forked from OSchip/llvm-project
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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___UTILITY_TO_UNDERLYING_H
|
|
#define _LIBCPP___UTILITY_TO_UNDERLYING_H
|
|
|
|
#include <__config>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY constexpr typename underlying_type<_Tp>::type
|
|
__to_underlying(_Tp __val) noexcept {
|
|
return static_cast<typename underlying_type<_Tp>::type>(__val);
|
|
}
|
|
#endif // !_LIBCPP_CXX03_LANG
|
|
|
|
#if _LIBCPP_STD_VER > 20
|
|
template <class _Tp>
|
|
_LIBCPP_NODISCARD_EXT _LIBCPP_INLINE_VISIBILITY constexpr underlying_type_t<_Tp>
|
|
to_underlying(_Tp __val) noexcept {
|
|
return _VSTD::__to_underlying(__val);
|
|
}
|
|
#endif
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___UTILITY_TO_UNDERLYING_H
|