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
12// const_mem_fun_t
13
14#include <functional>
15#include <type_traits>
16#include <cassert>
17
18struct A
19{
20    char a1() {return 5;}
21    short a2(int i) {return short(i+1);}
22    int a3() const {return 1;}
23    double a4(unsigned i) const {return i-1;}
24};
25
26int main()
27{
28    typedef std::const_mem_fun_t<int, A> F;
29    static_assert((std::is_base_of<std::unary_function<const A*, int>, F>::value), "");
30    const F f(&A::a3);
31    const A a = A();
32    assert(f(&a) == 1);
33}
34