1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // type_traits
11
12 // is_const
13
14 #include <type_traits>
15 #include "test_macros.h"
16
17 template <class T>
test_is_const()18 void test_is_const()
19 {
20 static_assert(!std::is_const<T>::value, "");
21 static_assert( std::is_const<const T>::value, "");
22 static_assert(!std::is_const<volatile T>::value, "");
23 static_assert( std::is_const<const volatile T>::value, "");
24 #if TEST_STD_VER > 14
25 static_assert(!std::is_const_v<T>, "");
26 static_assert( std::is_const_v<const T>, "");
27 static_assert(!std::is_const_v<volatile T>, "");
28 static_assert( std::is_const_v<const volatile T>, "");
29 #endif
30 }
31
32 struct A; // incomplete
33
main()34 int main()
35 {
36 test_is_const<void>();
37 test_is_const<int>();
38 test_is_const<double>();
39 test_is_const<int*>();
40 test_is_const<const int*>();
41 test_is_const<char[3]>();
42 test_is_const<char[]>();
43
44 test_is_const<A>();
45
46 static_assert(!std::is_const<int&>::value, "");
47 static_assert(!std::is_const<const int&>::value, "");
48 }
49