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use from chars when it can

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This commit is contained in:
altalk23 2024-02-18 17:19:25 +03:00
parent e7997d6c84
commit 30c9a8ec82
1 changed files with 15 additions and 9 deletions
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24
loader/include/Geode/utils/general.hpp
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@ -105,8 +105,12 @@ namespace geode {
*/
template <class Num>
Result<Num> numFromString(std::string_view const str, int base = 10) {
if constexpr (std::is_floating_point_v<Num>) {
Num val = {};
if constexpr (std::is_floating_point_v<Num>
#if defined(__cpp_lib_to_chars)
&& false
#endif
) {
Num val;
char* strEnd;
errno = 0;
if (std::setlocale(LC_NUMERIC, "en_US.utf8")) {
@ -121,13 +125,15 @@ namespace geode {
}
else {
Num result;
auto [_, ec] = std::from_chars(str.data(), str.data() + str.size(), result, base);
switch (ec) {
case std::errc(): return Ok(result);
case std::errc::invalid_argument: return Err("String is not a number");
case std::errc::result_out_of_range: return Err("Number is too large to fit");
default: return Err("Unknown error");
}
std::from_chars_result res;
if constexpr (std::is_floating_point_v<Num>) res = std::from_chars(str.data(), str.data() + str.size(), result);
else res = std::from_chars(str.data(), str.data() + str.size(), result, base);
auto [_, ec] = res;
if (ec == std::errc()) return Ok(result);
else if (ec == std::errc::invalid_argument) return Err("String is not a number");
else if (ec == std::errc::result_out_of_range) return Err("Number is too large to fit");
else return Err("Unknown error");
}
}