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_map>
10
11// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
12// class Alloc = allocator<pair<const Key, T>>>
13// class unordered_map
14
15// unordered_map(size_type n);
16
17#include <unordered_map>
18#include <cassert>
19
20#include "test_macros.h"
21#include "../../../NotConstructible.h"
22#include "../../../test_compare.h"
23#include "../../../test_hash.h"
24#include "test_allocator.h"
25#include "min_allocator.h"
26
27int main(int, char**) {
28 {
29 typedef std::unordered_map<NotConstructible,
30 NotConstructible,
31 test_hash<NotConstructible>,
32 test_equal_to<NotConstructible>,
33 test_allocator<std::pair<const NotConstructible, NotConstructible> > >
34 C;
35 C c(7);
36 LIBCPP_ASSERT(c.bucket_count() == 7);
37 assert(c.hash_function() == test_hash<NotConstructible>());
38 assert(c.key_eq() == test_equal_to<NotConstructible>());
39 assert(c.get_allocator() == (test_allocator<std::pair<const NotConstructible, NotConstructible> >()));
40 assert(c.size() == 0);
41 assert(c.empty());
42 assert(std::distance(c.begin(), c.end()) == 0);
43 assert(c.load_factor() == 0);
44 assert(c.max_load_factor() == 1);
45 }
46#if TEST_STD_VER >= 11
47 {
48 typedef std::unordered_map<NotConstructible,
49 NotConstructible,
50 test_hash<NotConstructible>,
51 test_equal_to<NotConstructible>,
52 min_allocator<std::pair<const NotConstructible, NotConstructible> > >
53 C;
54 C c(7);
55 LIBCPP_ASSERT(c.bucket_count() == 7);
56 assert(c.hash_function() == test_hash<NotConstructible>());
57 assert(c.key_eq() == test_equal_to<NotConstructible>());
58 assert(c.get_allocator() == (min_allocator<std::pair<const NotConstructible, NotConstructible> >()));
59 assert(c.size() == 0);
60 assert(c.empty());
61 assert(std::distance(c.begin(), c.end()) == 0);
62 assert(c.load_factor() == 0);
63 assert(c.max_load_factor() == 1);
64 }
65#endif
66
67 return 0;
68}
69

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