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#pragma once
#include <optional>
#include <string_view>
#include "util.hh"
namespace nix {
// If `separator` is found, we return the portion of the string before the
// separator, and modify the string argument to contain only the part after the
// separator. Otherwise, we return `std::nullopt`, and we leave the argument
// string alone.
static inline std::optional<std::string_view> splitPrefixTo(std::string_view & string, char separator) {
auto sepInstance = string.find(separator);
if (sepInstance != std::string_view::npos) {
auto prefix = string.substr(0, sepInstance);
string.remove_prefix(sepInstance+1);
return prefix;
}
return std::nullopt;
}
static inline bool splitPrefix(std::string_view & string, std::string_view prefix) {
bool res = hasPrefix(string, prefix);
if (res)
string.remove_prefix(prefix.length());
return res;
}
}
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