58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03
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// UNSUPPORTED: (c++11 || c++14 || c++17) && !stdlib=libc++
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// Make sure the various node handles mark their .empty() method with
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// [[nodiscard]] starting with C++20
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#include <map>
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#include <set>
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#include <unordered_map>
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#include <unordered_set>
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#include "test_macros.h"
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void test() {
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#if TEST_STD_VER >= 17
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{
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std::map<int, int>::node_type node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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{
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std::multimap<int, int>::node_type node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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#endif // TEST_STD_VER >= 17
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{
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std::set<int> node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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{
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std::multiset<int> node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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{
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std::unordered_map<int, int> node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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{
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std::unordered_multimap<int, int> node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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{
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std::unordered_set<int> node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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{
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std::unordered_multiset<int> node;
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node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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}
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