bucket_size.pass.cpp revision 7a6b7cedcb3359ad7d77e355b02ab982d9d2b25b 
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_size(size_type n) 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 std::pair<int, std::string> P;
29        P a[] =
30        {
31            P(1, "one"),
32            P(2, "two"),
33            P(3, "three"),
34            P(4, "four"),
35            P(1, "four"),
36            P(2, "four"),
37        };
38        const C c(std::begin(a), std::end(a));
39        assert(c.bucket_count() >= 5);
40        assert(c.bucket_size(0) == 0);
41        assert(c.bucket_size(1) == 1);
42        assert(c.bucket_size(2) == 1);
43        assert(c.bucket_size(3) == 1);
44        assert(c.bucket_size(4) == 1);
45    }
46#if __cplusplus >= 201103L
47    {
48        typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
49                            min_allocator<std::pair<const int, std::string>>> C;
50        typedef std::pair<int, std::string> P;
51        P a[] =
52        {
53            P(1, "one"),
54            P(2, "two"),
55            P(3, "three"),
56            P(4, "four"),
57            P(1, "four"),
58            P(2, "four"),
59        };
60        const C c(std::begin(a), std::end(a));
61        assert(c.bucket_count() >= 5);
62        assert(c.bucket_size(0) == 0);
63        assert(c.bucket_size(1) == 1);
64        assert(c.bucket_size(2) == 1);
65        assert(c.bucket_size(3) == 1);
66        assert(c.bucket_size(4) == 1);
67    }
68#endif
69}
70