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 // unordered_set(const unordered_set& u, const allocator_type& a);
16
17 #include <unordered_set>
18 #include <cassert>
19 #include <cfloat>
20 #include <cmath>
21 #include <cstddef>
22
23 #include "test_macros.h"
24 #include "../../../test_compare.h"
25 #include "../../../test_hash.h"
26 #include "test_allocator.h"
27 #include "min_allocator.h"
28
main(int,char **)29 int main(int, char**)
30 {
31 {
32 typedef std::unordered_set<int,
33 test_hash<int>,
34 test_equal_to<int>,
35 test_allocator<int>
36 > C;
37 typedef int P;
38 P a[] =
39 {
40 P(1),
41 P(2),
42 P(3),
43 P(4),
44 P(1),
45 P(2)
46 };
47 C c0(a, a + sizeof(a)/sizeof(a[0]),
48 7,
49 test_hash<int>(8),
50 test_equal_to<int>(9),
51 test_allocator<int>(10)
52 );
53 C c(c0, test_allocator<int>(5));
54 LIBCPP_ASSERT(c.bucket_count() == 7);
55 assert(c.size() == 4);
56 assert(c.count(1) == 1);
57 assert(c.count(2) == 1);
58 assert(c.count(3) == 1);
59 assert(c.count(4) == 1);
60 assert(c.hash_function() == test_hash<int>(8));
61 assert(c.key_eq() == test_equal_to<int>(9));
62 assert(c.get_allocator() == test_allocator<int>(5));
63 assert(!c.empty());
64 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
65 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
66 assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
67 assert(c.max_load_factor() == 1);
68 }
69 #if TEST_STD_VER >= 11
70 {
71 typedef std::unordered_set<int,
72 test_hash<int>,
73 test_equal_to<int>,
74 min_allocator<int>
75 > C;
76 typedef int P;
77 P a[] =
78 {
79 P(1),
80 P(2),
81 P(3),
82 P(4),
83 P(1),
84 P(2)
85 };
86 C c0(a, a + sizeof(a)/sizeof(a[0]),
87 7,
88 test_hash<int>(8),
89 test_equal_to<int>(9),
90 min_allocator<int>()
91 );
92 C c(c0, min_allocator<int>());
93 LIBCPP_ASSERT(c.bucket_count() == 7);
94 assert(c.size() == 4);
95 assert(c.count(1) == 1);
96 assert(c.count(2) == 1);
97 assert(c.count(3) == 1);
98 assert(c.count(4) == 1);
99 assert(c.hash_function() == test_hash<int>(8));
100 assert(c.key_eq() == test_equal_to<int>(9));
101 assert(c.get_allocator() == min_allocator<int>());
102 assert(!c.empty());
103 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
104 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
105 assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
106 assert(c.max_load_factor() == 1);
107 }
108 #endif
109
110 return 0;
111 }
112