path: root/libcxx/test/utilities/function.objects/member.pointer.adaptors/mem_fun_t.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <functional>

// mem_fun_t

#include <functional>
#include <type_traits>
#include <cassert>

struct A
{
    char a1() {return 5;}
    short a2(int i) {return short(i+1);}
    int a3() const {return 1;}
    double a4(unsigned i) const {return i-1;}
};

int main()
{
    typedef std::mem_fun_t<char, A> F;
    static_assert((std::is_base_of<std::unary_function<A*, char>, F>::value), "");
    const F f(&A::a1);
    A a;
    assert(f(&a) == 5);
}