[antlr-interest] Expr.text null?

[Terence Parr]

On Aug 12, 2008, at 4:34 PM, Foust wrote:

>> From: Terence Parr [mailto:parrt at cs.usfca.edu]
>> Sent: Tuesday, August 12, 2008 3:32 PM
>> To: Foust
>> Cc: antlr-interest at antlr.org
>> Subject: Re: [antlr-interest] Expr.text null?
>>
>> should work.  java target right?  did you setTokenStream on the node
>> stream?
>> Ter
>
> Yes, Java target, ASTLabelType set like this:
>
>  tree grammar RunModl;
>  options {
> 	tokenVocab=Modl;
> 	ASTLabelType=CommonTree;
>  }
>
> And the rule is just a little more complicated, in that
> 	expr: a? b;
>
> is actually more like:
> 	
> 	expr: ^(EXPR_TOKEN a? b)
> 		{ $a.text is also null here }
>
> 	a   options {backtrack=true; memoize=true;}	
> 	   : ^(PART1_TOKEN IDENT ...)
> 		{ $IDENT.text is correct here }

Likely PART1_TOKEN has no token indexes set.

Do you create PART1_TOKEN as a root of a rule in parser?  If not,  
indexes probably not set.
Ter