1 |
424 |
jeremybenn |
// -*- C++ -*-
|
2 |
|
|
|
3 |
|
|
// Copyright (C) 2005, 2006, 2009 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 terms
|
7 |
|
|
// of the GNU General Public License as published by the Free Software
|
8 |
|
|
// Foundation; either version 3, or (at your option) any later
|
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 |
|
|
// 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.
|
19 |
|
|
|
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/>.
|
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 |
|
|
|
44 |
|
|
// A sample list-update policy.
|
45 |
|
|
struct sample_update_policy
|
46 |
|
|
{
|
47 |
|
|
// Default constructor.
|
48 |
|
|
sample_update_policy();
|
49 |
|
|
|
50 |
|
|
// Copy constructor.
|
51 |
|
|
sample_update_policy(const sample_update_policy&);
|
52 |
|
|
|
53 |
|
|
// Swaps content.
|
54 |
|
|
inline void
|
55 |
|
|
swap(sample_update_policy& other);
|
56 |
|
|
|
57 |
|
|
protected:
|
58 |
|
|
// Metadata on which this functor operates.
|
59 |
|
|
typedef some_metadata_type metadata_type;
|
60 |
|
|
|
61 |
|
|
// Creates a metadata object.
|
62 |
|
|
metadata_type
|
63 |
|
|
operator()() const;
|
64 |
|
|
|
65 |
|
|
// Decides whether a metadata object should be moved to the front of
|
66 |
|
|
// the list. A list-update based containers object will call this
|
67 |
|
|
// method to decide whether to move a node to the front of the
|
68 |
|
|
// list. The method shoule return true if the node should be moved
|
69 |
|
|
// to the front of the list.
|
70 |
|
|
bool
|
71 |
|
|
operator()(metadata_reference) const;
|
72 |
|
|
};
|
73 |
|
|
|
74 |
|
|
#endif
|