case value_t::integer : + { + return lhs.as_integer() < rhs.as_integer() || + (lhs.as_integer() == rhs.as_integer() && + lhs.comments() < rhs.comments()); + } + case value_t::floating : + { + return lhs.as_floating() < rhs.as_floating() || + (lhs.as_floating() == rhs.as_floating() && + lhs.comments() < rhs.comments()); + } + case value_t::string : + { + return lhs.as_string() < rhs.as_string() || + (lhs.as_string() == rhs.as_string() && + lhs.comments() < rhs.comments()); + } + case value_t::offset_datetime: + { + return lhs.as_offset_datetime() < rhs.as_offset_datetime() || + (lhs.as_offset_datetime() == rhs.as_offset_datetime() && + lhs.comments() < rhs.comments()); + } + case value_t::local_datetime: + { + return lhs.as_local_datetime() < rhs.as_local_datetime() || + (lhs.as_local_datetime() == rhs.as_local_datetime() && + lhs.comments() < rhs.comments()); + } + case value_t::local_date: + { + return lhs.as_local_date() < rhs.as_local_date() || + (lhs.as_local_date() == rhs.as_local_date() && + lhs.comments() < rhs.comments()); + } + case value_t::local_time: + { + return lhs.as_local_time() < rhs.as_local_time() || + (lhs.as_local_time() == rhs.as_local_time() && + lhs.comments() < rhs.comments()); + } + case value_t::array : + { + return lhs.as_array() < rhs.as_array() || + (lhs.as_array() == rhs.as_array() && + lhs.comments() < rhs.comments()); + } + case value_t::table : + { + return lhs.as_table() < rhs.as_table() || + (lhs.as_table() == rhs.as_table() && + lhs.comments() < rhs.comments()); + } + case value_t::empty : + { + return lhs.comments() < rhs.comments(); + } + default: + { + return lhs.comments() < rhs.comments(); + } + } +} + +template<typename C, template<typename ...> class T, template<typename ...> class A> +typename std::enable_if<detail::conjunction< + detail::is_comparable<typename basic_value<C, T, A>::array_type>, + detail::is_comparable<typename basic_value<C, T, A>::table_type> + >::value, bool>::type +operator<=(const basic_value<C, T, A>& lhs, const basic_value<C, T, A>& rhs) +{ + return (lhs < rhs) || (lhs == rhs); +} +template<typename C, template<typename ...> class T, template<typename ...> class A> +typename std::enable_if<detail::conjunction< + detail::is_comparable<typename basic_value<C, T, A>::array_type>, + detail::is_comparable<typename basic_value<C, T, A>::table_type> + >::value, bool>::type +operator>(const basic_value<C, T, A>& lhs, const basic_value<C, T, A>& rhs) +{ + return !(lhs <= rhs); +} +template<typename C, template<typename ...> class T, template<typename ...> class A> +typename std::enable_if<detail::conjunction< + detail::is_comparable<typename basic_value<C, T, A>::array_type>, + detail::is_comparable<typename basic_value<C, T, A>::table_type> + >::value, bool>::type +operator>=(const basic_value<C, T, A>& lhs, const basic_value<C, T, A>& rhs) +{ + return !(lhs < rhs); +} + +template<typename C, template<typename ...> class T, template<typename ...> class A> +inline std::string format_error(const std::string& err_msg, + const basic_value<C, T, A>& v, const std::string& comment, + std::vector<std::string> hints = {}, + const bool colorize = TOML11_ERROR_MESSAGE_COLORIZED) +{ + return detail::format_underline(err_msg, {{v.location(), comment}}, + std::move(hints), colorize); +} + +template<typename C, template<typename ...> class T, template<typename ...> class A> +inline std::string format_error(const std::string& err_msg, + const toml::basic_value<C, T, A>& v1, const std::string& comment1, + const toml::basic_value<C, T, A>& v2, const std::string& comment2, + std::vector<std::string> hints = {}, + const bool colorize = TOML11_ERROR_MESSAGE_COLORIZED) +{ + return detail::format_underline(err_msg, { + {v1.location(), comment1}, {v2.location(), comment2} + }, std::move(hints), colorize); +} + +template<typename C, template<typename ...> class T, template<typename ...> class A> +inline std::string format_error(const std::string& err_msg, + const toml::basic_value<C, T, A>& v1, const std::string& comment1, + const toml::basic_value<C, T, A>& v2, const std::string& comment2, + const toml::basic_value<C, T, A>& v3, const std::string& comment3, + std::vector<std::string> hints = {}, + const bool colorize = TOML11_ERROR_MESSAGE_COLORIZED) +{ + return detail::format_underline(err_msg, {{v1.location(), comment1}, + {v2.location(), comment2}, {v3.location(), comment3} + }, std::move(hints), colorize); +} + +template<typename Visitor, typename C, + template<typename ...> class T, template<typename ...> class A> +detail::return_type_of_t<Visitor, const toml::boolean&> +visit(Visitor&& visitor, const toml::basic_value<C, T, A>& v) +{ + switch(v.type()) + { + case value_t::boolean : {return visitor(v.as_boolean ());} + case value_t::integer : {return visitor(v.as_integer ());} + case value_t::floating : {return visitor(v.as_floating ());} + case value_t::string : {return visitor(v.as_string ());} + case value_t::offset_datetime: {return visitor(v.as_offset_datetime());} + case value_t::local_datetime : {return visitor(v.as_local_datetime ());} + case value_t::local_date : {return visitor(v.as_local_date ());} + case value_t::local_time : {return visitor(v.as_local_time ());} + case value_t::array : {return visitor(v.as_array ());} + case value_t::table : {return visitor(v.as_table ());} + case value_t::empty : break; + default: break; + } + throw std::runtime_error(format_error("[error] toml::visit: toml::basic_value " + "does not have any valid basic_value.", v, "here")); +} + +template<typename Visitor, typename C, + template<typename ...> class T, template<typename ...> class A> +detail::return_type_of_t<Visitor, toml::boolean&> +visit(Visitor&& visitor, toml::basic_value<C, T, A>& v) +{ + switch(v.type()) + { + case value_t::boolean : {return visitor(v.as_boolean ());} + case value_t::integer : {return visitor(v.as_integer ());} + case value_t::floating : {return visitor(v.as_floating ());} + case value_t::string : {return visitor(v.as_string ());} + case value_t::offset_datetime: {return visitor(v.as_offset_datetime());} + case value_t::local_datetime : {return visitor(v.as_local_datetime ());} + case value_t::local_date : {return visitor(v.as_local_date ());} + case value_t::local_time : {return visitor(v.as_local_time ());} + case value_t::array : {return visitor(v.as_array ());} + case value_t::table : {return visitor(v.as_table ());} + case value_t::empty : break; + default: break; + } + throw std::runtime_error(format_error("[error] toml::visit: toml::basic_value " + "does not have any valid basic_value.", v, "here")); +} + +template<typename Visitor, typename C, + template<typename ...> class T, template<typename ...> class A> +detail::return_type_of_t<Visitor, toml::boolean&&> +visit(Visitor&& visitor, toml::basic_value<C, T, A>&& v) +{ + switch(v.type()) + { + case value_t::boolean : {return visitor(std::move(v.as_boolean ()));} + case value_t::integer : {return visitor(std::move(v.as_integer ()));} + case value_t::floating : {return visitor(std::move(v.as_floating ()));} + case value_t::string : {return visitor(std::move(v.as_string ()));} + case value_t::offset_datetime: {return visitor(std::move(v.as_offset_datetime()));} + case value_t::local_datetime : {return visitor(std::move(v.as_local_datetime ()));} + case value_t::local_date : {return visitor(std::move(v.as_local_date ()));} + case value_t::local_time : {return visitor(std::move(v.as_local_time ()));} + case value_t::array : {return visitor(std::move(v.as_array ()));} + case value_t::table : {return visitor(std::move(v.as_table ()));} + case value_t::empty : break; + default: break; + } + throw std::runtime_error(format_error("[error] toml::visit: toml::basic_value " + "does not have any valid basic_value.", v, "here")); +} + +}// toml +#endif// TOML11_VALUE |