bucket_count.pass.cpp revision 061d0cc4db18d17bf01ed14c5db0be098205bd47 
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 "min_allocator.h"
23
24int main()
25{
26    {
27        typedef std::unordered_map<int, std::string> C;
28        typedef C::const_iterator I;
29        typedef std::pair<int, std::string> P;
30        const C c;
31        assert(c.bucket_count() == 0);
32    }
33    {
34        typedef std::unordered_map<int, std::string> C;
35        typedef C::const_iterator I;
36        typedef std::pair<int, std::string> P;
37        P a[] =
38        {
39            P(10, "ten"),
40            P(20, "twenty"),
41            P(30, "thirty"),
42            P(40, "fourty"),
43            P(50, "fifty"),
44            P(60, "sixty"),
45            P(70, "seventy"),
46            P(80, "eighty"),
47        };
48        const C c(std::begin(a), std::end(a));
49        assert(c.bucket_count() >= 11);
50    }
51#if __cplusplus >= 201103L
52    {
53        typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
54                            min_allocator<std::pair<const int, std::string>>> C;
55        typedef C::const_iterator I;
56        typedef std::pair<int, std::string> P;
57        const C c;
58        assert(c.bucket_count() == 0);
59    }
60    {
61        typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
62                            min_allocator<std::pair<const int, std::string>>> C;
63        typedef C::const_iterator I;
64        typedef std::pair<int, std::string> P;
65        P a[] =
66        {
67            P(10, "ten"),
68            P(20, "twenty"),
69            P(30, "thirty"),
70            P(40, "fourty"),
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() >= 11);
78    }
79#endif
80}
81