init_size_hash_equal.pass.cpp revision f836d531b4146465342939fe32ae47d157ee07b2 
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
24#include "../../../test_compare.h"
25#include "../../../test_hash.h"
26#include "../../../test_allocator.h"
27
28int main()
29{
30#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
31    {
32        typedef std::unordered_map<int, std::string,
33                                   test_hash<std::hash<int> >,
34                                   test_compare<std::equal_to<int> >,
35                                   test_allocator<std::pair<const int, std::string> >
36                                   > C;
37        typedef std::pair<int, std::string> P;
38        C c({
39                P(1, "one"),
40                P(2, "two"),
41                P(3, "three"),
42                P(4, "four"),
43                P(1, "four"),
44                P(2, "four"),
45            },
46            7,
47            test_hash<std::hash<int> >(8),
48            test_compare<std::equal_to<int> >(9)
49           );
50        assert(c.bucket_count() == 7);
51        assert(c.size() == 4);
52        assert(c.at(1) == "one");
53        assert(c.at(2) == "two");
54        assert(c.at(3) == "three");
55        assert(c.at(4) == "four");
56        assert(c.hash_function() == test_hash<std::hash<int> >(8));
57        assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
58        assert(c.get_allocator() ==
59               (test_allocator<std::pair<const int, std::string> >()));
60        assert(!c.empty());
61        assert(std::distance(c.begin(), c.end()) == c.size());
62        assert(std::distance(c.cbegin(), c.cend()) == c.size());
63        assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
64        assert(c.max_load_factor() == 1);
65    }
66#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
67}
68