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 // <optional>
11
12 // A program that necessitates the instantiation of template optional for
13 // (possibly cv-qualified) in_place_t is ill-formed.
14
15 #include <optional>
16
main(int,char **)17 int main(int, char**)
18 {
19 using std::optional;
20 using std::in_place_t;
21 using std::in_place;
22
23 optional<in_place_t> opt; // expected-note {{requested here}}
24 // expected-error@optional:* {{instantiation of optional with in_place_t is ill-formed}}
25
26 return 0;
27 }
28