| //===----------------------------------------------------------------------===// |
| // |
| // 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) nullopt_t is ill-formed. |
| |
| #include <optional> |
| |
| int main() |
| { |
| using std::optional; |
| using std::nullopt_t; |
| using std::nullopt; |
| |
| optional<nullopt_t> opt; // expected-note 1 {{requested here}} |
| optional<const nullopt_t> opt1; // expected-note 1 {{requested here}} |
| optional<nullopt_t &> opt2; // expected-note 1 {{requested here}} |
| optional<nullopt_t &&> opt3; // expected-note 1 {{requested here}} |
| // expected-error@optional:* 4 {{instantiation of optional with nullopt_t is ill-formed}} |
| } |
