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
27int 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

source code of libcxx/test/std/depr/depr.function.objects/depr.base/unary_function.pass.cpp