test/std/containers/unord/unord.multimap/unord.multimap.cnstr/init_size.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 // unordered_multimap(initializer_list<value_type> il, size_type n);
  17
  18 #include <unordered_map>
  19 #include <string>
  20 #include <cassert>
  21 #include <cfloat>
  22 #include <cmath>
  23 #include <cstddef>
  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
  31 int main()
  32 {
  33 #ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
  34     {
  35         typedef std::unordered_multimap<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            );
  51         LIBCPP_ASSERT(c.bucket_count() == 7);
  52         assert(c.size() == 6);
  53         typedef std::pair<C::const_iterator, C::const_iterator> Eq;
  54         Eq eq = c.equal_range(1);
  55         assert(std::distance(eq.first, eq.second) == 2);
  56         C::const_iterator i = eq.first;
  57         assert(i->first == 1);
  58         assert(i->second == "one");
  59         ++i;
  60         assert(i->first == 1);
  61         assert(i->second == "four");
  62         eq = c.equal_range(2);
  63         assert(std::distance(eq.first, eq.second) == 2);
  64         i = eq.first;
  65         assert(i->first == 2);
  66         assert(i->second == "two");
  67         ++i;
  68         assert(i->first == 2);
  69         assert(i->second == "four");
  70
  71         eq = c.equal_range(3);
  72         assert(std::distance(eq.first, eq.second) == 1);
  73         i = eq.first;
  74         assert(i->first == 3);
  75         assert(i->second == "three");
  76         eq = c.equal_range(4);
  77         assert(std::distance(eq.first, eq.second) == 1);
  78         i = eq.first;
  79         assert(i->first == 4);
  80         assert(i->second == "four");
  81         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
  82         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
  83         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
  84         assert(c.max_load_factor() == 1);
  85         assert(c.hash_function() == test_hash<std::hash<int> >());
  86         assert(c.key_eq() == test_compare<std::equal_to<int> >());
  87         assert((c.get_allocator() == test_allocator<std::pair<const int, std::string> >()));
  88     }
  89 #if TEST_STD_VER >= 11
  90     {
  91         typedef std::unordered_multimap<int, std::string,
  92                                    test_hash<std::hash<int> >,
  93                                    test_compare<std::equal_to<int> >,
  94                                    min_allocator<std::pair<const int, std::string> >
  95                                    > C;
  96         typedef std::pair<int, std::string> P;
  97         C c({
  98                 P(1, "one"),
  99                 P(2, "two"),
 100                 P(3, "three"),
 101                 P(4, "four"),
 102                 P(1, "four"),
 103                 P(2, "four"),
 104             },
 105             7
 106            );
 107         LIBCPP_ASSERT(c.bucket_count() == 7);
 108         assert(c.size() == 6);
 109         typedef std::pair<C::const_iterator, C::const_iterator> Eq;
 110         Eq eq = c.equal_range(1);
 111         assert(std::distance(eq.first, eq.second) == 2);
 112         C::const_iterator i = eq.first;
 113         assert(i->first == 1);
 114         assert(i->second == "one");
 115         ++i;
 116         assert(i->first == 1);
 117         assert(i->second == "four");
 118         eq = c.equal_range(2);
 119         assert(std::distance(eq.first, eq.second) == 2);
 120         i = eq.first;
 121         assert(i->first == 2);
 122         assert(i->second == "two");
 123         ++i;
 124         assert(i->first == 2);
 125         assert(i->second == "four");
 126
 127         eq = c.equal_range(3);
 128         assert(std::distance(eq.first, eq.second) == 1);
 129         i = eq.first;
 130         assert(i->first == 3);
 131         assert(i->second == "three");
 132         eq = c.equal_range(4);
 133         assert(std::distance(eq.first, eq.second) == 1);
 134         i = eq.first;
 135         assert(i->first == 4);
 136         assert(i->second == "four");
 137         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
 138         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
 139         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
 140         assert(c.max_load_factor() == 1);
 141         assert(c.hash_function() == test_hash<std::hash<int> >());
 142         assert(c.key_eq() == test_compare<std::equal_to<int> >());
 143         assert((c.get_allocator() == min_allocator<std::pair<const int, std::string> >()));
 144     }
 145 #endif
 146 #endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 147 }