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 // integral_constant
12 
13 #include <type_traits>
14 #include <cassert>
15 
16 #include "test_macros.h"
17 
18 int main(int, char**)
19 {
20     typedef std::integral_constant<int, 5> _5;
21     static_assert(_5::value == 5, "");
22     static_assert((std::is_same<_5::value_type, int>::value), "");
23     static_assert((std::is_same<_5::type, _5>::value), "");
24 #if TEST_STD_VER >= 11
25     static_assert((_5() == 5), "");
26 #endif
27     assert(_5() == 5);
28 
29 
30 #if TEST_STD_VER > 11
31     static_assert ( _5{}() == 5, "" );
32     static_assert ( std::true_type{}(), "" );
33 #endif
34 
35     static_assert(std::false_type::value == false, "");
36     static_assert((std::is_same<std::false_type::value_type, bool>::value), "");
37     static_assert((std::is_same<std::false_type::type, std::false_type>::value), "");
38 
39     static_assert(std::true_type::value == true, "");
40     static_assert((std::is_same<std::true_type::value_type, bool>::value), "");
41     static_assert((std::is_same<std::true_type::type, std::true_type>::value), "");
42 
43     std::false_type f1;
44     std::false_type f2 = f1;
45     assert(!f2);
46 
47     std::true_type t1;
48     std::true_type t2 = t1;
49     assert(t2);
50 
51   return 0;
52 }
53