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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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___CXX03___UTILITY_CONVERT_TO_INTEGRAL_H |
| 10 | #define _LIBCPP___CXX03___UTILITY_CONVERT_TO_INTEGRAL_H |
| 11 | |
| 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_header |
| 20 | #endif |
| 21 | |
| 22 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 23 | |
| 24 | inline _LIBCPP_HIDE_FROM_ABI int __convert_to_integral(int __val) { return __val; } |
| 25 | |
| 26 | inline _LIBCPP_HIDE_FROM_ABI unsigned __convert_to_integral(unsigned __val) { return __val; } |
| 27 | |
| 28 | inline _LIBCPP_HIDE_FROM_ABI long __convert_to_integral(long __val) { return __val; } |
| 29 | |
| 30 | inline _LIBCPP_HIDE_FROM_ABI unsigned long __convert_to_integral(unsigned long __val) { return __val; } |
| 31 | |
| 32 | inline _LIBCPP_HIDE_FROM_ABI long long __convert_to_integral(long long __val) { return __val; } |
| 33 | |
| 34 | inline _LIBCPP_HIDE_FROM_ABI unsigned long long __convert_to_integral(unsigned long long __val) { return __val; } |
| 35 | |
| 36 | template <typename _Fp, __enable_if_t<is_floating_point<_Fp>::value, int> = 0> |
| 37 | inline _LIBCPP_HIDE_FROM_ABI long long __convert_to_integral(_Fp __val) { |
| 38 | return __val; |
| 39 | } |
| 40 | |
| 41 | #ifndef _LIBCPP_HAS_NO_INT128 |
| 42 | inline _LIBCPP_HIDE_FROM_ABI __int128_t __convert_to_integral(__int128_t __val) { return __val; } |
| 43 | |
| 44 | inline _LIBCPP_HIDE_FROM_ABI __uint128_t __convert_to_integral(__uint128_t __val) { return __val; } |
| 45 | #endif |
| 46 | |
| 47 | template <class _Tp, bool = is_enum<_Tp>::value> |
| 48 | struct __sfinae_underlying_type { |
| 49 | typedef typename underlying_type<_Tp>::type type; |
| 50 | typedef decltype(((type)1) + 0) __promoted_type; |
| 51 | }; |
| 52 | |
| 53 | template <class _Tp> |
| 54 | struct __sfinae_underlying_type<_Tp, false> {}; |
| 55 | |
| 56 | template <class _Tp> |
| 57 | inline _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_STD |
| 62 | |
| 63 | #endif // _LIBCPP___CXX03___UTILITY_CONVERT_TO_INTEGRAL_H |
| 64 |
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