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convert_to_integral.h
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convert_to_integral.h
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//===----------------------------------------------------------------------===//
//
// 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_CONVERT_TO_INTEGRAL_H
#define _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H
#include <__config>
#include <__type_traits/enable_if.h>
#include <__type_traits/is_enum.h>
#include <__type_traits/is_floating_point.h>
#include <__type_traits/underlying_type.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
int __convert_to_integral(int __val) { return __val; }
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
unsigned __convert_to_integral(unsigned __val) { return __val; }
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
long __convert_to_integral(long __val) { return __val; }
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
unsigned long __convert_to_integral(unsigned long __val) { return __val; }
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
long long __convert_to_integral(long long __val) { return __val; }
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
unsigned long long __convert_to_integral(unsigned long long __val) {return __val; }
template<typename _Fp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
typename enable_if<is_floating_point<_Fp>::value, long long>::type
__convert_to_integral(_Fp __val) { return __val; }
#ifndef _LIBCPP_HAS_NO_INT128
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
__int128_t __convert_to_integral(__int128_t __val) { return __val; }
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
__uint128_t __convert_to_integral(__uint128_t __val) { return __val; }
#endif
template <class _Tp, bool = is_enum<_Tp>::value>
struct __sfinae_underlying_type
{
typedef typename underlying_type<_Tp>::type type;
typedef decltype(((type)1) + 0) __promoted_type;
};
template <class _Tp>
struct __sfinae_underlying_type<_Tp, false> {};
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
typename __sfinae_underlying_type<_Tp>::__promoted_type
__convert_to_integral(_Tp __val) { return __val; }
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H