1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <unordered_map>
11
12 // template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
13 // class Alloc = allocator<pair<const Key, T>>>
14 // class unordered_multimap
15
16 // float load_factor() const
17
18 #include <unordered_map>
19 #include <string>
20 #include <cassert>
21 #include <cfloat>
22
23 #include "min_allocator.h"
24
main()25 int main()
26 {
27 {
28 typedef std::unordered_multimap<int, std::string> C;
29 typedef std::pair<int, std::string> P;
30 P a[] =
31 {
32 P(10, "ten"),
33 P(20, "twenty"),
34 P(30, "thirty"),
35 P(40, "fourty"),
36 P(50, "fifty"),
37 P(60, "sixty"),
38 P(70, "seventy"),
39 P(80, "eighty"),
40 };
41 const C c(std::begin(a), std::end(a));
42 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
43 }
44 {
45 typedef std::unordered_multimap<int, std::string> C;
46 typedef std::pair<int, std::string> P;
47 const C c;
48 assert(c.load_factor() == 0);
49 }
50 #if __cplusplus >= 201103L
51 {
52 typedef std::unordered_multimap<int, std::string, std::hash<int>, std::equal_to<int>,
53 min_allocator<std::pair<const int, std::string>>> C;
54 typedef std::pair<int, std::string> P;
55 P a[] =
56 {
57 P(10, "ten"),
58 P(20, "twenty"),
59 P(30, "thirty"),
60 P(40, "fourty"),
61 P(50, "fifty"),
62 P(60, "sixty"),
63 P(70, "seventy"),
64 P(80, "eighty"),
65 };
66 const C c(std::begin(a), std::end(a));
67 assert(fabs(c.load_factor() - (float)c.size()/c.bucket_count()) < FLT_EPSILON);
68 }
69 {
70 typedef std::unordered_multimap<int, std::string, std::hash<int>, std::equal_to<int>,
71 min_allocator<std::pair<const int, std::string>>> C;
72 typedef std::pair<int, std::string> P;
73 const C c;
74 assert(c.load_factor() == 0);
75 }
76 #endif
77 }
78