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
21int 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

source code of libcxx/test/std/utilities/function.objects/comparisons/equal_to.pass.cpp