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skParser.h

/*
  Copyright 1996-2002
  Simon Whiteside

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  $Id: skParser_8h-source.html,v 1.17 2004/12/17 21:31:14 sdw Exp $
*/

#ifndef skPARSER_H
#define skPARSER_H

#include "skParseException.h"
#include "skParseNode.h"

#ifdef __SYMBIAN32__
const int MAXYYTEXT=256;
#else
const int MAXYYTEXT=4096;
#endif

class  skParser 
#ifdef __SYMBIAN32__
: public CBase
#endif
{
 public:
  skParser(const skString& code,const skString& location);
  ~skParser();
  skMethodDefNode * parseMethod();
#ifdef EXECUTE_PARSENODES
  skExprNode * parseExpression();
#else
  skCompiledExprNode * parseExpression();
#endif
#ifdef __SYMBIAN32__

  operator TCleanupItem();
  static void Cleanup(TAny * s);
#endif

  void setTopNode(skParseNode* pNode);
  void removeTempString(skString* str);
  void addParseNode(skParseNode* pNode);
  void appendError(const skString& msg);
  void appendError(const Char * msg);
  skCompileErrorList& getErrList();
  int lex(void * lvalp,void * lloc); // returns a token
 private:
  int nextChar(); 
  void putbackchar(int i); 
  bool eof(); 
#ifdef EXECUTE_PARSENODES

  skString * lookupIdentifier(const Char * id);
#else

  int lookupIdentifier(const Char * id);
#endif

  void cleanupTempNodes(); 
  void clearTempNodes();
  
   skParseNode*         m_TopNode;
   skParseNodeList      m_TempNodes;
   skTAList<skString>   m_TempStringLiterals;
#ifdef EXECUTE_PARSENODES
   skTAList<skString>   m_Identifiers;
#else
   skStringList m_Identifiers;
#endif
   skCompileErrorList   m_ErrList;
   
   Char * m_LexBuffer; //  used by lexical analyser to hold the current token
   skString m_InputBuffer; // the buffer read by the lexer
   int m_PutBack; // character to be put back
   int m_LineNum; // linenumber being lexed
   unsigned int m_Pos; //  position in the line
   skString m_Location;
};

#endif

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