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/* This file is part of kdev-pg-qt
Copyright (C) 2005 Roberto Raggi <roberto@kdevelop.org>
Copyright (C) 2006 Jakob Petsovits <jpetso@gmx.at>
Copyright (C) 2006 Alexander Dymo <adymo@kdevelop.org>
Copyright (C) 2010 Jonathan Schmidt-Dominé <devel@the-user.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef KDEV_PG_FOLLOW_H
#define KDEV_PG_FOLLOW_H
#include "kdev-pg.h"
#include "kdev-pg-bnf-visitor.h"
namespace KDevPG
{
class InitializeFollow: protected DefaultVisitor
{
public:
void operator()(Model::Node *node);
protected:
virtual void visitSymbol(Model::SymbolItem *node);
};
class NextFollow: protected BnfVisitor
{
public:
NextFollow(bool &changed);
void operator()(Model::Node *node);
protected:
void merge(Model::Node *__dest, World::NodeSet const &source);
/**adds dependency between rule @p dep whose FIRST set is added to
@p dest FOLLOW set*/
void addFirstToFollowDep(Model::Node *dest, Model::Node *dep);
/**adds dependency between rule @p dep whose FOLLOW set is added to
@p dest FOLLOW set*/
void addFollowToFollowDep(Model::Node *dest, Model::Node *dep);
virtual void visitNode(Model::Node *node);
virtual void visitAlternative(Model::AlternativeItem *node);
virtual void visitCons(Model::ConsItem *node);
void preCopy(Model::Node *from, Model::Node *to);
void copy(Model::Node *from, Model::Node *to);
private:
bool &mChanged;
Model::SymbolItem *mSymbol;
QSet<Model::Node*> mVisited;
};
void computeFollow();
}
#endif // KDEV_PG_FOLLOW_H
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