| Pirama Arumuga Nainar | d285ad0 | 2022-02-08 09:26:56 -0800 | [diff] [blame] | 1 | // -*- C++ -*- |
| 2 | //===----------------------------------------------------------------------===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef _LIBCPP___BIT_BIT_CAST_H |
| 11 | #define _LIBCPP___BIT_BIT_CAST_H |
| 12 | |
| 13 | #include <__config> |
| 14 | #include <type_traits> |
| 15 | |
| 16 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 17 | #pragma GCC system_header |
| 18 | #endif |
| 19 | |
| 20 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 21 | |
| 22 | #if _LIBCPP_STD_VER > 17 |
| 23 | |
| 24 | template<class _ToType, class _FromType, class = enable_if_t< |
| 25 | sizeof(_ToType) == sizeof(_FromType) && |
| 26 | is_trivially_copyable_v<_ToType> && |
| 27 | is_trivially_copyable_v<_FromType> |
| 28 | >> |
| 29 | _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI |
| 30 | constexpr _ToType bit_cast(_FromType const& __from) noexcept { |
| 31 | return __builtin_bit_cast(_ToType, __from); |
| 32 | } |
| 33 | |
| 34 | #endif // _LIBCPP_STD_VER > 17 |
| 35 | |
| 36 | _LIBCPP_END_NAMESPACE_STD |
| 37 | |
| 38 | #endif // _LIBCPP___BIT_BIT_CAST_H |