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_map
15
16// iterator erase(const_iterator first, const_iterator last)
17
18#include <unordered_map>
19#include <string>
20#include <cassert>
21
22#include "min_allocator.h"
23
24int main()
25{
26    {
27        typedef std::unordered_map<int, std::string> C;
28        typedef std::pair<int, std::string> P;
29        P a[] =
30        {
31            P(1, "one"),
32            P(2, "two"),
33            P(3, "three"),
34            P(4, "four"),
35            P(1, "four"),
36            P(2, "four"),
37        };
38        C c(a, a + sizeof(a)/sizeof(a[0]));
39        C::const_iterator i = c.find(2);
40        C::const_iterator j = next(i, 1);
41        C::iterator k = c.erase(i, i);
42        assert(k == i);
43        assert(c.size() == 4);
44        assert(c.at(1) == "one");
45        assert(c.at(2) == "two");
46        assert(c.at(3) == "three");
47        assert(c.at(4) == "four");
48
49        k = c.erase(i, j);
50        assert(c.size() == 3);
51        assert(k == j);
52        assert(c.at(1) == "one");
53        assert(c.at(3) == "three");
54        assert(c.at(4) == "four");
55
56        k = c.erase(c.cbegin(), c.cend());
57        assert(k == c.cend());
58        assert(c.size() == 0);
59        assert(k == c.end());
60    }
61#if __cplusplus >= 201103L
62    {
63        typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
64                            min_allocator<std::pair<const int, std::string>>> C;
65        typedef std::pair<int, std::string> P;
66        P a[] =
67        {
68            P(1, "one"),
69            P(2, "two"),
70            P(3, "three"),
71            P(4, "four"),
72            P(1, "four"),
73            P(2, "four"),
74        };
75        C c(a, a + sizeof(a)/sizeof(a[0]));
76        C::const_iterator i = c.find(2);
77        C::const_iterator j = next(i, 1);
78        C::iterator k = c.erase(i, i);
79        assert(k == i);
80        assert(c.size() == 4);
81        assert(c.at(1) == "one");
82        assert(c.at(2) == "two");
83        assert(c.at(3) == "three");
84        assert(c.at(4) == "four");
85
86        k = c.erase(i, j);
87        assert(c.size() == 3);
88        assert(k == j);
89        assert(c.at(1) == "one");
90        assert(c.at(3) == "three");
91        assert(c.at(4) == "four");
92
93        k = c.erase(c.cbegin(), c.cend());
94        assert(k == c.cend());
95        assert(c.size() == 0);
96        assert(k == c.end());
97    }
98#endif
99}
100