1bdd1243dSDimitry Andric //===----------------------------------------------------------------------===// 2bdd1243dSDimitry Andric // 3bdd1243dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4bdd1243dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5bdd1243dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6bdd1243dSDimitry Andric // 7bdd1243dSDimitry Andric //===----------------------------------------------------------------------===// 8bdd1243dSDimitry Andric 9bdd1243dSDimitry Andric #ifndef _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H 10bdd1243dSDimitry Andric #define _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H 11bdd1243dSDimitry Andric 12bdd1243dSDimitry Andric #include <__config> 13bdd1243dSDimitry Andric #include <__type_traits/enable_if.h> 14bdd1243dSDimitry Andric #include <__type_traits/is_enum.h> 15bdd1243dSDimitry Andric #include <__type_traits/is_floating_point.h> 16bdd1243dSDimitry Andric #include <__type_traits/underlying_type.h> 17bdd1243dSDimitry Andric 18bdd1243dSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19bdd1243dSDimitry Andric # pragma GCC system_header 20bdd1243dSDimitry Andric #endif 21bdd1243dSDimitry Andric 22bdd1243dSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 23bdd1243dSDimitry Andric 24*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR int __convert_to_integral(int __val) { return __val; } 25bdd1243dSDimitry Andric 26*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR unsigned __convert_to_integral(unsigned __val) { return __val; } 27bdd1243dSDimitry Andric 28*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR long __convert_to_integral(long __val) { return __val; } 29bdd1243dSDimitry Andric 30*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR unsigned long __convert_to_integral(unsigned long __val) { 31*cb14a3feSDimitry Andric return __val; 32*cb14a3feSDimitry Andric } 33bdd1243dSDimitry Andric 34*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR long long __convert_to_integral(long long __val) { return __val; } 35bdd1243dSDimitry Andric 36*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR unsigned long long __convert_to_integral(unsigned long long __val) { 37*cb14a3feSDimitry Andric return __val; 38*cb14a3feSDimitry Andric } 39bdd1243dSDimitry Andric 405f757f3fSDimitry Andric template <typename _Fp, __enable_if_t<is_floating_point<_Fp>::value, int> = 0> 41*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR long long __convert_to_integral(_Fp __val) { 42*cb14a3feSDimitry Andric return __val; 43*cb14a3feSDimitry Andric } 44bdd1243dSDimitry Andric 45bdd1243dSDimitry Andric #ifndef _LIBCPP_HAS_NO_INT128 46*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __int128_t __convert_to_integral(__int128_t __val) { return __val; } 47bdd1243dSDimitry Andric 48*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __uint128_t __convert_to_integral(__uint128_t __val) { return __val; } 49bdd1243dSDimitry Andric #endif 50bdd1243dSDimitry Andric 51bdd1243dSDimitry Andric template <class _Tp, bool = is_enum<_Tp>::value> 52*cb14a3feSDimitry Andric struct __sfinae_underlying_type { 53bdd1243dSDimitry Andric typedef typename underlying_type<_Tp>::type type; 54bdd1243dSDimitry Andric typedef decltype(((type)1) + 0) __promoted_type; 55bdd1243dSDimitry Andric }; 56bdd1243dSDimitry Andric 57bdd1243dSDimitry Andric template <class _Tp> 58bdd1243dSDimitry Andric struct __sfinae_underlying_type<_Tp, false> {}; 59bdd1243dSDimitry Andric 60bdd1243dSDimitry Andric template <class _Tp> 61*cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR typename __sfinae_underlying_type<_Tp>::__promoted_type 62*cb14a3feSDimitry Andric __convert_to_integral(_Tp __val) { 63*cb14a3feSDimitry Andric return __val; 64*cb14a3feSDimitry Andric } 65bdd1243dSDimitry Andric 66bdd1243dSDimitry Andric _LIBCPP_END_NAMESPACE_STD 67bdd1243dSDimitry Andric 68bdd1243dSDimitry Andric #endif // _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H 69