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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <optional>
// A program that necessitates the instantiation of template optional for
// (possibly cv-qualified) in_place_t is ill-formed.
#include <optional>
int main()
{
using std::optional;
using std::in_place_t;
using std::in_place;
optional<in_place_t> opt; // expected-note {{requested here}}
// expected-error@optional:* {{"instantiation of optional with in_place_t is ill-formed"}}
}
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