erase_const_iter.pass.cpp revision a8bf9de8057ad254cc642f33bd7d0a48dc1ae55c 
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// iterator erase(const_iterator p)
17
18#include <unordered_map>
19#include <string>
20#include <cassert>
21
22int main()
23{
24    {
25        typedef std::unordered_multimap<int, std::string> C;
26        typedef std::pair<int, std::string> P;
27        P a[] =
28        {
29            P(1, "one"),
30            P(2, "two"),
31            P(3, "three"),
32            P(4, "four"),
33            P(1, "four"),
34            P(2, "four"),
35        };
36        C c(a, a + sizeof(a)/sizeof(a[0]));
37        C::const_iterator i = c.find(2);
38        C::iterator j = c.erase(i);
39
40        assert(c.size() == 5);
41        typedef std::pair<C::const_iterator, C::const_iterator> Eq;
42        Eq eq = c.equal_range(1);
43        assert(std::distance(eq.first, eq.second) == 2);
44        C::const_iterator k = eq.first;
45        assert(k->first == 1);
46        assert(k->second == "one");
47        ++k;
48        assert(k->first == 1);
49        assert(k->second == "four");
50        eq = c.equal_range(2);
51        assert(std::distance(eq.first, eq.second) == 1);
52        k = eq.first;
53        assert(k->first == 2);
54        assert(k->second == "four");
55        eq = c.equal_range(3);
56        assert(std::distance(eq.first, eq.second) == 1);
57        k = eq.first;
58        assert(k->first == 3);
59        assert(k->second == "three");
60        eq = c.equal_range(4);
61        assert(std::distance(eq.first, eq.second) == 1);
62        k = eq.first;
63        assert(k->first == 4);
64        assert(k->second == "four");
65        assert(std::distance(c.begin(), c.end()) == c.size());
66        assert(std::distance(c.cbegin(), c.cend()) == c.size());
67    }
68}
69