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_volatile
12
13#include <type_traits>
14#include "test_macros.h"
15
16template <class T>
17void test_is_volatile()
18{
19 static_assert(!std::is_volatile<T>::value, "");
20 static_assert(!std::is_volatile<const T>::value, "");
21 static_assert( std::is_volatile<volatile T>::value, "");
22 static_assert( std::is_volatile<const volatile T>::value, "");
23#if TEST_STD_VER > 14
24 static_assert(!std::is_volatile_v<T>, "");
25 static_assert(!std::is_volatile_v<const T>, "");
26 static_assert( std::is_volatile_v<volatile T>, "");
27 static_assert( std::is_volatile_v<const volatile T>, "");
28#endif
29}
30
31struct A; // incomplete
32
33int main(int, char**)
34{
35 test_is_volatile<void>();
36 test_is_volatile<int>();
37 test_is_volatile<double>();
38 test_is_volatile<int*>();
39 test_is_volatile<const int*>();
40 test_is_volatile<char[3]>();
41 test_is_volatile<char[]>();
42
43 test_is_volatile<A>();
44
45 static_assert(!std::is_volatile<int&>::value, "");
46 static_assert(!std::is_volatile<volatile int&>::value, "");
47
48 return 0;
49}
50

source code of libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_volatile.pass.cpp