a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
766 B
C++
29 lines
766 B
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <optional>
|
|
|
|
// A program that necessitates the instantiation of template optional for
|
|
// (possibly cv-qualified) null_opt_t is ill-formed.
|
|
|
|
#include <experimental/optional>
|
|
|
|
int main()
|
|
{
|
|
#if _LIBCPP_STD_VER > 11
|
|
using std::experimental::optional;
|
|
using std::experimental::nullopt_t;
|
|
using std::experimental::nullopt;
|
|
|
|
optional<nullopt_t> opt;
|
|
#else
|
|
#error
|
|
#endif // _LIBCPP_STD_VER > 11
|
|
}
|