1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // UNSUPPORTED: c++98, c++03, c++11, c++14
11
12 // template <class T> constexpr add_const<T>& as_const(T& t) noexcept; // C++17
13 // template <class T> add_const<T>& as_const(const T&&) = delete; // C++17
14
15 #include <utility>
16
17 struct S {int i;};
18
main()19 int main()
20 {
21 std::as_const(S{});
22 }
23