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
main(int,char **)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