1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <unordered_set>
10
11// template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
12// class Alloc = allocator<Value>>
13// class unordered_set
14
15// template <class InputIterator>
16// unordered_set(InputIterator first, InputIterator last);
17
18#include <unordered_set>
19#include <cassert>
20#include <cfloat>
21#include <cmath>
22#include <cstddef>
23
24#include "test_macros.h"
25#include "test_iterators.h"
26#include "../../../test_compare.h"
27#include "../../../test_hash.h"
28#include "test_allocator.h"
29#include "min_allocator.h"
30
31int main(int, char**)
32{
33 {
34 typedef std::unordered_set<int,
35 test_hash<int>,
36 test_equal_to<int>,
37 test_allocator<int>
38 > C;
39 typedef int P;
40 P a[] =
41 {
42 P(1),
43 P(2),
44 P(3),
45 P(4),
46 P(1),
47 P(2)
48 };
49 C c(cpp17_input_iterator<P*>(a), cpp17_input_iterator<P*>(a + sizeof(a)/sizeof(a[0])));
50 assert(c.bucket_count() >= 5);
51 assert(c.size() == 4);
52 assert(c.count(1) == 1);
53 assert(c.count(2) == 1);
54 assert(c.count(3) == 1);
55 assert(c.count(4) == 1);
56 assert(c.hash_function() == test_hash<int>());
57 assert(c.key_eq() == test_equal_to<int>());
58 assert(c.get_allocator() == test_allocator<int>());
59 assert(!c.empty());
60 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
61 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
62 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
63 assert(c.max_load_factor() == 1);
64 }
65#if TEST_STD_VER >= 11
66 {
67 typedef std::unordered_set<int,
68 test_hash<int>,
69 test_equal_to<int>,
70 min_allocator<int>
71 > C;
72 typedef int P;
73 P a[] =
74 {
75 P(1),
76 P(2),
77 P(3),
78 P(4),
79 P(1),
80 P(2)
81 };
82 C c(cpp17_input_iterator<P*>(a), cpp17_input_iterator<P*>(a + sizeof(a)/sizeof(a[0])));
83 assert(c.bucket_count() >= 5);
84 assert(c.size() == 4);
85 assert(c.count(1) == 1);
86 assert(c.count(2) == 1);
87 assert(c.count(3) == 1);
88 assert(c.count(4) == 1);
89 assert(c.hash_function() == test_hash<int>());
90 assert(c.key_eq() == test_equal_to<int>());
91 assert(c.get_allocator() == min_allocator<int>());
92 assert(!c.empty());
93 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
94 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
95 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
96 assert(c.max_load_factor() == 1);
97 }
98#if TEST_STD_VER > 11
99 {
100 typedef int T;
101 typedef test_hash<T> HF;
102 typedef test_equal_to<T> Comp;
103 typedef test_allocator<T> A;
104 typedef std::unordered_set<T, HF, Comp, A> C;
105 T arr[] =
106 {
107 T(1),
108 T(2),
109 T(3),
110 T(4),
111 T(1),
112 T(2)
113 };
114 A a(42);
115 C c(cpp17_input_iterator<T*>(arr), cpp17_input_iterator<T*>(arr + sizeof(arr)/sizeof(arr[0])), 12, a);
116 assert(c.bucket_count() >= 12);
117 assert(c.size() == 4);
118 assert(c.count(1) == 1);
119 assert(c.count(2) == 1);
120 assert(c.count(3) == 1);
121 assert(c.count(4) == 1);
122 assert(c.hash_function() == HF());
123 assert(c.key_eq() == Comp());
124 assert(c.get_allocator() == a);
125 assert(!(c.get_allocator() == A()));
126 assert(!c.empty());
127 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
128 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
129 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
130 assert(c.max_load_factor() == 1);
131 }
132 {
133 typedef int T;
134 typedef test_hash<T> HF;
135 typedef test_equal_to<T> Comp;
136 typedef test_allocator<T> A;
137 typedef std::unordered_set<T, HF, Comp, A> C;
138 T arr[] =
139 {
140 T(1),
141 T(2),
142 T(3),
143 T(4),
144 T(1),
145 T(2)
146 };
147 HF hf(43);
148 A a(42);
149 C c(cpp17_input_iterator<T*>(arr), cpp17_input_iterator<T*>(arr + sizeof(arr)/sizeof(arr[0])), 16, hf, a);
150 assert(c.bucket_count() >= 16);
151 assert(c.size() == 4);
152 assert(c.count(1) == 1);
153 assert(c.count(2) == 1);
154 assert(c.count(3) == 1);
155 assert(c.count(4) == 1);
156 assert(c.hash_function() == hf);
157 assert(!(c.hash_function() == HF()));
158 assert(c.key_eq() == Comp());
159 assert(c.get_allocator() == a);
160 assert(!(c.get_allocator() == A()));
161 assert(!c.empty());
162 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
163 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
164 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
165 assert(c.max_load_factor() == 1);
166 }
167
168#endif
169#endif
170
171 return 0;
172}
173

source code of libcxx/test/std/containers/unord/unord.set/unord.set.cnstr/iter_iter.pass.cpp