test/std/containers/unord/unord.map/unord.map.cnstr/init_size_hash_equal.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_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 #include <cstddef>
  25
  26 #include "test_macros.h"
  27 #include "../../../test_compare.h"
  28 #include "../../../test_hash.h"
  29 #include "test_allocator.h"
  30 #include "min_allocator.h"
  31
  32 int main()
  33 {
  34 #ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
  35     {
  36         typedef std::unordered_map<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         C c({
  43                 P(1, "one"),
  44                 P(2, "two"),
  45                 P(3, "three"),
  46                 P(4, "four"),
  47                 P(1, "four"),
  48                 P(2, "four"),
  49             },
  50             7,
  51             test_hash<std::hash<int> >(8),
  52             test_compare<std::equal_to<int> >(9)
  53            );
  54         LIBCPP_ASSERT(c.bucket_count() == 7);
  55         assert(c.size() == 4);
  56         assert(c.at(1) == "one");
  57         assert(c.at(2) == "two");
  58         assert(c.at(3) == "three");
  59         assert(c.at(4) == "four");
  60         assert(c.hash_function() == test_hash<std::hash<int> >(8));
  61         assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
  62         assert(c.get_allocator() ==
  63                (test_allocator<std::pair<const int, std::string> >()));
  64         assert(!c.empty());
  65         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
  66         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
  67         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
  68         assert(c.max_load_factor() == 1);
  69     }
  70 #if TEST_STD_VER >= 11
  71     {
  72         typedef std::unordered_map<int, std::string,
  73                                    test_hash<std::hash<int> >,
  74                                    test_compare<std::equal_to<int> >,
  75                                    min_allocator<std::pair<const int, std::string> >
  76                                    > C;
  77         typedef std::pair<int, std::string> P;
  78         C c({
  79                 P(1, "one"),
  80                 P(2, "two"),
  81                 P(3, "three"),
  82                 P(4, "four"),
  83                 P(1, "four"),
  84                 P(2, "four"),
  85             },
  86             7,
  87             test_hash<std::hash<int> >(8),
  88             test_compare<std::equal_to<int> >(9)
  89            );
  90         LIBCPP_ASSERT(c.bucket_count() == 7);
  91         assert(c.size() == 4);
  92         assert(c.at(1) == "one");
  93         assert(c.at(2) == "two");
  94         assert(c.at(3) == "three");
  95         assert(c.at(4) == "four");
  96         assert(c.hash_function() == test_hash<std::hash<int> >(8));
  97         assert(c.key_eq() == test_compare<std::equal_to<int> >(9));
  98         assert(c.get_allocator() ==
  99                (min_allocator<std::pair<const int, std::string> >()));
 100         assert(!c.empty());
 101         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
 102         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
 103         assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
 104         assert(c.max_load_factor() == 1);
 105     }
 106 #endif
 107 #endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 108 }