common_token.sa

Java写的词法/语法分析器。可生成JAVA语言或者是C++的词法和语法分析器。并可产生语法分析树和对该树进行遍历

(* 

  ANTLR Translator Generator
  Project led by Terence Parr at http://www.jGuru.com
  Software rights: http://www.antlr.org/RIGHTS.html
 
  $Id: //depot/code/org.antlr/release/antlr-2.7.0/lib/sather/Antlr/common_token.sa#1 $

*)

class ANTLR_COMMON_TOKEN < $ANTLR_TOKEN is

   -- constants
   const MIN_USER_TYPE       : INT :=  4;
   const NULL_TREE_LOOKAHEAD : INT :=  3;
   const INVALID_TYPE        : INT :=  0;
   const EOF_TYPE            : INT :=  1;
   const SKIP                : INT := -1;

   attr column : INT;
   attr line   : INT;
   attr ttype  : INT;
   attr text   : STR;

   create : SAME is
      res : SAME := new;
      res.ttype := INVALID_TYPE;
      return res;
   end;

   create( t: INT ) : SAME is
      res : SAME := new;
      res.ttype := t;
      return res;
   end;

   create( t: INT , txt : STR ) : SAME is
      res : SAME := new;
      res.ttype := t;
      res.text := txt;
      return res;
   end;


   str: STR is
      return "[\"" + text + "\",<" + ttype + ">,line=" + line + "]";
   end;

   invalid : BOOL is
      return ( ttype = INVALID_TYPE );
   end;

end;