50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
#ifndef TOOLKIT_H
|
|
#define TOOLKIT_H
|
|
|
|
#include <charconv>
|
|
#include <expected>
|
|
#include <type_traits>
|
|
#include <string_view>
|
|
#include <string>
|
|
#include <ios>
|
|
|
|
//use for to_chars
|
|
constexpr size_t buffer_size = 32;
|
|
|
|
template <typename T>
|
|
concept _num_type = requires {
|
|
std::is_same_v<T, int> ||
|
|
std::is_same_v<T, float> ||
|
|
std::is_same_v<T, long> ||
|
|
std::is_same_v<T, double>;
|
|
};
|
|
|
|
namespace toolkit{
|
|
template<typename T>
|
|
std::expected<std::string, std::string> to_string(T value){
|
|
if constexpr (std::is_same_v<T, int> || std::is_same_v<T, float> || std::is_same_v<T, double>){
|
|
char buffer[buffer_size];
|
|
auto res = std::to_chars(buffer, buffer + buffer_size, value);
|
|
if (res.ec != std::errc()) {
|
|
return std::unexpected(std::make_error_code(res.ec).message());
|
|
}
|
|
return std::string(buffer, res.ptr - buffer);
|
|
} else if constexpr (std::is_same_v<typename std::remove_const<T>::type,
|
|
char *>) {
|
|
return std::to_string(value);
|
|
}
|
|
}
|
|
|
|
template<typename T = double>// requires std::is_same_v<T, std::string>
|
|
std::expected<T, std::string> stoi(const std::string& str){
|
|
T value;
|
|
auto res = std::from_chars(str.c_str(), str.c_str() + str.size(), value);
|
|
if(res.ec != std::errc()){
|
|
return std::unexpected(std::make_error_code(res.ec).message());
|
|
}
|
|
return value;
|
|
}
|
|
}
|
|
|
|
#endif
|