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1 | // -*- C++ -*- |
2 | ||
748086b7 | 3 | // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc. |
4569a895 AT |
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 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
4569a895 | 19 | |
748086b7 JJ |
20 | // You should have received a copy of the GNU General Public License and |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
4569a895 AT |
24 | |
25 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
26 | ||
27 | // Permission to use, copy, modify, sell, and distribute this software | |
28 | // is hereby granted without fee, provided that the above copyright | |
29 | // notice appears in all copies, and that both that copyright notice | |
30 | // and this permission notice appear in supporting documentation. None | |
31 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
32 | // representation about the suitability of this software for any | |
33 | // purpose. It is provided "as is" without express or implied | |
34 | // warranty. | |
35 | ||
36 | /** | |
37 | * @file sample_update_policy.hpp | |
38 | * Contains a sample policy for list update containers. | |
39 | */ | |
40 | ||
41 | #ifndef PB_DS_SAMPLE_UPDATE_POLICY_HPP | |
42 | #define PB_DS_SAMPLE_UPDATE_POLICY_HPP | |
43 | ||
a345e45d | 44 | namespace __gnu_pbds |
4569a895 | 45 | { |
a345e45d BK |
46 | /// A sample list-update policy. |
47 | struct sample_update_policy | |
48 | { | |
49 | // Default constructor. | |
50 | sample_update_policy(); | |
4569a895 | 51 | |
a345e45d BK |
52 | // Copy constructor. |
53 | sample_update_policy(const sample_update_policy&); | |
4569a895 | 54 | |
a345e45d BK |
55 | // Swaps content. |
56 | inline void | |
57 | swap(sample_update_policy& other); | |
4569a895 | 58 | |
a345e45d BK |
59 | protected: |
60 | // Metadata on which this functor operates. | |
61 | typedef some_metadata_type metadata_type; | |
4569a895 | 62 | |
a345e45d BK |
63 | // Creates a metadata object. |
64 | metadata_type | |
65 | operator()() const; | |
4569a895 | 66 | |
a345e45d BK |
67 | // Decides whether a metadata object should be moved to the front of |
68 | // the list. A list-update based containers object will call this | |
69 | // method to decide whether to move a node to the front of the | |
70 | // list. The method shoule return true if the node should be moved | |
71 | // to the front of the list. | |
72 | bool | |
73 | operator()(metadata_reference) const; | |
74 | }; | |
75 | } | |
76 | #endif |