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 // REQUIRES: c++03 || c++11 || c++14
11 // unary_function was removed in C++17
12 
13 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
14 
15 // template <class Arg, class Result>
16 // struct unary_function
17 // {
18 //     typedef Arg    argument_type;
19 //     typedef Result result_type;
20 // };
21 
22 #include <functional>
23 #include <type_traits>
24 
25 #include "test_macros.h"
26 
27 int main(int, char**)
28 {
29     static_assert((std::is_same<std::unary_function<unsigned, char>::argument_type, unsigned>::value), "");
30     static_assert((std::is_same<std::unary_function<unsigned, char>::result_type, char>::value), "");
31 
32   return 0;
33 }
34