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<T> |
14 | // |
15 | // where T is an incomplete type (since C++20) |
16 | |
17 | |
18 | #include <functional> |
19 | #include <cassert> |
20 | |
21 | #include "test_macros.h" |
22 | |
23 | |
24 | struct Foo; |
25 | |
26 | Foo& get_foo(); |
27 | |
28 | void test() { |
29 | Foo& foo = get_foo(); |
30 | std::reference_wrapper<Foo> ref{foo}; |
31 | assert(&ref.get() == &foo); |
32 | } |
33 | |
34 | struct Foo { }; |
35 | |
36 | Foo& get_foo() { |
37 | static Foo foo; |
38 | return foo; |
39 | } |
40 | |
41 | int main(int, char**) { |
42 | test(); |
43 | return 0; |
44 | } |
45 | |