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 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
10 
11 // <functional>
12 
13 // equal_to
14 
15 #include <functional>
16 #include <type_traits>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 int main(int, char**)
22 {
23     typedef std::equal_to<int> F;
24     const F f = F();
25 #if TEST_STD_VER <= 17
26     static_assert((std::is_same<int, F::first_argument_type>::value), "" );
27     static_assert((std::is_same<int, F::second_argument_type>::value), "" );
28     static_assert((std::is_same<bool, F::result_type>::value), "" );
29 #endif
30     assert(f(36, 36));
31     assert(!f(36, 6));
32 #if TEST_STD_VER > 11
33     typedef std::equal_to<> F2;
34     const F2 f2 = F2();
35     assert(f2(36, 36));
36     assert(!f2(36, 6));
37     assert(f2(36, 36.0));
38     assert(f2(36.0, 36L));
39 
40     constexpr bool foo = std::equal_to<int> () (36, 36);
41     static_assert ( foo, "" );
42 
43     constexpr bool bar = std::equal_to<> () (36.0, 36);
44     static_assert ( bar, "" );
45 #endif
46 
47   return 0;
48 }
49