chromium/third_party/libc++/src/include/__type_traits/underlying_type.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_UNDERLYING_TYPE_H
#define _LIBCPP___TYPE_TRAITS_UNDERLYING_TYPE_H

#include <__config>
#include <__type_traits/is_enum.h>

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

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Tp, bool = is_enum<_Tp>::value>
struct __underlying_type_impl;

__underlying_type_impl<_Tp, false>;

__underlying_type_impl<_Tp, true>;

template <class _Tp>
struct underlying_type : __underlying_type_impl<_Tp, is_enum<_Tp>::value> { … };

#if _LIBCPP_STD_VER >= 14
underlying_type_t;
#endif

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___TYPE_TRAITS_UNDERLYING_TYPE_H