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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>
// reference_wrapper
// template <class... ArgTypes>
// requires Callable<T, ArgTypes&&...>
// Callable<T, ArgTypes&&...>::result_type
// operator()(ArgTypes&&... args) const;
#include <functional>
#include <cassert>
#include "test_macros.h"
// 0 args, return int
int count = 0;
int f_int_0()
{
return 3;
}
struct A_int_0
{
int operator()() {return 4;}
};
void
test_int_0()
{
// function
{
std::reference_wrapper<int ()> r1(f_int_0);
assert(r1() == 3);
}
// function pointer
{
int (*fp)() = f_int_0;
std::reference_wrapper<int (*)()> r1(fp);
assert(r1() == 3);
}
// functor
{
A_int_0 a0;
std::reference_wrapper<A_int_0> r1(a0);
assert(r1() == 4);
}
}
// 1 arg, return void
void f_void_1(int i)
{
count += i;
}
struct A_void_1
{
void operator()(int i)
{
count += i;
}
};
int main(int, char**)
{
test_int_0();
return 0;
}
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