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Vendor import of libc++ trunk r256633:
[FreeBSD/FreeBSD.git] / test / std / containers / unord / unord.map / bucket_count.pass.cpp
1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <unordered_map>
11
12 // template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
13 //           class Alloc = allocator<pair<const Key, T>>>
14 // class unordered_map
15
16 // size_type bucket_count() const;
17
18 #include <unordered_map>
19 #include <string>
20 #include <cassert>
21
22 #include "test_macros.h"
23 #include "min_allocator.h"
24
25 int main()
26 {
27     {
28         typedef std::unordered_map<int, std::string> C;
29         const C c;
30         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() >= 11);
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         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() >= 11);
73     }
74 #endif
75 }