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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>
// 0 args, return void
int count = 0;
void f_void_0()
{
++count;
}
struct A_void_0
{
void operator()() {++count;}
};
void
test_void_0()
{
int save_count = count;
// function
{
std::reference_wrapper<void ()> r1(f_void_0);
r1();
assert(count == save_count+1);
save_count = count;
}
// function pointer
{
void (*fp)() = f_void_0;
std::reference_wrapper<void (*)()> r1(fp);
r1();
assert(count == save_count+1);
save_count = count;
}
// functor
{
A_void_0 a0;
std::reference_wrapper<A_void_0> r1(a0);
r1();
assert(count == save_count+1);
save_count = count;
}
}
int main(int, char**)
{
test_void_0();
return 0;
}
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