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 // <optional>
12
13 // A program that necessitates the instantiation of template optional for
14 // (possibly cv-qualified) in_place_t is ill-formed.
15
16 #include <optional>
17
f()18 void f() {
19 std::optional<std::in_place_t> opt; // expected-note {{requested here}}
20 // expected-error@optional:* {{instantiation of optional with in_place_t is ill-formed}}
21 }
22