test/std/containers/unord/unord.multimap/unord.multimap.cnstr/range_size_hash.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_multimap
  15
  16 // template <class InputIterator>
  17 //     unordered_multimap(InputIterator first, InputIterator last, size_type n,
  18 //                   const hasher& hf);
  19
  20 #include <unordered_map>
  21 #include <string>
  22 #include <cassert>
  23 #include <cfloat>
  24 #include <cmath>
  25
  26 #include "test_iterators.h"
  27 #include "../../../NotConstructible.h"
  28 #include "../../../test_compare.h"
  29 #include "../../../test_hash.h"
  30 #include "test_allocator.h"
  31 #include "min_allocator.h"
  32
  33 int main()
  34 {
  35     {
  36         typedef std::unordered_multimap<int, std::string,
  37                                    test_hash<std::hash<int> >,
  38                                    test_compare<std::equal_to<int> >,
  39                                    test_allocator<std::pair<const int, std::string> >
  40                                    > C;
  41         typedef std::pair<int, std::string> P;
  42         P a[] =
  43         {
  44             P(1, "one"),
  45             P(2, "two"),
  46             P(3, "three"),
  47             P(4, "four"),
  48             P(1, "four"),
  49             P(2, "four"),
  50         };
  51         C c(input_iterator<P*>(a), input_iterator<P*>(a + sizeof(a)/sizeof(a[0])),
  52             7,
  53             test_hash<std::hash<int> >(8)
  54            );
  55         assert(c.bucket_count() == 7);
  56         assert(c.size() == 6);
  57         typedef std::pair<C::const_iterator, C::const_iterator> Eq;
  58         Eq eq = c.equal_range(1);
  59         assert(std::distance(eq.first, eq.second) == 2);
  60         C::const_iterator i = eq.first;
  61         assert(i->first == 1);
  62         assert(i->second == "one");
  63         ++i;
  64         assert(i->first == 1);
  65         assert(i->second == "four");
  66         eq = c.equal_range(2);
  67         assert(std::distance(eq.first, eq.second) == 2);
  68         i = eq.first;
  69         assert(i->first == 2);
  70         assert(i->second == "two");
  71         ++i;
  72         assert(i->first == 2);
  73         assert(i->second == "four");
  74
  75         eq = c.equal_range(3);
  76         assert(std::distance(eq.first, eq.second) == 1);
  77         i = eq.first;
  78         assert(i->first == 3);
  79         assert(i->second == "three");
  80         eq = c.equal_range(4);
  81         assert(std::distance(eq.first, eq.second) == 1);
  82         i = eq.first;
  83         assert(i->first == 4);
  84         assert(i->second == "four");
  85         assert(std::distance(c.begin(), c.end()) == c.size());
  86         assert(std::distance(c.cbegin(), c.cend()) == c.size());
  87         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
  88         assert(c.max_load_factor() == 1);
  89         assert(c.hash_function() == test_hash<std::hash<int> >(8));
  90         assert(c.key_eq() == test_compare<std::equal_to<int> >());
  91         assert((c.get_allocator() == test_allocator<std::pair<const int, std::string> >()));
  92     }
  93 #if TEST_STD_VER >= 11
  94     {
  95         typedef std::unordered_multimap<int, std::string,
  96                                    test_hash<std::hash<int> >,
  97                                    test_compare<std::equal_to<int> >,
  98                                    min_allocator<std::pair<const int, std::string> >
  99                                    > C;
 100         typedef std::pair<int, std::string> P;
 101         P a[] =
 102         {
 103             P(1, "one"),
 104             P(2, "two"),
 105             P(3, "three"),
 106             P(4, "four"),
 107             P(1, "four"),
 108             P(2, "four"),
 109         };
 110         C c(input_iterator<P*>(a), input_iterator<P*>(a + sizeof(a)/sizeof(a[0])),
 111             7,
 112             test_hash<std::hash<int> >(8)
 113            );
 114         assert(c.bucket_count() == 7);
 115         assert(c.size() == 6);
 116         typedef std::pair<C::const_iterator, C::const_iterator> Eq;
 117         Eq eq = c.equal_range(1);
 118         assert(std::distance(eq.first, eq.second) == 2);
 119         C::const_iterator i = eq.first;
 120         assert(i->first == 1);
 121         assert(i->second == "one");
 122         ++i;
 123         assert(i->first == 1);
 124         assert(i->second == "four");
 125         eq = c.equal_range(2);
 126         assert(std::distance(eq.first, eq.second) == 2);
 127         i = eq.first;
 128         assert(i->first == 2);
 129         assert(i->second == "two");
 130         ++i;
 131         assert(i->first == 2);
 132         assert(i->second == "four");
 133
 134         eq = c.equal_range(3);
 135         assert(std::distance(eq.first, eq.second) == 1);
 136         i = eq.first;
 137         assert(i->first == 3);
 138         assert(i->second == "three");
 139         eq = c.equal_range(4);
 140         assert(std::distance(eq.first, eq.second) == 1);
 141         i = eq.first;
 142         assert(i->first == 4);
 143         assert(i->second == "four");
 144         assert(std::distance(c.begin(), c.end()) == c.size());
 145         assert(std::distance(c.cbegin(), c.cend()) == c.size());
 146         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
 147         assert(c.max_load_factor() == 1);
 148         assert(c.hash_function() == test_hash<std::hash<int> >(8));
 149         assert(c.key_eq() == test_compare<std::equal_to<int> >());
 150         assert((c.get_allocator() == min_allocator<std::pair<const int, std::string> >()));
 151     }
 152 #endif
 153 }