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 // UNSUPPORTED: c++03
10
11 // <unordered_set>
12
13 // template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
14 // class Alloc = allocator<Value>>
15 // class unordered_set
16
17 // unordered_set(initializer_list<value_type> il, size_type n);
18
19 #include <unordered_set>
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
main(int,char **)31 int 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 C c({
41 P(1),
42 P(2),
43 P(3),
44 P(4),
45 P(1),
46 P(2)
47 },
48 7
49 );
50 LIBCPP_ASSERT(c.bucket_count() == 7);
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(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
63 assert(c.max_load_factor() == 1);
64 }
65 {
66 typedef std::unordered_set<int,
67 test_hash<int>,
68 test_equal_to<int>,
69 min_allocator<int>
70 > C;
71 typedef int P;
72 C c({
73 P(1),
74 P(2),
75 P(3),
76 P(4),
77 P(1),
78 P(2)
79 },
80 7
81 );
82 LIBCPP_ASSERT(c.bucket_count() == 7);
83 assert(c.size() == 4);
84 assert(c.count(1) == 1);
85 assert(c.count(2) == 1);
86 assert(c.count(3) == 1);
87 assert(c.count(4) == 1);
88 assert(c.hash_function() == test_hash<int>());
89 assert(c.key_eq() == test_equal_to<int>());
90 assert(c.get_allocator() == min_allocator<int>());
91 assert(!c.empty());
92 assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
93 assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
94 assert(std::fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
95 assert(c.max_load_factor() == 1);
96 }
97
98 return 0;
99 }
100