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 // class unordered_map
12
13 // size_type max_size() const;
14
15 #include <cassert>
16 #include <limits>
17 #include <type_traits>
18 #include <unordered_map>
19
20 #include "test_allocator.h"
21 #include "test_macros.h"
22
main(int,char **)23 int main(int, char**)
24 {
25 typedef std::pair<const int, int> KV;
26 {
27 typedef limited_allocator<KV, 10> A;
28 typedef std::unordered_map<int, int, std::hash<int>, std::equal_to<int>, A>
29 C;
30 C c;
31 assert(c.max_size() <= 10);
32 LIBCPP_ASSERT(c.max_size() == 10);
33 }
34 {
35 typedef limited_allocator<KV, (std::size_t)-1> A;
36 typedef std::unordered_map<int, int, std::hash<int>, std::equal_to<int>, A>
37 C;
38 const C::size_type max_dist =
39 static_cast<C::size_type>(std::numeric_limits<C::difference_type>::max());
40 C c;
41 assert(c.max_size() <= max_dist);
42 LIBCPP_ASSERT(c.max_size() == max_dist);
43 }
44 {
45 typedef std::unordered_map<char, int> C;
46 const C::size_type max_dist =
47 static_cast<C::size_type>(std::numeric_limits<C::difference_type>::max());
48 C c;
49 assert(c.max_size() <= max_dist);
50 assert(c.max_size() <= alloc_max_size(c.get_allocator()));
51 }
52
53 return 0;
54 }
55