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1 | // { dg-do compile } |
2 | // -*- C++ -*- | |
3 | ||
5624e564 | 4 | // Copyright (C) 2005-2015 Free Software Foundation, Inc. |
4569a895 AT |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the terms | |
8 | // of the GNU General Public License as published by the Free Software | |
748086b7 | 9 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
10 | // version. |
11 | ||
12 | // This library is distributed in the hope that it will be useful, but | |
13 | // WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | // General Public License for more details. | |
16 | ||
17 | // You should have received a copy of the GNU General Public License | |
748086b7 JJ |
18 | // along with this library; see the file COPYING3. If not see |
19 | // <http://www.gnu.org/licenses/>. | |
4569a895 | 20 | |
4569a895 AT |
21 | |
22 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
23 | ||
24 | // Permission to use, copy, modify, sell, and distribute this software | |
25 | // is hereby granted without fee, provided that the above copyright | |
26 | // notice appears in all copies, and that both that copyright notice | |
27 | // and this permission notice appear in supporting documentation. None | |
28 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
29 | // representation about the suitability of this software for any | |
30 | // purpose. It is provided "as is" without express or implied | |
31 | // warranty. | |
32 | ||
33 | /** | |
34 | * @file hash_bad_find_example.cpp | |
35 | * An example showing how *not* to use unordered containers. | |
36 | */ | |
37 | ||
38 | /** | |
39 | * This non-compiling example shows wrong use of unordered | |
40 | * associative-containers. These types of containers have distinct | |
41 | * point-type and range-type iterator types. | |
42 | **/ | |
43 | ||
44 | #include <utility> | |
45 | #include <ext/pb_ds/assoc_container.hpp> | |
46 | ||
47 | using namespace std; | |
5e11f978 | 48 | using namespace __gnu_pbds; |
4569a895 AT |
49 | |
50 | int main() | |
51 | { | |
52 | // A collision-chaining hash table mapping ints to chars. | |
53 | typedef cc_hash_table<int, char> map_t; | |
54 | ||
55 | // A map_t object. | |
56 | map_t h; | |
57 | ||
58 | // Insert a value mapping the int 1 to the char 'a'. | |
59 | h.insert(make_pair(1, 'a')); | |
60 | ||
61 | // Find the entry of the key '1' the* wrong* way. | |
62 | // The following line will not compile, since map_t::find returns a | |
63 | // point-iterator, which, by design, is not convertible to a | |
64 | // range-iterator. | |
65 | map_t::iterator it = h.find(1); // { dg-error "conversion from" } | |
66 | ||
67 | return 0; | |
68 | } | |
69 |