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 {
26 typedef std::unordered_multiset<int> C;
27 typedef C::const_iterator I;
28 typedef int P;
29 P a[] =
30 {
31 P(10),
32 P(20),
33 P(30),
34 P(40),
35 P(50),
36 P(50),
37 P(50),
38 P(60),
39 P(70),
40 P(80)
41 };
42 const C c(std::begin(arr&: a), std::end(arr&: a));
43 std::pair<I, I> r = c.equal_range(x: 30);
44 assert(std::distance(r.first, r.second) == 1);
45 assert(*r.first == 30);
46 r = c.equal_range(x: 5);
47 assert(std::distance(r.first, r.second) == 0);
48 r = c.equal_range(x: 50);
49 assert(std::distance(r.first, r.second) == 3);
50 assert(*r.first == 50);
51 ++r.first;
52 assert(*r.first == 50);
53 ++r.first;
54 assert(*r.first == 50);
55 }
56#if TEST_STD_VER >= 11
57 {
58 typedef std::unordered_multiset<int, std::hash<int>,
59 std::equal_to<int>, min_allocator<int>> C;
60 typedef C::const_iterator I;
61 typedef int P;
62 P a[] =
63 {
64 P(10),
65 P(20),
66 P(30),
67 P(40),
68 P(50),
69 P(50),
70 P(50),
71 P(60),
72 P(70),
73 P(80)
74 };
75 const C c(std::begin(a), std::end(a));
76 std::pair<I, I> r = c.equal_range(30);
77 assert(std::distance(r.first, r.second) == 1);
78 assert(*r.first == 30);
79 r = c.equal_range(5);
80 assert(std::distance(r.first, r.second) == 0);
81 r = c.equal_range(50);
82 assert(std::distance(r.first, r.second) == 3);
83 assert(*r.first == 50);
84 ++r.first;
85 assert(*r.first == 50);
86 ++r.first;
87 assert(*r.first == 50);
88 }
89#endif
90
91 return 0;
92}
93

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