optional_rvalue_ref.fail.cpp revision 0cdbe6048173c1f05628dbc85430acf191a3e173 
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// <optional>
11
12// A program that necessitates the instantiation of template optional for a
13// reference type is ill-formed.
14
15#include <experimental/optional>
16
17int main()
18{
19#if _LIBCPP_STD_VER > 11
20    using std::experimental::optional;
21
22    optional<int&&> opt;
23#else
24#error
25#endif  // _LIBCPP_STD_VER > 11
26}
27