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