[antlr-interest] nested return statements

[genericised]

I am trying to get some rules in a parser to
return strings to each other in a heirarchy,
this is what I have so far:

file returns [String s] 
{s=""; String lineData="";}

       : {s+="<table align=\"center\" border=\"1\">\n";}
          lineData:(line)+
         {s+=lineData+"</table>\n";}
       ;

protected line returns [String rec] {rec="";String s="";}

       : {s+="  <tr>\n";}
          rec:((record)+) NEWLINE
         {
           s+=rec+"  <tr/>\n";
         }
       ;
protected record returns [String s] {s="";}

       : {s+="    <td>";} (r:RECORD) (COMMA)? {
          s+=(r.getText());
          s+="</td>";
       }
       ;

This does not work, and I know why it does not work
but I do not know how to get it to work...yet.

I can get it to work if I edit the generated parsers so that
they are like:

if ((LA(1)==RECORD)) {
  lineData=line();
}

so that the string lineData is assigned the value returned by
the line rule, how does one do this in ANTLR, is it possible?
(without modifying the generated parsers).


 

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