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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <functional>
// REQUIRES: c++98 || c++03 || c++11 || c++14
// const_mem_fun1_ref_t
#define _LIBCPP_DISABLE_DEPRECATION_WARNINGS
#include <functional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
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(int, char**)
{
typedef std::const_mem_fun1_ref_t<double, A, unsigned> F;
static_assert((std::is_base_of<std::binary_function<A, unsigned, double>, F>::value), "");
const F f(&A::a4);
const A a = A();
assert(f(a, 6) == 5);
return 0;
}