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 
11 // mem_fun_t
12 
13 // REQUIRES: c++03 || c++11 || c++14
14 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
15 
16 #include <functional>
17 #include <type_traits>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
22 struct A
23 {
a1A24     char a1() {return 5;}
a2A25     short a2(int i) {return short(i+1);}
a3A26     int a3() const {return 1;}
a4A27     double a4(unsigned i) const {return i-1;}
28 };
29 
main(int,char **)30 int main(int, char**)
31 {
32     typedef std::mem_fun_t<char, A> F;
33     static_assert((std::is_base_of<std::unary_function<A*, char>, F>::value), "");
34     const F f(&A::a1);
35     A a;
36     assert(f(&a) == 5);
37 
38   return 0;
39 }
40