1*4bdff4beSrobert // -*- C++ -*- 2*4bdff4beSrobert //===----------------------------------------------------------------------===// 3*4bdff4beSrobert // 4*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 6*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7*4bdff4beSrobert // 8*4bdff4beSrobert //===----------------------------------------------------------------------===// 9*4bdff4beSrobert 10*4bdff4beSrobert #ifndef _LIBCPP___BIT_BIT_CAST_H 11*4bdff4beSrobert #define _LIBCPP___BIT_BIT_CAST_H 12*4bdff4beSrobert 13*4bdff4beSrobert #include <__config> 14*4bdff4beSrobert #include <__type_traits/is_trivially_copyable.h> 15*4bdff4beSrobert 16*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17*4bdff4beSrobert # pragma GCC system_header 18*4bdff4beSrobert #endif 19*4bdff4beSrobert 20*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 21*4bdff4beSrobert 22*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 23*4bdff4beSrobert 24*4bdff4beSrobert template <class _ToType, class _FromType> 25*4bdff4beSrobert requires(sizeof(_ToType) == sizeof(_FromType) && 26*4bdff4beSrobert is_trivially_copyable_v<_ToType> && 27*4bdff4beSrobert is_trivially_copyable_v<_FromType>) bit_cast(const _FromType & __from)28*4bdff4beSrobert_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr _ToType bit_cast(const _FromType& __from) noexcept { 29*4bdff4beSrobert return __builtin_bit_cast(_ToType, __from); 30*4bdff4beSrobert } 31*4bdff4beSrobert 32*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 33*4bdff4beSrobert 34*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 35*4bdff4beSrobert 36*4bdff4beSrobert #endif // _LIBCPP___BIT_BIT_CAST_H 37