init_size_hash_equal.pass.cpp revision 0809a7f62b7e43e2e5f3a31f66dd8cf097cfeb71 
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// unordered_map(initializer_list<value_type> il, size_type n,
17//               const hasher& hf, const key_equal& eql);
18
19#include <unordered_map>
20#include <string>
21#include <cassert>
22#include <cfloat>
23#include <cmath>
24
25#include "test_macros.h"
26#include "../../../test_compare.h"
27#include "../../../test_hash.h"
28#include "test_allocator.h"
29#include "min_allocator.h"
30
31int main()
32{
33#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
34    {
35        typedef std::unordered_map<int, std::string,
36                                   test_hash<std::hash<int> >,
37                                   test_compare<std::equal_to<int> >,
38                                   test_allocator<std::pair<const int, std::string> >
39                                   > C;
40        typedef std::pair<int, std::string> P;
41        C c({
42                P(1, "one"),
43                P(2, "two"),
44                P(3, "three"),
45                P(4, "four"),
46                P(1, "four"),
47                P(2, "four"),
48            },
49            7,
50            test_hash<std::hash<int> >(8),
51            test_compare<std::equal_to<int> >(9)
52           );
53        LIBCPP_ASSERT(c.bucket_count() == 7);
54        assert(c.size() == 4);
55        assert(c.at(1) == "one");
56        assert(c.at(2) == "two");
57        assert(c.at(3) == "three");
58        assert(c.at(4) == "four");
59        assert(c.hash_function() == test_hash<std::hash<int> >(8));
60        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
61        assert(c.get_allocator() ==
62               (test_allocator<std::pair<const int, std::string> >()));
63        assert(!c.empty());
64        assert(std::distance(c.begin(), c.end()) == c.size());
65        assert(std::distance(c.cbegin(), c.cend()) == c.size());
66        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
67        assert(c.max_load_factor() == 1);
68    }
69#if TEST_STD_VER >= 11
70    {
71        typedef std::unordered_map<int, std::string,
72                                   test_hash<std::hash<int> >,
73                                   test_compare<std::equal_to<int> >,
74                                   min_allocator<std::pair<const int, std::string> >
75                                   > C;
76        typedef std::pair<int, std::string> P;
77        C c({
78                P(1, "one"),
79                P(2, "two"),
80                P(3, "three"),
81                P(4, "four"),
82                P(1, "four"),
83                P(2, "four"),
84            },
85            7,
86            test_hash<std::hash<int> >(8),
87            test_compare<std::equal_to<int> >(9)
88           );
89        LIBCPP_ASSERT(c.bucket_count() == 7);
90        assert(c.size() == 4);
91        assert(c.at(1) == "one");
92        assert(c.at(2) == "two");
93        assert(c.at(3) == "three");
94        assert(c.at(4) == "four");
95        assert(c.hash_function() == test_hash<std::hash<int> >(8));
96        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
97        assert(c.get_allocator() ==
98               (min_allocator<std::pair<const int, std::string> >()));
99        assert(!c.empty());
100        assert(std::distance(c.begin(), c.end()) == c.size());
101        assert(std::distance(c.cbegin(), c.cend()) == c.size());
102        assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
103        assert(c.max_load_factor() == 1);
104    }
105#endif
106#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
107}
108