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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 // <map>
11 
12 // class multimap
13 
14 // iterator erase(const_iterator position);
15 
16 #include <map>
17 #include <cassert>
18 
19 #include "min_allocator.h"
20 
main()21 int main()
22 {
23     {
24         typedef std::multimap<int, double> M;
25         typedef std::pair<int, double> P;
26         typedef M::iterator I;
27         P ar[] =
28         {
29             P(1, 1),
30             P(1, 1.5),
31             P(1, 2),
32             P(2, 1),
33             P(2, 1.5),
34             P(2, 2),
35             P(3, 1),
36             P(3, 1.5),
37             P(3, 2),
38         };
39         M m(ar, ar + sizeof(ar)/sizeof(ar[0]));
40         assert(m.size() == 9);
41         I i = m.erase(next(m.cbegin(), 3));
42         assert(m.size() == 8);
43         assert(i == next(m.begin(), 3));
44         assert(m.begin()->first == 1);
45         assert(m.begin()->second == 1);
46         assert(next(m.begin())->first == 1);
47         assert(next(m.begin())->second == 1.5);
48         assert(next(m.begin(), 2)->first == 1);
49         assert(next(m.begin(), 2)->second == 2);
50         assert(next(m.begin(), 3)->first == 2);
51         assert(next(m.begin(), 3)->second == 1.5);
52         assert(next(m.begin(), 4)->first == 2);
53         assert(next(m.begin(), 4)->second == 2);
54         assert(next(m.begin(), 5)->first == 3);
55         assert(next(m.begin(), 5)->second == 1);
56         assert(next(m.begin(), 6)->first == 3);
57         assert(next(m.begin(), 6)->second == 1.5);
58         assert(next(m.begin(), 7)->first == 3);
59         assert(next(m.begin(), 7)->second == 2);
60 
61         i = m.erase(next(m.cbegin(), 0));
62         assert(m.size() == 7);
63         assert(i == m.begin());
64         assert(next(m.begin(), 0)->first == 1);
65         assert(next(m.begin(), 0)->second == 1.5);
66         assert(next(m.begin(), 1)->first == 1);
67         assert(next(m.begin(), 1)->second == 2);
68         assert(next(m.begin(), 2)->first == 2);
69         assert(next(m.begin(), 2)->second == 1.5);
70         assert(next(m.begin(), 3)->first == 2);
71         assert(next(m.begin(), 3)->second == 2);
72         assert(next(m.begin(), 4)->first == 3);
73         assert(next(m.begin(), 4)->second == 1);
74         assert(next(m.begin(), 5)->first == 3);
75         assert(next(m.begin(), 5)->second == 1.5);
76         assert(next(m.begin(), 6)->first == 3);
77         assert(next(m.begin(), 6)->second == 2);
78 
79         i = m.erase(next(m.cbegin(), 5));
80         assert(m.size() == 6);
81         assert(i == prev(m.end()));
82         assert(next(m.begin(), 0)->first == 1);
83         assert(next(m.begin(), 0)->second == 1.5);
84         assert(next(m.begin(), 1)->first == 1);
85         assert(next(m.begin(), 1)->second == 2);
86         assert(next(m.begin(), 2)->first == 2);
87         assert(next(m.begin(), 2)->second == 1.5);
88         assert(next(m.begin(), 3)->first == 2);
89         assert(next(m.begin(), 3)->second == 2);
90         assert(next(m.begin(), 4)->first == 3);
91         assert(next(m.begin(), 4)->second == 1);
92         assert(next(m.begin(), 5)->first == 3);
93         assert(next(m.begin(), 5)->second == 2);
94 
95         i = m.erase(next(m.cbegin(), 1));
96         assert(m.size() == 5);
97         assert(i == next(m.begin()));
98         assert(next(m.begin(), 0)->first == 1);
99         assert(next(m.begin(), 0)->second == 1.5);
100         assert(next(m.begin(), 1)->first == 2);
101         assert(next(m.begin(), 1)->second == 1.5);
102         assert(next(m.begin(), 2)->first == 2);
103         assert(next(m.begin(), 2)->second == 2);
104         assert(next(m.begin(), 3)->first == 3);
105         assert(next(m.begin(), 3)->second == 1);
106         assert(next(m.begin(), 4)->first == 3);
107         assert(next(m.begin(), 4)->second == 2);
108 
109         i = m.erase(next(m.cbegin(), 2));
110         assert(m.size() == 4);
111         assert(i == next(m.begin(), 2));
112         assert(next(m.begin(), 0)->first == 1);
113         assert(next(m.begin(), 0)->second == 1.5);
114         assert(next(m.begin(), 1)->first == 2);
115         assert(next(m.begin(), 1)->second == 1.5);
116         assert(next(m.begin(), 2)->first == 3);
117         assert(next(m.begin(), 2)->second == 1);
118         assert(next(m.begin(), 3)->first == 3);
119         assert(next(m.begin(), 3)->second == 2);
120 
121         i = m.erase(next(m.cbegin(), 2));
122         assert(m.size() == 3);
123         assert(i == next(m.begin(), 2));
124         assert(next(m.begin(), 0)->first == 1);
125         assert(next(m.begin(), 0)->second == 1.5);
126         assert(next(m.begin(), 1)->first == 2);
127         assert(next(m.begin(), 1)->second == 1.5);
128         assert(next(m.begin(), 2)->first == 3);
129         assert(next(m.begin(), 2)->second == 2);
130 
131         i = m.erase(next(m.cbegin(), 0));
132         assert(m.size() == 2);
133         assert(i == next(m.begin(), 0));
134         assert(next(m.begin(), 0)->first == 2);
135         assert(next(m.begin(), 0)->second == 1.5);
136         assert(next(m.begin(), 1)->first == 3);
137         assert(next(m.begin(), 1)->second == 2);
138 
139         i = m.erase(next(m.cbegin(), 1));
140         assert(m.size() == 1);
141         assert(i == m.end());
142         assert(next(m.begin(), 0)->first == 2);
143         assert(next(m.begin(), 0)->second == 1.5);
144 
145         i = m.erase(m.cbegin());
146         assert(m.size() == 0);
147         assert(i == m.begin());
148         assert(i == m.end());
149     }
150 #if __cplusplus >= 201103L
151     {
152         typedef std::multimap<int, double, std::less<int>, min_allocator<std::pair<const int, double>>> M;
153         typedef std::pair<int, double> P;
154         typedef M::iterator I;
155         P ar[] =
156         {
157             P(1, 1),
158             P(1, 1.5),
159             P(1, 2),
160             P(2, 1),
161             P(2, 1.5),
162             P(2, 2),
163             P(3, 1),
164             P(3, 1.5),
165             P(3, 2),
166         };
167         M m(ar, ar + sizeof(ar)/sizeof(ar[0]));
168         assert(m.size() == 9);
169         I i = m.erase(next(m.cbegin(), 3));
170         assert(m.size() == 8);
171         assert(i == next(m.begin(), 3));
172         assert(m.begin()->first == 1);
173         assert(m.begin()->second == 1);
174         assert(next(m.begin())->first == 1);
175         assert(next(m.begin())->second == 1.5);
176         assert(next(m.begin(), 2)->first == 1);
177         assert(next(m.begin(), 2)->second == 2);
178         assert(next(m.begin(), 3)->first == 2);
179         assert(next(m.begin(), 3)->second == 1.5);
180         assert(next(m.begin(), 4)->first == 2);
181         assert(next(m.begin(), 4)->second == 2);
182         assert(next(m.begin(), 5)->first == 3);
183         assert(next(m.begin(), 5)->second == 1);
184         assert(next(m.begin(), 6)->first == 3);
185         assert(next(m.begin(), 6)->second == 1.5);
186         assert(next(m.begin(), 7)->first == 3);
187         assert(next(m.begin(), 7)->second == 2);
188 
189         i = m.erase(next(m.cbegin(), 0));
190         assert(m.size() == 7);
191         assert(i == m.begin());
192         assert(next(m.begin(), 0)->first == 1);
193         assert(next(m.begin(), 0)->second == 1.5);
194         assert(next(m.begin(), 1)->first == 1);
195         assert(next(m.begin(), 1)->second == 2);
196         assert(next(m.begin(), 2)->first == 2);
197         assert(next(m.begin(), 2)->second == 1.5);
198         assert(next(m.begin(), 3)->first == 2);
199         assert(next(m.begin(), 3)->second == 2);
200         assert(next(m.begin(), 4)->first == 3);
201         assert(next(m.begin(), 4)->second == 1);
202         assert(next(m.begin(), 5)->first == 3);
203         assert(next(m.begin(), 5)->second == 1.5);
204         assert(next(m.begin(), 6)->first == 3);
205         assert(next(m.begin(), 6)->second == 2);
206 
207         i = m.erase(next(m.cbegin(), 5));
208         assert(m.size() == 6);
209         assert(i == prev(m.end()));
210         assert(next(m.begin(), 0)->first == 1);
211         assert(next(m.begin(), 0)->second == 1.5);
212         assert(next(m.begin(), 1)->first == 1);
213         assert(next(m.begin(), 1)->second == 2);
214         assert(next(m.begin(), 2)->first == 2);
215         assert(next(m.begin(), 2)->second == 1.5);
216         assert(next(m.begin(), 3)->first == 2);
217         assert(next(m.begin(), 3)->second == 2);
218         assert(next(m.begin(), 4)->first == 3);
219         assert(next(m.begin(), 4)->second == 1);
220         assert(next(m.begin(), 5)->first == 3);
221         assert(next(m.begin(), 5)->second == 2);
222 
223         i = m.erase(next(m.cbegin(), 1));
224         assert(m.size() == 5);
225         assert(i == next(m.begin()));
226         assert(next(m.begin(), 0)->first == 1);
227         assert(next(m.begin(), 0)->second == 1.5);
228         assert(next(m.begin(), 1)->first == 2);
229         assert(next(m.begin(), 1)->second == 1.5);
230         assert(next(m.begin(), 2)->first == 2);
231         assert(next(m.begin(), 2)->second == 2);
232         assert(next(m.begin(), 3)->first == 3);
233         assert(next(m.begin(), 3)->second == 1);
234         assert(next(m.begin(), 4)->first == 3);
235         assert(next(m.begin(), 4)->second == 2);
236 
237         i = m.erase(next(m.cbegin(), 2));
238         assert(m.size() == 4);
239         assert(i == next(m.begin(), 2));
240         assert(next(m.begin(), 0)->first == 1);
241         assert(next(m.begin(), 0)->second == 1.5);
242         assert(next(m.begin(), 1)->first == 2);
243         assert(next(m.begin(), 1)->second == 1.5);
244         assert(next(m.begin(), 2)->first == 3);
245         assert(next(m.begin(), 2)->second == 1);
246         assert(next(m.begin(), 3)->first == 3);
247         assert(next(m.begin(), 3)->second == 2);
248 
249         i = m.erase(next(m.cbegin(), 2));
250         assert(m.size() == 3);
251         assert(i == next(m.begin(), 2));
252         assert(next(m.begin(), 0)->first == 1);
253         assert(next(m.begin(), 0)->second == 1.5);
254         assert(next(m.begin(), 1)->first == 2);
255         assert(next(m.begin(), 1)->second == 1.5);
256         assert(next(m.begin(), 2)->first == 3);
257         assert(next(m.begin(), 2)->second == 2);
258 
259         i = m.erase(next(m.cbegin(), 0));
260         assert(m.size() == 2);
261         assert(i == next(m.begin(), 0));
262         assert(next(m.begin(), 0)->first == 2);
263         assert(next(m.begin(), 0)->second == 1.5);
264         assert(next(m.begin(), 1)->first == 3);
265         assert(next(m.begin(), 1)->second == 2);
266 
267         i = m.erase(next(m.cbegin(), 1));
268         assert(m.size() == 1);
269         assert(i == m.end());
270         assert(next(m.begin(), 0)->first == 2);
271         assert(next(m.begin(), 0)->second == 1.5);
272 
273         i = m.erase(m.cbegin());
274         assert(m.size() == 0);
275         assert(i == m.begin());
276         assert(i == m.end());
277     }
278 #endif
279 }
280