[antlr-interest] How to return my own objects ?

[Gavin Lambert]

At 10:51 18/08/2008, Le Lann Jean-Christophe wrote:
 >expr returns [MyExpr expr] :
 >    ^( '+' e1=expr e2=expr) { $expr = new MyExpr("+",e1,e2);}
 >    | INT                   { $expr = new MyExpr(new
 >String($INT.text));}
 >        ;

Technically, if you want the return value from that then instead 
of using e1/e2 in your code you should be using $e1.expr / 
$e2.expr.

 >architecture returns [Architecture arch] :
 >                    ^(ARCHITECTURE ID <skipped>)
 >            {$arch=new Architecture(new String(ID.text));}

Similarly here you should be using $ID.text, and wherever this is 
being invoked from you should be using $something.arch.

If you use the proper syntax then ANTLR takes care of the 
differences for you ;)