21         std::map<int, int>::node_type node;  in test()  local
22 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
25         std::multimap<int, int>::node_type node;  in test()  local
26 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
29         std::set<int> node;  in test()  local
30 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
33         std::multiset<int> node;  in test()  local
34 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
37         std::unordered_map<int, int> node;  in test()  local
38 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
41         std::unordered_multimap<int, int> node;  in test()  local
42 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
45         std::unordered_set<int> node;  in test()  local
46 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()
49         std::unordered_multiset<int> node;  in test()  local
50 …node.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' at…  in test()