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skParser.h

00001 /*
00002   Copyright 1996-2002
00003   Simon Whiteside
00004 
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Lesser General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009 
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Lesser General Public License for more details.
00014 
00015     You should have received a copy of the GNU Lesser General Public
00016     License along with this library; if not, write to the Free Software
00017     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018 
00019   $Id: skParser_8h-source.html,v 1.5 2003/01/23 15:31:03 simkin_cvs Exp $
00020 */
00021 
00022 #ifndef skPARSER_H
00023 #define skPARSER_H
00024 
00025 #include "skParseException.h"
00026 #include "skParseNode.h"
00027 
00028 const int MAXYYTEXT=4096;
00029 
00033 class  skParser {
00034  public:
00040   skParser(const skString& code,const skString& location);
00044   ~skParser();
00050   skMethodDefNode * parseMethod();
00056   skExprNode * parseExpression();
00061   void setTopNode(skParseNode* pNode);
00065   void addParseNode(skParseNode* pNode);
00069   void appendError(const skString& msg);
00073   const skCompileErrorList& getErrList();
00079   int lex(void * lvalp,void * lloc); // returns a token
00083   int nextChar(); 
00087   void putbackchar(int i); 
00091   bool eof(); 
00092  private:
00099   void cleanupTempNodes(); 
00103   void clearTempNodes();
00104   
00105    skParseNode*         m_TopNode;
00106    skParseNodeList              m_TempNodes;
00107    skCompileErrorList   m_ErrList;
00108    
00109    Char m_LexBuffer[MAXYYTEXT]; //  used by lexical analyser to hold the current token
00110    skString m_InputBuffer; // the buffer read by the lexer
00111    int m_PutBack; // character to be put back
00112    int m_LineNum; // linenumber being lexed
00113    unsigned int m_Pos; //  position in the line
00114    skString m_Location;
00115 };
00116 
00117 #endif

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