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
10 
11 // template <class T> constexpr add_const<T>& as_const(T& t) noexcept;      // C++17
12 // template <class T>           add_const<T>& as_const(const T&&) = delete; // C++17
13 
14 #include <utility>
15 
16 struct S {int i;};
17 
18 int main(int, char**)
19 {
20     std::as_const(S{});
21 
22   return 0;
23 }
24