98 lines
3.8 KiB
C++
98 lines
3.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// UNSUPPORTED: libcpp-no-concepts
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// template<class T>
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// concept signed_integral = // see below
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#include <concepts>
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#include <type_traits>
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#include "arithmetic.h"
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#include "test_macros.h"
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template <typename T>
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constexpr bool CheckSignedIntegralQualifiers() {
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constexpr bool result = std::signed_integral<T>;
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static_assert(std::signed_integral<const T> == result);
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static_assert(std::signed_integral<volatile T> == result);
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static_assert(std::signed_integral<const volatile T> == result);
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static_assert(!std::signed_integral<T&>);
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static_assert(!std::signed_integral<const T&>);
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static_assert(!std::signed_integral<volatile T&>);
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static_assert(!std::signed_integral<const volatile T&>);
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static_assert(!std::signed_integral<T&&>);
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static_assert(!std::signed_integral<const T&&>);
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static_assert(!std::signed_integral<volatile T&&>);
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static_assert(!std::signed_integral<const volatile T&&>);
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static_assert(!std::signed_integral<T*>);
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static_assert(!std::signed_integral<const T*>);
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static_assert(!std::signed_integral<volatile T*>);
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static_assert(!std::signed_integral<const volatile T*>);
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static_assert(!std::signed_integral<T (*)()>);
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static_assert(!std::signed_integral<T (&)()>);
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static_assert(!std::signed_integral<T(&&)()>);
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return result;
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}
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// standard signed integers
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static_assert(CheckSignedIntegralQualifiers<signed char>());
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static_assert(CheckSignedIntegralQualifiers<short>());
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static_assert(CheckSignedIntegralQualifiers<int>());
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static_assert(CheckSignedIntegralQualifiers<long>());
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static_assert(CheckSignedIntegralQualifiers<long long>());
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// bool and character *may* be signed
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static_assert(CheckSignedIntegralQualifiers<wchar_t>() ==
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std::is_signed_v<wchar_t>);
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static_assert(CheckSignedIntegralQualifiers<bool>() == std::is_signed_v<bool>);
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static_assert(CheckSignedIntegralQualifiers<char>() == std::is_signed_v<char>);
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static_assert(CheckSignedIntegralQualifiers<char8_t>() ==
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std::is_signed_v<char8_t>);
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static_assert(CheckSignedIntegralQualifiers<char16_t>() ==
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std::is_signed_v<char16_t>);
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static_assert(CheckSignedIntegralQualifiers<char32_t>() ==
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std::is_signed_v<char32_t>);
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// integers that aren't signed integrals
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static_assert(!CheckSignedIntegralQualifiers<unsigned char>());
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static_assert(!CheckSignedIntegralQualifiers<unsigned short>());
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static_assert(!CheckSignedIntegralQualifiers<unsigned int>());
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static_assert(!CheckSignedIntegralQualifiers<unsigned long>());
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static_assert(!CheckSignedIntegralQualifiers<unsigned long long>());
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// extended integers
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#ifndef TEST_HAS_NO_INT128
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static_assert(CheckSignedIntegralQualifiers<__int128_t>());
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static_assert(!CheckSignedIntegralQualifiers<__uint128_t>());
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#endif
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// types that aren't even integers shouldn't be signed integers!
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static_assert(!std::signed_integral<void>);
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static_assert(!CheckSignedIntegralQualifiers<float>());
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static_assert(!CheckSignedIntegralQualifiers<double>());
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static_assert(!CheckSignedIntegralQualifiers<long double>());
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static_assert(!CheckSignedIntegralQualifiers<ClassicEnum>());
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static_assert(!CheckSignedIntegralQualifiers<ScopedEnum>());
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static_assert(!CheckSignedIntegralQualifiers<EmptyStruct>());
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static_assert(!CheckSignedIntegralQualifiers<int EmptyStruct::*>());
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static_assert(!CheckSignedIntegralQualifiers<int (EmptyStruct::*)()>());
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static_assert(CheckSubsumption(0));
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static_assert(CheckSubsumption(0U));
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int main(int, char**) { return 0; }
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