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_multiset
14
15// pair<const_iterator, const_iterator> equal_range(const key_type& k) const;
16
17#include <unordered_set>
18#include <cassert>
19
20#include "test_macros.h"
21#include "min_allocator.h"
22
23int main(int, char**) {
24 {
25 typedef std::unordered_multiset<int> C;
26 typedef C::const_iterator I;
27 typedef int P;
28 P a[] = {P(10), P(20), P(30), P(40), P(50), P(50), P(50), P(60), P(70), P(80)};
29 const C c(std::begin(arr&: a), std::end(arr&: a));
30 std::pair<I, I> r = c.equal_range(x: 30);
31 assert(std::distance(r.first, r.second) == 1);
32 assert(*r.first == 30);
33 r = c.equal_range(x: 5);
34 assert(std::distance(r.first, r.second) == 0);
35 r = c.equal_range(x: 50);
36 assert(std::distance(r.first, r.second) == 3);
37 assert(*r.first == 50);
38 ++r.first;
39 assert(*r.first == 50);
40 ++r.first;
41 assert(*r.first == 50);
42 }
43#if TEST_STD_VER >= 11
44 {
45 typedef std::unordered_multiset<int, std::hash<int>, std::equal_to<int>, min_allocator<int>> C;
46 typedef C::const_iterator I;
47 typedef int P;
48 P a[] = {P(10), P(20), P(30), P(40), P(50), P(50), P(50), P(60), P(70), P(80)};
49 const C c(std::begin(a), std::end(a));
50 std::pair<I, I> r = c.equal_range(30);
51 assert(std::distance(r.first, r.second) == 1);
52 assert(*r.first == 30);
53 r = c.equal_range(5);
54 assert(std::distance(r.first, r.second) == 0);
55 r = c.equal_range(50);
56 assert(std::distance(r.first, r.second) == 3);
57 assert(*r.first == 50);
58 ++r.first;
59 assert(*r.first == 50);
60 ++r.first;
61 assert(*r.first == 50);
62 }
63#endif
64
65 return 0;
66}
67

source code of libcxx/test/std/containers/unord/unord.multiset/equal_range_const.pass.cpp