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
main(int,char **)20 int 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(1);
26 std::pair<set_type::iterator, bool> p2 = s.insert(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