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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.h,v 1.7 2002/12/13 17:21:54 sdw 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();
00049   void parse();
00054   void setTopNode(skMethodDefNode* pNode);
00058   skMethodDefNode * getTopNode();
00062   void addParseNode(skParseNode* pNode);
00066   void appendError(const skString& msg);
00070   const skCompileErrorList& getErrList();
00076   int lex(void * lvalp,void * lloc); // returns a token
00080   int nextChar(); 
00084   void putbackchar(int i); 
00088   bool eof(); 
00092   void cleanupTempNodes(); 
00096   void clearTempNodes();
00097   
00098  private:
00102    skMethodDefNode*             m_TopNode;
00103    skParseNodeList              m_TempNodes;
00104    skCompileErrorList   m_ErrList;
00105    
00106    Char m_LexBuffer[MAXYYTEXT]; //  used by lexical analyser to hold the current token
00107    skString m_InputBuffer; // the buffer read by the lexer
00108    int m_PutBack; // character to be put back
00109    int m_LineNum; // linenumber being lexed
00110    unsigned int m_Pos; //  position in the line
00111    skString m_Location;
00112 };
00113 
00114 #endif

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