test/std/containers/unord/unord.map/unord.map.cnstr/init.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);
  17
  18 #include <unordered_map>
  19 #include <string>
  20 #include <cassert>
  21 #include <cfloat>
  22 #include <cstddef>
  23
  24 #include "test_macros.h"
  25 #include "../../../test_compare.h"
  26 #include "../../../test_hash.h"
  27 #include "test_allocator.h"
  28 #include "min_allocator.h"
  29
  30 int main()
  31 {
  32 #ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
  33     {
  34         typedef std::unordered_map<int, std::string,
  35                                    test_hash<std::hash<int> >,
  36                                    test_compare<std::equal_to<int> >,
  37                                    test_allocator<std::pair<const int, std::string> >
  38                                    > C;
  39         typedef std::pair<int, std::string> P;
  40         C c = {
  41                 P(1, "one"),
  42                 P(2, "two"),
  43                 P(3, "three"),
  44                 P(4, "four"),
  45                 P(1, "four"),
  46                 P(2, "four"),
  47               };
  48         assert(c.bucket_count() >= 5);
  49         assert(c.size() == 4);
  50         assert(c.at(1) == "one");
  51         assert(c.at(2) == "two");
  52         assert(c.at(3) == "three");
  53         assert(c.at(4) == "four");
  54         assert(c.hash_function() == test_hash<std::hash<int> >());
  55         assert(c.key_eq() == test_compare<std::equal_to<int> >());
  56         assert(c.get_allocator() ==
  57                (test_allocator<std::pair<const int, std::string> >()));
  58         assert(!c.empty());
  59         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
  60         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
  61         assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
  62         assert(c.max_load_factor() == 1);
  63     }
  64 #if TEST_STD_VER >= 11
  65     {
  66         typedef std::unordered_map<int, std::string,
  67                                    test_hash<std::hash<int> >,
  68                                    test_compare<std::equal_to<int> >,
  69                                    min_allocator<std::pair<const int, std::string> >
  70                                    > C;
  71         typedef std::pair<int, std::string> P;
  72         C c = {
  73                 P(1, "one"),
  74                 P(2, "two"),
  75                 P(3, "three"),
  76                 P(4, "four"),
  77                 P(1, "four"),
  78                 P(2, "four"),
  79               };
  80         assert(c.bucket_count() >= 5);
  81         assert(c.size() == 4);
  82         assert(c.at(1) == "one");
  83         assert(c.at(2) == "two");
  84         assert(c.at(3) == "three");
  85         assert(c.at(4) == "four");
  86         assert(c.hash_function() == test_hash<std::hash<int> >());
  87         assert(c.key_eq() == test_compare<std::equal_to<int> >());
  88         assert(c.get_allocator() ==
  89                (min_allocator<std::pair<const int, std::string> >()));
  90         assert(!c.empty());
  91         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
  92         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
  93         assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
  94         assert(c.max_load_factor() == 1);
  95     }
  96 #if TEST_STD_VER > 11
  97     {
  98         typedef std::pair<int, std::string> P;
  99         typedef test_allocator<std::pair<const int, std::string>> A;
 100         typedef test_hash<std::hash<int>> HF;
 101         typedef test_compare<std::equal_to<int>> Comp;
 102         typedef std::unordered_map<int, std::string, HF, Comp, A> C;
 103
 104         A a(42);
 105         C c ( {
 106                 P(1, "one"),
 107                 P(2, "two"),
 108                 P(3, "three"),
 109                 P(4, "four"),
 110                 P(1, "four"),
 111                 P(2, "four"),
 112               }, 12, a);
 113         assert(c.bucket_count() >= 12);
 114         assert(c.size() == 4);
 115         assert(c.at(1) == "one");
 116         assert(c.at(2) == "two");
 117         assert(c.at(3) == "three");
 118         assert(c.at(4) == "four");
 119         assert(c.hash_function() == test_hash<std::hash<int> >());
 120         assert(c.key_eq() == test_compare<std::equal_to<int> >());
 121         assert(c.get_allocator() == a);
 122         assert(!c.empty());
 123         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
 124         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
 125         assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
 126         assert(c.max_load_factor() == 1);
 127     }
 128     {
 129         typedef std::pair<int, std::string> P;
 130         typedef test_allocator<std::pair<const int, std::string>> A;
 131         typedef test_hash<std::hash<int>> HF;
 132         typedef test_compare<std::equal_to<int>> Comp;
 133         typedef std::unordered_map<int, std::string, HF, Comp, A> C;
 134
 135         HF hf(42);
 136         A a(43);
 137         C c ( {
 138                 P(1, "one"),
 139                 P(2, "two"),
 140                 P(3, "three"),
 141                 P(4, "four"),
 142                 P(1, "four"),
 143                 P(2, "four"),
 144               }, 12, hf, a);
 145         assert(c.bucket_count() >= 12);
 146         assert(c.size() == 4);
 147         assert(c.at(1) == "one");
 148         assert(c.at(2) == "two");
 149         assert(c.at(3) == "three");
 150         assert(c.at(4) == "four");
 151         assert(c.hash_function() == hf);
 152         assert(!(c.hash_function() == test_hash<std::hash<int> >()));
 153         assert(c.key_eq() == test_compare<std::equal_to<int> >());
 154         assert(c.get_allocator() == a);
 155         assert(!c.empty());
 156         assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
 157         assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
 158         assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
 159         assert(c.max_load_factor() == 1);
 160     }
 161 #endif
 162 #endif
 163 #endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 164 }