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// type_traits
10
11// is_scalar
12
13#include <type_traits>
14#include <cstddef> // for std::nullptr_t
15#include "test_macros.h"
16
17template <class T>
18void test_is_scalar()
19{
20 static_assert( std::is_scalar<T>::value, "");
21 static_assert( std::is_scalar<const T>::value, "");
22 static_assert( std::is_scalar<volatile T>::value, "");
23 static_assert( std::is_scalar<const volatile T>::value, "");
24#if TEST_STD_VER > 14
25 static_assert( std::is_scalar_v<T>, "");
26 static_assert( std::is_scalar_v<const T>, "");
27 static_assert( std::is_scalar_v<volatile T>, "");
28 static_assert( std::is_scalar_v<const volatile T>, "");
29#endif
30}
31
32template <class T>
33void test_is_not_scalar()
34{
35 static_assert(!std::is_scalar<T>::value, "");
36 static_assert(!std::is_scalar<const T>::value, "");
37 static_assert(!std::is_scalar<volatile T>::value, "");
38 static_assert(!std::is_scalar<const volatile T>::value, "");
39#if TEST_STD_VER > 14
40 static_assert(!std::is_scalar_v<T>, "");
41 static_assert(!std::is_scalar_v<const T>, "");
42 static_assert(!std::is_scalar_v<volatile T>, "");
43 static_assert(!std::is_scalar_v<const volatile T>, "");
44#endif
45}
46
47class incomplete_type;
48
49class Empty
50{
51};
52
53class NotEmpty
54{
55 virtual ~NotEmpty();
56};
57
58union Union {};
59
60struct bit_zero
61{
62 int : 0;
63};
64
65class Abstract
66{
67 virtual ~Abstract() = 0;
68};
69
70enum Enum {zero, one};
71
72typedef void (*FunctionPtr)();
73
74
75int main(int, char**)
76{
77// Arithmetic types (3.9.1), enumeration types, pointer types, pointer to member types (3.9.2),
78// std::nullptr_t, and cv-qualified versions of these types (3.9.3)
79// are collectively called scalar types.
80
81 test_is_scalar<std::nullptr_t>();
82 test_is_scalar<short>();
83 test_is_scalar<unsigned short>();
84 test_is_scalar<int>();
85 test_is_scalar<unsigned int>();
86 test_is_scalar<long>();
87 test_is_scalar<unsigned long>();
88 test_is_scalar<bool>();
89 test_is_scalar<char>();
90 test_is_scalar<signed char>();
91 test_is_scalar<unsigned char>();
92 test_is_scalar<wchar_t>();
93 test_is_scalar<double>();
94 test_is_scalar<int*>();
95 test_is_scalar<const int*>();
96 test_is_scalar<int Empty::*>();
97 test_is_scalar<void (Empty::*)(int)>();
98 test_is_scalar<Enum>();
99 test_is_scalar<FunctionPtr>();
100
101 test_is_not_scalar<void>();
102 test_is_not_scalar<int&>();
103 test_is_not_scalar<int&&>();
104 test_is_not_scalar<char[3]>();
105 test_is_not_scalar<char[]>();
106 test_is_not_scalar<Union>();
107 test_is_not_scalar<Empty>();
108 test_is_not_scalar<incomplete_type>();
109 test_is_not_scalar<bit_zero>();
110 test_is_not_scalar<NotEmpty>();
111 test_is_not_scalar<Abstract>();
112 test_is_not_scalar<int(int)>();
113
114 return 0;
115}
116

source code of libcxx/test/std/utilities/meta/meta.unary/meta.unary.comp/is_scalar.pass.cpp