1 | //===----------------------------------------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
10 | |
11 | // <functional> |
12 | // |
13 | // reference_wrapper |
14 | // |
15 | // template <ObjectType T> reference_wrapper<const T> cref(const T& t); |
16 | // |
17 | // where T is an incomplete type (since C++20) |
18 | |
19 | #include <functional> |
20 | #include <cassert> |
21 | |
22 | #include "test_macros.h" |
23 | |
24 | |
25 | struct Foo; |
26 | |
27 | Foo& get_foo(); |
28 | |
29 | void test() { |
30 | Foo const& foo = get_foo(); |
31 | std::reference_wrapper<Foo const> ref = std::cref(foo); |
32 | assert(&ref.get() == &foo); |
33 | } |
34 | |
35 | struct Foo { }; |
36 | |
37 | Foo& get_foo() { |
38 | static Foo foo; |
39 | return foo; |
40 | } |
41 | |
42 | int main(int, char**) { |
43 | test(); |
44 | return 0; |
45 | } |
46 | |