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 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 // UNSUPPORTED: libcpp-no-concepts
11 
12 // template<class T>
13 // concept unsigned_integral = // see below
14 
15 #include <concepts>
16 #include <type_traits>
17 
18 #include "arithmetic.h"
19 #include "test_macros.h"
20 
21 template <typename T>
22 constexpr bool CheckUnsignedIntegralQualifiers() {
23   constexpr bool result = std::unsigned_integral<T>;
24   static_assert(std::unsigned_integral<const T> == result);
25   static_assert(std::unsigned_integral<volatile T> == result);
26   static_assert(std::unsigned_integral<const volatile T> == result);
27 
28   static_assert(!std::unsigned_integral<T&>);
29   static_assert(!std::unsigned_integral<const T&>);
30   static_assert(!std::unsigned_integral<volatile T&>);
31   static_assert(!std::unsigned_integral<const volatile T&>);
32 
33   static_assert(!std::unsigned_integral<T&&>);
34   static_assert(!std::unsigned_integral<const T&&>);
35   static_assert(!std::unsigned_integral<volatile T&&>);
36   static_assert(!std::unsigned_integral<const volatile T&&>);
37 
38   static_assert(!std::unsigned_integral<T*>);
39   static_assert(!std::unsigned_integral<const T*>);
40   static_assert(!std::unsigned_integral<volatile T*>);
41   static_assert(!std::unsigned_integral<const volatile T*>);
42 
43   static_assert(!std::unsigned_integral<T (*)()>);
44   static_assert(!std::unsigned_integral<T (&)()>);
45   static_assert(!std::unsigned_integral<T(&&)()>);
46 
47   return result;
48 }
49 
50 // standard unsigned types
51 static_assert(CheckUnsignedIntegralQualifiers<unsigned char>());
52 static_assert(CheckUnsignedIntegralQualifiers<unsigned short>());
53 static_assert(CheckUnsignedIntegralQualifiers<unsigned int>());
54 static_assert(CheckUnsignedIntegralQualifiers<unsigned long>());
55 static_assert(CheckUnsignedIntegralQualifiers<unsigned long long>());
56 
57 // Whether bool and character types are signed or unsigned is impl-defined
58 static_assert(CheckUnsignedIntegralQualifiers<wchar_t>() ==
59               !std::is_signed_v<wchar_t>);
60 static_assert(CheckUnsignedIntegralQualifiers<bool>() ==
61               !std::is_signed_v<bool>);
62 static_assert(CheckUnsignedIntegralQualifiers<char>() ==
63               !std::is_signed_v<char>);
64 static_assert(CheckUnsignedIntegralQualifiers<char8_t>() ==
65               !std::is_signed_v<char8_t>);
66 static_assert(CheckUnsignedIntegralQualifiers<char16_t>() ==
67               !std::is_signed_v<char16_t>);
68 static_assert(CheckUnsignedIntegralQualifiers<char32_t>() ==
69               !std::is_signed_v<char32_t>);
70 
71 // extended integers
72 #ifndef TEST_HAS_NO_INT128
73 static_assert(CheckUnsignedIntegralQualifiers<__uint128_t>());
74 static_assert(!CheckUnsignedIntegralQualifiers<__int128_t>());
75 #endif
76 
77 // integer types that aren't unsigned integrals
78 static_assert(!CheckUnsignedIntegralQualifiers<signed char>());
79 static_assert(!CheckUnsignedIntegralQualifiers<short>());
80 static_assert(!CheckUnsignedIntegralQualifiers<int>());
81 static_assert(!CheckUnsignedIntegralQualifiers<long>());
82 static_assert(!CheckUnsignedIntegralQualifiers<long long>());
83 
84 static_assert(!std::unsigned_integral<void>);
85 static_assert(!CheckUnsignedIntegralQualifiers<float>());
86 static_assert(!CheckUnsignedIntegralQualifiers<double>());
87 static_assert(!CheckUnsignedIntegralQualifiers<long double>());
88 
89 static_assert(!CheckUnsignedIntegralQualifiers<ClassicEnum>());
90 static_assert(!CheckUnsignedIntegralQualifiers<ScopedEnum>());
91 static_assert(!CheckUnsignedIntegralQualifiers<EmptyStruct>());
92 static_assert(!CheckUnsignedIntegralQualifiers<int EmptyStruct::*>());
93 static_assert(!CheckUnsignedIntegralQualifiers<int (EmptyStruct::*)()>());
94 
95 static_assert(CheckSubsumption(0));
96 static_assert(CheckSubsumption(0U));
97 
98 int main(int, char**) { return 0; }
99