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> |
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 | |
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 | |