| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <string> |
| |
| // class deque |
| |
| // bool empty() const noexcept; // constexpr since C++20 |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| #include <string> |
| |
| void f() { |
| std::string c; |
| c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
