1 //===----------------------------------------------------------------------===//
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
7 //===----------------------------------------------------------------------===//
13 // bool empty() const noexcept;
15 // UNSUPPORTED: c++03, c++11, c++14, c++17
21 c
.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}