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_map>
12
13// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
14// class Alloc = allocator<pair<const Key, T>>>
15// class unordered_map
16
17// unordered_map& operator=(initializer_list<value_type> il);
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 "min_allocator.h"
30
31int main(int, char**)
32{
33 {
34 typedef std::allocator<std::pair<const int, std::string> > A;
35 typedef std::unordered_map<int, std::string,
36 test_hash<int>,
37 test_equal_to<int>,
38 A
39 > C;
40 typedef std::pair<int, std::string> P;
41 C c = {
42 P(4, "four"),
43 P(1, "four"),
44 P(2, "four"),
45 };
46 c = {
47 P(1, "one"),
48 P(2, "two"),
49 P(3, "three"),
50 P(4, "four"),
51 P(1, "four"),
52 P(2, "four"),
53 };
54 assert(c.bucket_count() >= 5);
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(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 {
66 typedef min_allocator<std::pair<const int, std::string> > A;
67 typedef std::unordered_map<int, std::string,
68 test_hash<int>,
69 test_equal_to<int>,
70 A
71 > C;
72 typedef std::pair<int, std::string> P;
73 C c = {
74 P(4, "four"),
75 P(1, "four"),
76 P(2, "four"),
77 };
78 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 assert(c.bucket_count() >= 5);
87 assert(c.size() == 4);
88 assert(c.at(1) == "one");
89 assert(c.at(2) == "two");
90 assert(c.at(3) == "three");
91 assert(c.at(4) == "four");
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(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

source code of libcxx/test/std/containers/unord/unord.map/unord.map.cnstr/assign_init.pass.cpp