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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___CXX03___UTILITY_CONVERT_TO_INTEGRAL_H10#define _LIBCPP___CXX03___UTILITY_CONVERT_TO_INTEGRAL_H11 12#include <__cxx03/__config>13#include <__cxx03/__type_traits/enable_if.h>14#include <__cxx03/__type_traits/is_enum.h>15#include <__cxx03/__type_traits/is_floating_point.h>16#include <__cxx03/__type_traits/underlying_type.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 24inline _LIBCPP_HIDE_FROM_ABI int __convert_to_integral(int __val) { return __val; }25 26inline _LIBCPP_HIDE_FROM_ABI unsigned __convert_to_integral(unsigned __val) { return __val; }27 28inline _LIBCPP_HIDE_FROM_ABI long __convert_to_integral(long __val) { return __val; }29 30inline _LIBCPP_HIDE_FROM_ABI unsigned long __convert_to_integral(unsigned long __val) { return __val; }31 32inline _LIBCPP_HIDE_FROM_ABI long long __convert_to_integral(long long __val) { return __val; }33 34inline _LIBCPP_HIDE_FROM_ABI unsigned long long __convert_to_integral(unsigned long long __val) { return __val; }35 36template <typename _Fp, __enable_if_t<is_floating_point<_Fp>::value, int> = 0>37inline _LIBCPP_HIDE_FROM_ABI long long __convert_to_integral(_Fp __val) {38 return __val;39}40 41#ifndef _LIBCPP_HAS_NO_INT12842inline _LIBCPP_HIDE_FROM_ABI __int128_t __convert_to_integral(__int128_t __val) { return __val; }43 44inline _LIBCPP_HIDE_FROM_ABI __uint128_t __convert_to_integral(__uint128_t __val) { return __val; }45#endif46 47template <class _Tp, bool = is_enum<_Tp>::value>48struct __sfinae_underlying_type {49 typedef typename underlying_type<_Tp>::type type;50 typedef decltype(((type)1) + 0) __promoted_type;51};52 53template <class _Tp>54struct __sfinae_underlying_type<_Tp, false> {};55 56template <class _Tp>57inline _LIBCPP_HIDE_FROM_ABI typename __sfinae_underlying_type<_Tp>::__promoted_type __convert_to_integral(_Tp __val) {58 return __val;59}60 61_LIBCPP_END_NAMESPACE_STD62 63#endif // _LIBCPP___CXX03___UTILITY_CONVERT_TO_INTEGRAL_H64