| //===----------------------------------------------------------------------===// |
| // |
| // 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, c++17 |
| |
| // Make sure the various node handles mark their .empty() method with |
| // [[nodiscard]] starting with C++20 |
| |
| #include <map> |
| #include <set> |
| #include <unordered_map> |
| #include <unordered_set> |
| |
| void test() { |
| { |
| std::map<int, int>::node_type node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::multimap<int, int>::node_type node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::set<int> node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::multiset<int> node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::unordered_map<int, int> node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::unordered_multimap<int, int> node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::unordered_set<int> node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| { |
| std::unordered_multiset<int> node; |
| node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
| } |
| } |