1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <functional>
11// REQUIRES: c++98 || c++03 || c++11 || c++14
12
13// mem_fun1_ref_t
14
15#include <functional>
16#include <type_traits>
17#include <cassert>
18
19struct A
20{
21    char a1() {return 5;}
22    short a2(int i) {return short(i+1);}
23    int a3() const {return 1;}
24    double a4(unsigned i) const {return i-1;}
25};
26
27int main()
28{
29    typedef std::mem_fun1_ref_t<short, A, int> F;
30    static_assert((std::is_base_of<std::binary_function<A, int, short>, F>::value), "");
31    const F f(&A::a2);
32    A a;
33    assert(f(a, 5) == 6);
34}
35