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 // <functional>
10 
11 // equal_to
12 
13 #include <functional>
14 #include <type_traits>
15 #include <cassert>
16 
17 #include "test_macros.h"
18 
19 int main(int, char**)
20 {
21     typedef std::equal_to<int> F;
22     const F f = F();
23     static_assert((std::is_same<int, F::first_argument_type>::value), "" );
24     static_assert((std::is_same<int, F::second_argument_type>::value), "" );
25     static_assert((std::is_same<bool, F::result_type>::value), "" );
26     assert(f(36, 36));
27     assert(!f(36, 6));
28 #if TEST_STD_VER > 11
29     typedef std::equal_to<> F2;
30     const F2 f2 = F2();
31     assert(f2(36, 36));
32     assert(!f2(36, 6));
33     assert(f2(36, 36.0));
34     assert(f2(36.0, 36L));
35 
36     constexpr bool foo = std::equal_to<int> () (36, 36);
37     static_assert ( foo, "" );
38 
39     constexpr bool bar = std::equal_to<> () (36.0, 36);
40     static_assert ( bar, "" );
41 #endif
42 
43   return 0;
44 }
45