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 // plus
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::plus<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<int, F::result_type>::value), "");
29 #endif
30     assert(f(3, 2) == 5);
31 #if TEST_STD_VER > 11
32     typedef std::plus<> F2;
33     const F2 f2 = F2();
34     assert(f2(3,2) == 5);
35     assert(f2(3.0, 2) == 5);
36     assert(f2(3, 2.5) == 5.5);
37 
38     constexpr int foo = std::plus<int> () (3, 2);
39     static_assert ( foo == 5, "" );
40 
41     constexpr double bar = std::plus<> () (3.0, 2);
42     static_assert ( bar == 5.0, "" );
43 #endif
44 
45   return 0;
46 }
47