1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H 10*4bdff4beSrobert #define _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__config> 13*4bdff4beSrobert #include <__type_traits/enable_if.h> 14*4bdff4beSrobert #include <__type_traits/is_enum.h> 15*4bdff4beSrobert #include <__type_traits/is_floating_point.h> 16*4bdff4beSrobert #include <__type_traits/underlying_type.h> 17*4bdff4beSrobert 18*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19*4bdff4beSrobert # pragma GCC system_header 20*4bdff4beSrobert #endif 21*4bdff4beSrobert 22*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 23*4bdff4beSrobert 24*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(int __val)25*4bdff4beSrobertint __convert_to_integral(int __val) { return __val; } 26*4bdff4beSrobert 27*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(unsigned __val)28*4bdff4beSrobertunsigned __convert_to_integral(unsigned __val) { return __val; } 29*4bdff4beSrobert 30*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(long __val)31*4bdff4beSrobertlong __convert_to_integral(long __val) { return __val; } 32*4bdff4beSrobert 33*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(unsigned long __val)34*4bdff4beSrobertunsigned long __convert_to_integral(unsigned long __val) { return __val; } 35*4bdff4beSrobert 36*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(long long __val)37*4bdff4beSrobertlong long __convert_to_integral(long long __val) { return __val; } 38*4bdff4beSrobert 39*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(unsigned long long __val)40*4bdff4beSrobertunsigned long long __convert_to_integral(unsigned long long __val) {return __val; } 41*4bdff4beSrobert 42*4bdff4beSrobert template<typename _Fp> 43*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 44*4bdff4beSrobert typename enable_if<is_floating_point<_Fp>::value, long long>::type __convert_to_integral(_Fp __val)45*4bdff4beSrobert __convert_to_integral(_Fp __val) { return __val; } 46*4bdff4beSrobert 47*4bdff4beSrobert #ifndef _LIBCPP_HAS_NO_INT128 48*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(__int128_t __val)49*4bdff4beSrobert__int128_t __convert_to_integral(__int128_t __val) { return __val; } 50*4bdff4beSrobert 51*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __convert_to_integral(__uint128_t __val)52*4bdff4beSrobert__uint128_t __convert_to_integral(__uint128_t __val) { return __val; } 53*4bdff4beSrobert #endif 54*4bdff4beSrobert 55*4bdff4beSrobert template <class _Tp, bool = is_enum<_Tp>::value> 56*4bdff4beSrobert struct __sfinae_underlying_type 57*4bdff4beSrobert { 58*4bdff4beSrobert typedef typename underlying_type<_Tp>::type type; 59*4bdff4beSrobert typedef decltype(((type)1) + 0) __promoted_type; 60*4bdff4beSrobert }; 61*4bdff4beSrobert 62*4bdff4beSrobert template <class _Tp> 63*4bdff4beSrobert struct __sfinae_underlying_type<_Tp, false> {}; 64*4bdff4beSrobert 65*4bdff4beSrobert template <class _Tp> 66*4bdff4beSrobert inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 67*4bdff4beSrobert typename __sfinae_underlying_type<_Tp>::__promoted_type 68*4bdff4beSrobert __convert_to_integral(_Tp __val) { return __val; } 69*4bdff4beSrobert 70*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 71*4bdff4beSrobert 72*4bdff4beSrobert #endif // _LIBCPP___UTILITY_CONVERT_TO_INTEGRAL_H 73