1//===----------------------------------------------------------------------===//
2//
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
6//
7//===----------------------------------------------------------------------===//
8
9// <map>
10
11// key_compare key_comp() const;
12
13#include <map>
14#include <cassert>
15#include <string>
16
17int main(int, char**) {
18 typedef std::map<int, std::string> map_type;
19
20 map_type m;
21 std::pair<map_type::iterator, bool> p1 = m.insert(x: map_type::value_type(1, "abc"));
22 std::pair<map_type::iterator, bool> p2 = m.insert(x: map_type::value_type(2, "abc"));
23
24 const map_type& cm = m;
25
26 assert(cm.key_comp()(p1.first->first, p2.first->first));
27 assert(!cm.key_comp()(p2.first->first, p1.first->first));
28
29 return 0;
30}
31

source code of libcxx/test/std/containers/associative/map/map.observers/key_comp.pass.cpp