chromium/third_party/libc++/src/include/__type_traits/is_always_bitcastable.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_ALWAYS_BITCASTABLE_H
#define _LIBCPP___TYPE_TRAITS_IS_ALWAYS_BITCASTABLE_H

#include <__config>
#include <__type_traits/integral_constant.h>
#include <__type_traits/is_integral.h>
#include <__type_traits/is_object.h>
#include <__type_traits/is_same.h>
#include <__type_traits/is_trivially_copyable.h>
#include <__type_traits/remove_cv.h>

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

_LIBCPP_BEGIN_NAMESPACE_STD

// Checks whether an object of type `From` can always be bit-cast to an object of type `To` and represent a valid value
// of type `To`. In other words, `From` and `To` have the same value representation and the set of values of `From` is
// a subset of the set of values of `To`.
//
// Note that types that cannot be assigned to each other using built-in assignment (e.g. arrays) might still be
// considered bit-castable.
template <class _From, class _To>
struct __is_always_bitcastable { … };

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___TYPE_TRAITS_IS_ALWAYS_BITCASTABLE_H