| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // template<class T> |
| // concept signed_integral = // see below |
| |
| #include <concepts> |
| #include <type_traits> |
| |
| #include "arithmetic.h" |
| #include "test_macros.h" |
| |
| template <typename T> |
| constexpr bool CheckSignedIntegralQualifiers() { |
| constexpr bool result = std::signed_integral<T>; |
| static_assert(std::signed_integral<const T> == result); |
| static_assert(std::signed_integral<volatile T> == result); |
| static_assert(std::signed_integral<const volatile T> == result); |
| |
| static_assert(!std::signed_integral<T&>); |
| static_assert(!std::signed_integral<const T&>); |
| static_assert(!std::signed_integral<volatile T&>); |
| static_assert(!std::signed_integral<const volatile T&>); |
| |
| static_assert(!std::signed_integral<T&&>); |
| static_assert(!std::signed_integral<const T&&>); |
| static_assert(!std::signed_integral<volatile T&&>); |
| static_assert(!std::signed_integral<const volatile T&&>); |
| |
| static_assert(!std::signed_integral<T*>); |
| static_assert(!std::signed_integral<const T*>); |
| static_assert(!std::signed_integral<volatile T*>); |
| static_assert(!std::signed_integral<const volatile T*>); |
| |
| static_assert(!std::signed_integral<T (*)()>); |
| static_assert(!std::signed_integral<T (&)()>); |
| static_assert(!std::signed_integral<T(&&)()>); |
| |
| return result; |
| } |
| |
| // standard signed integers |
| static_assert(CheckSignedIntegralQualifiers<signed char>()); |
| static_assert(CheckSignedIntegralQualifiers<short>()); |
| static_assert(CheckSignedIntegralQualifiers<int>()); |
| static_assert(CheckSignedIntegralQualifiers<long>()); |
| static_assert(CheckSignedIntegralQualifiers<long long>()); |
| |
| // bool and character *may* be signed |
| static_assert(CheckSignedIntegralQualifiers<wchar_t>() == |
| std::is_signed_v<wchar_t>); |
| static_assert(CheckSignedIntegralQualifiers<bool>() == std::is_signed_v<bool>); |
| static_assert(CheckSignedIntegralQualifiers<char>() == std::is_signed_v<char>); |
| static_assert(CheckSignedIntegralQualifiers<char8_t>() == |
| std::is_signed_v<char8_t>); |
| static_assert(CheckSignedIntegralQualifiers<char16_t>() == |
| std::is_signed_v<char16_t>); |
| static_assert(CheckSignedIntegralQualifiers<char32_t>() == |
| std::is_signed_v<char32_t>); |
| |
| // integers that aren't signed integrals |
| static_assert(!CheckSignedIntegralQualifiers<unsigned char>()); |
| static_assert(!CheckSignedIntegralQualifiers<unsigned short>()); |
| static_assert(!CheckSignedIntegralQualifiers<unsigned int>()); |
| static_assert(!CheckSignedIntegralQualifiers<unsigned long>()); |
| static_assert(!CheckSignedIntegralQualifiers<unsigned long long>()); |
| |
| // extended integers |
| #ifndef TEST_HAS_NO_INT128 |
| static_assert(CheckSignedIntegralQualifiers<__int128_t>()); |
| static_assert(!CheckSignedIntegralQualifiers<__uint128_t>()); |
| #endif |
| |
| // types that aren't even integers shouldn't be signed integers! |
| static_assert(!std::signed_integral<void>); |
| static_assert(!CheckSignedIntegralQualifiers<float>()); |
| static_assert(!CheckSignedIntegralQualifiers<double>()); |
| static_assert(!CheckSignedIntegralQualifiers<long double>()); |
| |
| static_assert(!CheckSignedIntegralQualifiers<ClassicEnum>()); |
| static_assert(!CheckSignedIntegralQualifiers<ScopedEnum>()); |
| static_assert(!CheckSignedIntegralQualifiers<EmptyStruct>()); |
| static_assert(!CheckSignedIntegralQualifiers<int EmptyStruct::*>()); |
| static_assert(!CheckSignedIntegralQualifiers<int (EmptyStruct::*)()>()); |
| |
| static_assert(CheckSubsumption(0)); |
| static_assert(CheckSubsumption(0U)); |
| |
| int main(int, char**) { return 0; } |