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 // <functional>
10 
11 // reference_wrapper
12 
13 // template <ObjectType T> reference_wrapper<T> ref(T& t);
14 
15 // Don't allow binding to a temp
16 
17 #include <functional>
18 
19 struct A {};
20 
21 const A source() {return A();}
22 
23 int main(int, char**)
24 {
25     std::reference_wrapper<const A> r = std::ref(source());
26     (void)r;
27 
28     return 0;
29 }
30