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_set>
10
11// template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
12// class Alloc = allocator<Value>>
13// class unordered_set
14
15// key_equal key_eq() const;
16
17#include <unordered_set>
18#include <cassert>
19
20int main(int, char**) {
21 typedef std::unordered_set<int> set_type;
22
23 set_type s;
24
25 std::pair<set_type::iterator, bool> p1 = s.insert(x: 1);
26 std::pair<set_type::iterator, bool> p2 = s.insert(x: 2);
27
28 const set_type& cs = s;
29
30 assert(cs.key_eq()(*p1.first, *p1.first));
31 assert(cs.key_eq()(*p2.first, *p2.first));
32
33 assert(!cs.key_eq()(*p1.first, *p2.first));
34 assert(!cs.key_eq()(*p2.first, *p1.first));
35
36 return 0;
37}
38

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