| 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, c++17, c++20 |
| 10 | |
| 11 | // <flat_set> |
| 12 | |
| 13 | // [[nodiscard]] bool empty() const noexcept; |
| 14 | |
| 15 | #include <flat_set> |
| 16 | |
| 17 | void f() { |
| 18 | std::flat_multiset<int> c; |
| 19 | c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| 20 | } |
| 21 |