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FASTFLOAT_HAS_BIT_CAST fix for old standards.

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IRainman 2025-12-30 00:11:16 +03:00
parent 051d15119e
commit cd61547b63
1 changed files with 5 additions and 2 deletions
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7
include/fast_float/float_common.h
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@ -251,11 +251,14 @@ using parse_options = parse_options_t<char>;
#endif #endif
namespace fast_float { namespace fast_float {
#if FASTFLOAT_HAS_BIT_CAST
template <typename To, typename From> template <typename To, typename From>
fastfloat_really_inline constexpr To bit_cast(const From &from) noexcept { fastfloat_really_inline constexpr To bit_cast(const From &from) noexcept {
#if FASTFLOAT_HAS_BIT_CAST
return std::bit_cast<To>(from); return std::bit_cast<To>(from);
}
#else #else
template <typename To, typename From>
fastfloat_really_inline To bit_cast(const From &from) noexcept {
// Implementation of std::bit_cast for pre-C++20. // Implementation of std::bit_cast for pre-C++20.
static_assert(sizeof(To) == sizeof(From), static_assert(sizeof(To) == sizeof(From),
"bit_cast requires source and destination to be the same size"); "bit_cast requires source and destination to be the same size");
@ -263,8 +266,8 @@ fastfloat_really_inline constexpr To bit_cast(const From &from) noexcept {
// The cast suppresses a bogus -Wclass-memaccess on GCC. // The cast suppresses a bogus -Wclass-memaccess on GCC.
std::memcpy(static_cast<void *>(&to), &from, sizeof(to)); std::memcpy(static_cast<void *>(&to), &from, sizeof(to));
return to; return to;
#endif
} }
#endif
fastfloat_really_inline constexpr bool cpp20_and_in_constexpr() noexcept { fastfloat_really_inline constexpr bool cpp20_and_in_constexpr() noexcept {
#if FASTFLOAT_HAS_IS_CONSTANT_EVALUATED #if FASTFLOAT_HAS_IS_CONSTANT_EVALUATED