Nikilite/suyu
1
1
Fork 0
forked from suyu/suyu
Code Pull requests Activity

Merge pull request #9920 from liamwhite/constexpr-bit-cast

Browse source 
common: make BitCast constexpr
This commit is contained in:
Morph 2023-03-07 22:42:19 -05:00 committed by GitHub
commit b014fdacdb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
src/common/bit_cast.h
View file

@ -3,19 +3,21 @@
#pragma once #pragma once
#include <cstring> #include <version>
#include <type_traits>
#ifdef __cpp_lib_bit_cast
#include <bit>
#endif
namespace Common { namespace Common {
template <typename To, typename From> template <typename To, typename From>
[[nodiscard]] std::enable_if_t<sizeof(To) == sizeof(From) && std::is_trivially_copyable_v<From> && constexpr inline To BitCast(const From& from) {
std::is_trivially_copyable_v<To>, #ifdef __cpp_lib_bit_cast
To> return std::bit_cast<To>(from);
BitCast(const From& src) noexcept { #else
To dst; return __builtin_bit_cast(To, from);
std::memcpy(&dst, &src, sizeof(To)); #endif
return dst;
} }
} // namespace Common } // namespace Common