chromium/third_party/libc++/src/include/__type_traits/conditional.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_CONDITIONAL_H
#define _LIBCPP___TYPE_TRAITS_CONDITIONAL_H

#include <__config>

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

_LIBCPP_BEGIN_NAMESPACE_STD

template <bool>
struct _IfImpl;

template <>
struct _IfImpl<true> { … };

template <>
struct _IfImpl<false> { … };

_If;

template <bool _Bp, class _If, class _Then>
struct _LIBCPP_TEMPLATE_VIS conditional { … };
conditional<false, _If, _Then>;

#if _LIBCPP_STD_VER >= 14
conditional_t;
#endif

// Helper so we can use "conditional_t" in all language versions.
__conditional_t;

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___TYPE_TRAITS_CONDITIONAL_H