libstdc++
sample_update_policy.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2019 Free Software Foundation, Inc.
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25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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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 namespace __gnu_pbds
45 {
46  /// A sample list-update policy.
48  {
49  /// Default constructor.
51 
52  /// Copy constructor.
54 
55  /// Swaps content.
56  inline void
57  swap(sample_update_policy& other);
58 
59  protected:
60  /// Metadata on which this functor operates.
61  typedef some_metadata_type metadata_type;
62 
63  /// Creates a metadata object.
65  operator()() const;
66 
67  /// Decides whether a metadata object should be moved to the front
68  /// of the list. A list-update based containers object will call
69  /// this method to decide whether to move a node to the front of
70  /// the list. The method shoule return true if the node should be
71  /// moved to the front of the list.
72  bool
73  operator()(metadata_reference) const;
74  };
75 }
76 #endif
GNU extensions for policy-based data structures for public use.
some_metadata_type metadata_type
Metadata on which this functor operates.
void swap(sample_update_policy &other)
Swaps content.
sample_update_policy()
Default constructor.
metadata_type operator()() const
Creates a metadata object.
A sample list-update policy.