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