| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14 |
| |
| // <optional> |
| |
| // A program that necessitates the instantiation of template optional for |
| // (possibly cv-qualified) nullopt_t is ill-formed. |
| |
| #include <optional> |
| |
| void f() { |
| std::optional<std::nullopt_t> opt; // expected-note 1 {{requested here}} |
| std::optional<const std::nullopt_t> opt1; // expected-note 1 {{requested here}} |
| std::optional<std::nullopt_t &> opt2; // expected-note 1 {{requested here}} |
| std::optional<std::nullopt_t &&> opt3; // expected-note 1 {{requested here}} |
| // expected-error@optional:* 4 {{instantiation of optional with nullopt_t is ill-formed}} |
| } |
