// -*- C++ -*- // Copyright (C) 2005, 2006 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the terms // of the GNU General Public License as published by the Free Software // Foundation; either version 2, or (at your option) any later // version. // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // You should have received a copy of the GNU General Public License // along with this library; see the file COPYING. If not, write to // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, // MA 02111-1307, USA. // As a special exception, you may use this file as part of a free // software library without restriction. Specifically, if other files // instantiate templates or use macros or inline functions from this // file, or you compile this file and link it with other files to // produce an executable, this file does not by itself cause the // resulting executable to be covered by the GNU General Public // License. This exception does not however invalidate any other // reasons why the executable file might be covered by the GNU General // Public License. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. // Permission to use, copy, modify, sell, and distribute this software // is hereby granted without fee, provided that the above copyright // notice appears in all copies, and that both that copyright notice // and this permission notice appear in supporting documentation. None // of the above authors, nor IBM Haifa Research Laboratories, make any // representation about the suitability of this software for any // purpose. It is provided "as is" without express or implied // warranty. /** * @file sample_update_policy.hpp * Contains a sample policy for list update containers. */ #ifndef PB_DS_SAMPLE_UPDATE_POLICY_HPP #define PB_DS_SAMPLE_UPDATE_POLICY_HPP // A sample list-update policy. struct sample_update_policy { // Default constructor. sample_update_policy(); // Copy constructor. sample_update_policy(const sample_update_policy&); // Swaps content. inline void swap(sample_update_policy& other); protected: // Metadata on which this functor operates. typedef some_metadata_type metadata_type; // Creates a metadata object. metadata_type operator()() const; // Decides whether a metadata object should be moved to the front of // the list. A list-update based containers object will call this // method to decide whether to move a node to the front of the // list. The method shoule return true if the node should be moved // to the front of the list. bool operator()(metadata_reference) const; }; #endif