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 
11 // template<class T>
12 // concept floating_point = // see below
13 
14 #include <concepts>
15 #include <type_traits>
16 
17 #include "arithmetic.h"
18 
19 template <typename T>
CheckFloatingPointQualifiers()20 constexpr bool CheckFloatingPointQualifiers() {
21   constexpr bool result = std::floating_point<T>;
22   static_assert(std::floating_point<const T> == result);
23   static_assert(std::floating_point<volatile T> == result);
24   static_assert(std::floating_point<const volatile T> == result);
25 
26   static_assert(!std::floating_point<T&>);
27   static_assert(!std::floating_point<const T&>);
28   static_assert(!std::floating_point<volatile T&>);
29   static_assert(!std::floating_point<const volatile T&>);
30 
31   static_assert(!std::floating_point<T&&>);
32   static_assert(!std::floating_point<const T&&>);
33   static_assert(!std::floating_point<volatile T&&>);
34   static_assert(!std::floating_point<const volatile T&&>);
35 
36   static_assert(!std::floating_point<T*>);
37   static_assert(!std::floating_point<const T*>);
38   static_assert(!std::floating_point<volatile T*>);
39   static_assert(!std::floating_point<const volatile T*>);
40 
41   static_assert(!std::floating_point<T (*)()>);
42   static_assert(!std::floating_point<T (&)()>);
43   static_assert(!std::floating_point<T (&&)()>);
44 
45   return result;
46 }
47 
48 // floating-point types
49 static_assert(CheckFloatingPointQualifiers<float>());
50 static_assert(CheckFloatingPointQualifiers<double>());
51 static_assert(CheckFloatingPointQualifiers<long double>());
52 
53 // types that aren't floating-point
54 static_assert(!CheckFloatingPointQualifiers<signed char>());
55 static_assert(!CheckFloatingPointQualifiers<unsigned char>());
56 static_assert(!CheckFloatingPointQualifiers<short>());
57 static_assert(!CheckFloatingPointQualifiers<unsigned short>());
58 static_assert(!CheckFloatingPointQualifiers<int>());
59 static_assert(!CheckFloatingPointQualifiers<unsigned int>());
60 static_assert(!CheckFloatingPointQualifiers<long>());
61 static_assert(!CheckFloatingPointQualifiers<unsigned long>());
62 static_assert(!CheckFloatingPointQualifiers<long long>());
63 static_assert(!CheckFloatingPointQualifiers<unsigned long long>());
64 static_assert(!CheckFloatingPointQualifiers<wchar_t>());
65 static_assert(!CheckFloatingPointQualifiers<bool>());
66 static_assert(!CheckFloatingPointQualifiers<char>());
67 static_assert(!CheckFloatingPointQualifiers<char8_t>());
68 static_assert(!CheckFloatingPointQualifiers<char16_t>());
69 static_assert(!CheckFloatingPointQualifiers<char32_t>());
70 static_assert(!std::floating_point<void>);
71 
72 static_assert(!CheckFloatingPointQualifiers<ClassicEnum>());
73 static_assert(!CheckFloatingPointQualifiers<ScopedEnum>());
74 static_assert(!CheckFloatingPointQualifiers<EmptyStruct>());
75 static_assert(!CheckFloatingPointQualifiers<int EmptyStruct::*>());
76 static_assert(!CheckFloatingPointQualifiers<int (EmptyStruct::*)()>());
77