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1 // -*- C++ -*-
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2 //===----------------------------------------------------------------------===//
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3 //
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4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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5 // See https://llvm.org/LICENSE.txt for license information.
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6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #ifndef _LIBCPP___BIT_BIT_CAST_H
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11 #define _LIBCPP___BIT_BIT_CAST_H
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12
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13 #include <__config>
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252
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14 #include <__type_traits/is_trivially_copyable.h>
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236
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15
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16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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17 # pragma GCC system_header
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18 #endif
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19
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20 _LIBCPP_BEGIN_NAMESPACE_STD
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21
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252
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22 #if _LIBCPP_STD_VER >= 20
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236
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23
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24 template <class _ToType, class _FromType>
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25 requires(sizeof(_ToType) == sizeof(_FromType) &&
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26 is_trivially_copyable_v<_ToType> &&
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27 is_trivially_copyable_v<_FromType>)
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28 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr _ToType bit_cast(const _FromType& __from) noexcept {
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29 return __builtin_bit_cast(_ToType, __from);
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30 }
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31
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252
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32 #endif // _LIBCPP_STD_VER >= 20
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236
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33
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34 _LIBCPP_END_NAMESPACE_STD
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35
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36 #endif // _LIBCPP___BIT_BIT_CAST_H
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