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diff --git a/src/toml11/toml/result.hpp b/src/toml11/toml/result.hpp
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@@ -1,717 +0,0 @@
-// 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
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