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nodevisitor.hh

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Guido Tack, 2006
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  * Permission is hereby granted, free of charge, to any person obtaining
00014  * a copy of this software and associated documentation files (the
00015  * "Software"), to deal in the Software without restriction, including
00016  * without limitation the rights to use, copy, modify, merge, publish,
00017  * distribute, sublicense, and/or sell copies of the Software, and to
00018  * permit persons to whom the Software is furnished to do so, subject to
00019  * the following conditions:
00020  *
00021  * The above copyright notice and this permission notice shall be
00022  * included in all copies or substantial portions of the Software.
00023  *
00024  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 #ifndef GECODE_GIST_NODEVISITOR_HH
00035 #define GECODE_GIST_NODEVISITOR_HH
00036 
00037 namespace Gecode { namespace Gist {
00038 
00040   template<class Cursor>
00041   class NodeVisitor {
00042   protected:
00044     Cursor c;
00045   public:
00047     NodeVisitor(const Cursor& c0);
00049     void setCursor(const Cursor& c0);
00051     Cursor& getCursor(void);
00052   };
00053 
00055   template<class Cursor>
00056   class PostorderNodeVisitor : public NodeVisitor<Cursor> {
00057   protected:
00058     using NodeVisitor<Cursor>::c;
00060     void moveToLeaf(void);
00061   public:
00063     PostorderNodeVisitor(const Cursor& c);
00065     bool next(void);
00067     void run(void);
00068   };
00069 
00071   template<class Cursor>
00072   class PreorderNodeVisitor : public NodeVisitor<Cursor> {
00073   protected:
00074     using NodeVisitor<Cursor>::c;
00076     bool backtrack(void);
00077   public:
00079     PreorderNodeVisitor(const Cursor& c);
00081     bool next(void);
00083     void run(void);
00084   };
00085 
00086 }}
00087 
00088 #include <gecode/gist/nodevisitor.hpp>
00089 
00090 #endif
00091 
00092 // STATISTICS: gist-any