| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // UNSUPPORTED: (c++11 || c++14 || c++17) && !stdlib=libc++ |
| |
| // 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> |
| |
| #include "test_macros.h" |
| |
| void test() { |
| #if TEST_STD_VER >= 17 |
| { |
| 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}} |
| } |
| #endif // TEST_STD_VER >= 17 |
| { |
| 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}} |
| } |
| } |