//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <functional>
//
// reference_wrapper
//
// template <ObjectType T> reference_wrapper<const T> cref(const T& t);
//
// where T is an incomplete type (since C++20)
#include <functional>
#include <cassert>
#include "test_macros.h"
struct Foo;
Foo& get_foo();
void test() {
Foo const& foo = get_foo();
std::reference_wrapper<Foo const> ref = std::cref(foo);
assert(&ref.get() == &foo);
}
struct Foo { };
Foo& get_foo() {
static Foo foo;
return foo;
}
int main(int, char**) {
test();
return 0;
}