chromium/third_party/libc++/src/include/__type_traits/is_trivially_relocatable.h

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___TYPE_TRAITS_IS_TRIVIALLY_RELOCATABLE_H
#define _LIBCPP___TYPE_TRAITS_IS_TRIVIALLY_RELOCATABLE_H

#include <__config>
#include <__type_traits/enable_if.h>
#include <__type_traits/integral_constant.h>
#include <__type_traits/is_same.h>
#include <__type_traits/is_trivially_copyable.h>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_BEGIN_NAMESPACE_STD

// A type is trivially relocatable if a move construct + destroy of the original object is equivalent to
// `memcpy(dst, src, sizeof(T))`.

#if __has_builtin(__is_trivially_relocatable)
template <class _Tp, class = void>
struct __libcpp_is_trivially_relocatable : integral_constant<bool, __is_trivially_relocatable(_Tp)> { … };
#else
template <class _Tp, class = void>
struct __libcpp_is_trivially_relocatable : is_trivially_copyable<_Tp> {};
#endif

__libcpp_is_trivially_relocatable<_Tp, __enable_if_t<is_same<_Tp, typename _Tp::__trivially_relocatable>::value>>;

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___TYPE_TRAITS_IS_TRIVIALLY_RELOCATABLE_H