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// <unordered_map>
10
11// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
12// class Alloc = allocator<pair<const Key, T>>>
13// class unordered_multimap
14
15// hasher key_eq() const;
16
17#include <unordered_map>
18#include <string>
19#include <cassert>
20
21#include "test_macros.h"
22
23int main(int, char**) {
24 typedef std::unordered_multimap<int, std::string> map_type;
25
26 map_type m;
27 map_type::iterator i1 = m.insert(map_type::value_type(1, "abc"));
28 map_type::iterator i2 = m.insert(map_type::value_type(1, "bcd"));
29 map_type::iterator i3 = m.insert(map_type::value_type(2, "abc"));
30
31 const map_type& cm = m;
32
33 assert(cm.key_eq()(i1->first, i1->first));
34 assert(cm.key_eq()(i2->first, i2->first));
35 assert(cm.key_eq()(i3->first, i3->first));
36
37 assert(cm.key_eq()(i1->first, i2->first));
38 assert(cm.key_eq()(i2->first, i1->first));
39
40 assert(!cm.key_eq()(i1->first, i3->first));
41 assert(!cm.key_eq()(i3->first, i1->first));
42
43 assert(!cm.key_eq()(i2->first, i3->first));
44 assert(!cm.key_eq()(i3->first, i2->first));
45
46 return 0;
47}
48

source code of libcxx/test/std/containers/unord/unord.multimap/key_eq.pass.cpp