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1 | // -*- C++ -*- |
2 | ||
3 | // Copyright (C) 2005 Free Software Foundation, Inc. | |
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 | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 2, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING. If not, write to the Free | |
83f51799 | 18 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
fd1e1726 BK |
19 | // USA. |
20 | ||
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
30 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
31 | ||
32 | // Permission to use, copy, modify, sell, and distribute this software | |
33 | // is hereby granted without fee, provided that the above copyright | |
34 | // notice appears in all copies, and that both that copyright notice and | |
35 | // this permission notice appear in supporting documentation. None of | |
36 | // the above authors, nor IBM Haifa Research Laboratories, make any | |
37 | // representation about the suitability of this software for any | |
38 | // purpose. It is provided "as is" without express or implied warranty. | |
39 | ||
40 | /** | |
41 | * @file erase_if_example.cpp | |
42 | * A basic example showing how to use erase_if. | |
43 | */ | |
44 | ||
45 | // For various associative containers. | |
46 | #include <ext/pb_assoc/assoc_cntnr.hpp> | |
47 | // For cout, endl. | |
48 | #include <iostream> | |
49 | // For assert. | |
50 | #include <cassert> | |
51 | ||
52 | struct between : public std::unary_function< | |
53 | std::pair<const int, char>, | |
54 | bool> | |
55 | { | |
56 | between(int b, int e) : m_b(b), | |
57 | m_e(e) | |
58 | { } | |
59 | ||
60 | inline bool | |
61 | operator()(std::pair<const int, char>& r_val) | |
62 | { | |
63 | return (r_val.first >= m_b&& r_val.first < m_e); | |
64 | } | |
65 | ||
66 | private: | |
67 | const int m_b; | |
68 | const int m_e; | |
69 | }; | |
70 | ||
71 | template<class Cntnr> | |
72 | void | |
73 | some_op_sequence(Cntnr c) | |
74 | { | |
75 | assert(c.empty()); | |
76 | assert(c.size() == 0); | |
77 | ||
78 | for (int i = 0; i < 100; ++i) | |
79 | c.insert(std::make_pair(i, static_cast<char>(i))); | |
80 | ||
81 | assert(c.size() == 100); | |
82 | ||
83 | /* Erase all values whose key is between 10 (inclusive) | |
84 | * and 90 (non-inclusive). | |
85 | */ | |
86 | c.erase_if(between(10 , 90)); | |
87 | ||
88 | assert(!c.empty()); | |
89 | assert(c.size() == 20); | |
90 | } | |
91 | ||
92 | int | |
93 | main() | |
94 | { | |
95 | ||
96 | /* | |
97 | * Perform operations on a list-update set. | |
98 | */ | |
99 | some_op_sequence(pb_assoc::lu_assoc_cntnr<int, char>()); | |
100 | ||
101 | /* | |
102 | * Perform operations on a collision-chaining hash set. | |
103 | */ | |
104 | some_op_sequence(pb_assoc::cc_hash_assoc_cntnr<int, char>()); | |
105 | ||
106 | /* | |
107 | * Perform operations on a general-probing hash set. | |
108 | */ | |
109 | some_op_sequence(pb_assoc::gp_hash_assoc_cntnr<int, char>()); | |
110 | ||
111 | /* | |
112 | * Perform operations on a red-black tree set. | |
113 | */ | |
114 | some_op_sequence(pb_assoc::tree_assoc_cntnr<int, char>()); | |
115 | ||
116 | /* | |
117 | * Perform operations on a splay tree set. | |
118 | */ | |
119 | some_op_sequence(pb_assoc::tree_assoc_cntnr< | |
120 | int, | |
121 | char, | |
122 | std::less<int>, | |
123 | pb_assoc::splay_tree_ds_tag>()); | |
124 | ||
125 | /* | |
126 | * Perform operations on a splay tree set. | |
127 | */ | |
128 | some_op_sequence(pb_assoc::tree_assoc_cntnr< | |
129 | int, | |
130 | char, | |
131 | std::less<int>, | |
132 | pb_assoc::ov_tree_ds_tag>()); | |
133 | } |