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1 | // -*- C++ -*- |
2 | ||
a5544970 | 3 | // Copyright (C) 2005-2019 Free Software Foundation, Inc. |
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4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the terms | |
7 | // of the GNU General Public License as published by the Free Software | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
9 | // version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, but | |
12 | // WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | // General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License | |
748086b7 JJ |
17 | // along with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
4569a895 | 19 | |
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20 | |
21 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
22 | ||
23 | // Permission to use, copy, modify, sell, and distribute this software | |
24 | // is hereby granted without fee, provided that the above copyright | |
25 | // notice appears in all copies, and that both that copyright notice | |
26 | // and this permission notice appear in supporting documentation. None | |
27 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
28 | // representation about the suitability of this software for any | |
29 | // purpose. It is provided "as is" without express or implied | |
30 | // warranty. | |
31 | ||
32 | /** | |
33 | * @file basic_map_example.cpp | |
34 | * A basic example showing how to use maps. | |
35 | */ | |
36 | ||
37 | /** | |
38 | * This example shows how to use "maps". It defines a | |
39 | * function performing a sequence of operations on | |
40 | * a generic container. It then calls this function with some containers. | |
41 | */ | |
42 | ||
43 | #include <iostream> | |
44 | #include <cassert> | |
45 | #include <ext/pb_ds/assoc_container.hpp> | |
46 | ||
47 | using namespace std; | |
5e11f978 | 48 | using namespace __gnu_pbds; |
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49 | |
50 | // The following function performs a sequence of operations on an | |
51 | // associative container object mapping integers to characters. | |
52 | template<class Cntnr> | |
53 | void | |
54 | some_op_sequence(Cntnr& r_c) | |
55 | { | |
56 | assert(r_c.empty()); | |
57 | assert(r_c.size() == 0); | |
58 | ||
59 | r_c.insert(make_pair(1, 'a')); | |
60 | ||
61 | r_c[2] = 'b'; | |
62 | ||
63 | assert(!r_c.empty()); | |
64 | assert(r_c.size() == 2); | |
65 | ||
66 | cout << "Key 1 is mapped to " << r_c[1] << endl; | |
67 | cout << "Key 2 is mapped to " << r_c[2] << endl; | |
68 | ||
69 | cout << endl << "All value types in the container:" << endl; | |
70 | ||
71 | typedef typename Cntnr::const_iterator const_iterator; | |
72 | for (const_iterator it = r_c.begin(); it != r_c.end(); ++it) | |
73 | cout << it->first << " -> " << it->second << endl; | |
74 | cout << endl; | |
75 | ||
76 | r_c.clear(); | |
77 | ||
78 | assert(r_c.empty()); | |
79 | assert(r_c.size() == 0); | |
80 | } | |
81 | ||
82 | int main() | |
83 | { | |
84 | { | |
85 | // Perform operations on a collision-chaining hash map. | |
86 | cc_hash_table<int, char> c; | |
87 | some_op_sequence(c); | |
88 | } | |
89 | ||
90 | { | |
91 | // Perform operations on a general-probing hash map. | |
92 | gp_hash_table<int, char> c; | |
93 | some_op_sequence(c); | |
94 | } | |
95 | ||
96 | { | |
97 | // Perform operations on a red-black tree map. | |
98 | tree<int, char> c; | |
99 | some_op_sequence(c); | |
100 | } | |
101 | ||
102 | { | |
103 | // Perform operations on a splay tree map. | |
104 | tree<int, char, less<int>, splay_tree_tag> c; | |
105 | some_op_sequence(c); | |
106 | } | |
107 | ||
108 | { | |
109 | // Perform operations on an ov tree map. | |
110 | tree<int, char, less<int>, ov_tree_tag> c; | |
111 | some_op_sequence(c); | |
112 | } | |
113 | ||
114 | { | |
115 | // Perform operations on a list-update map. | |
116 | list_update<int, char> c; | |
117 | some_op_sequence(c); | |
118 | } | |
119 | } |