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add unit tests for conversion without the fast float library

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ado
2022-03-30 19:54:50 +02:00
parent d328f7d59d
commit c214975ca0
5 changed files with 175 additions and 47 deletions
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23
include/ss/extract.hpp
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@@ -2,7 +2,6 @@
#include "type_traits.hpp"
#include <cstring>
#include <fast_float/fast_float.h>
#include <functional>
#include <limits>
#include <optional>
@@ -11,13 +10,18 @@
#include <string_view>
#include <variant>
#ifndef SSP_DISABLE_FAST_FLOAT
#include <fast_float/fast_float.h>
#else
#include <charconv>
#endif
namespace ss {
////////////////
// number converters
////////////////
#define SSP_DISABLE_FAST_FLOAT
#ifndef SSP_DISABLE_FAST_FLOAT
template <typename T>
@@ -38,20 +42,11 @@ template <typename T>
std::enable_if_t<std::is_floating_point_v<T>, std::optional<T>> to_num(
const char* const begin, const char* const end) {
T ret;
try {
if constexpr (std::is_same_v<T, float>) {
ret = std::stof(std::string{begin, end});
}
if constexpr (std::is_same_v<T, double>) {
ret = std::stod(std::string{begin, end});
}
if constexpr (std::is_same_v<T, long double>) {
ret = std::stold(std::string{begin, end});
}
} catch (...) {
auto [ptr, ec] = std::from_chars(begin, end, ret);
if (ec != std::errc() || ptr != end) {
return std::nullopt;
}
return ret;
}