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_map
14
15// size_type bucket_count() const;
16
17#include <unordered_map>
18#include <string>
19#include <cassert>
20#include <iterator>
21
22#include "test_macros.h"
23#include "min_allocator.h"
24
25int main(int, char**) {
26 {
27 typedef std::unordered_map<int, std::string> C;
28 const C c;
29 LIBCPP_ASSERT(c.bucket_count() == 0);
30 }
31 {
32 typedef std::unordered_map<int, std::string> C;
33 typedef std::pair<int, std::string> P;
34 P a[] = {
35 P(10, "ten"),
36 P(20, "twenty"),
37 P(30, "thirty"),
38 P(40, "forty"),
39 P(50, "fifty"),
40 P(60, "sixty"),
41 P(70, "seventy"),
42 P(80, "eighty"),
43 };
44 const C c(std::begin(arr&: a), std::end(arr&: a));
45 assert(c.bucket_count() >= 8);
46 }
47#if TEST_STD_VER >= 11
48 {
49 typedef std::unordered_map<int,
50 std::string,
51 std::hash<int>,
52 std::equal_to<int>,
53 min_allocator<std::pair<const int, std::string>>>
54 C;
55 const C c;
56 LIBCPP_ASSERT(c.bucket_count() == 0);
57 }
58 {
59 typedef std::unordered_map<int,
60 std::string,
61 std::hash<int>,
62 std::equal_to<int>,
63 min_allocator<std::pair<const int, std::string>>>
64 C;
65 typedef std::pair<int, std::string> P;
66 P a[] = {
67 P(10, "ten"),
68 P(20, "twenty"),
69 P(30, "thirty"),
70 P(40, "forty"),
71 P(50, "fifty"),
72 P(60, "sixty"),
73 P(70, "seventy"),
74 P(80, "eighty"),
75 };
76 const C c(std::begin(a), std::end(a));
77 assert(c.bucket_count() >= 8);
78 }
79#endif
80
81 return 0;
82}
83

source code of libcxx/test/std/containers/unord/unord.map/bucket_count.pass.cpp