[antlr-interest] Error recovery - HELP

Matt Benson gudnabrsam at yahoo.com
Wed Apr 21 12:54:00 PDT 2004


Maybe you should look into Bogdan Mitu's SATC package.
 Check the ANTLR filesharing area...

-Matt


--- jduquevieira <jpdv at medialog.pt> wrote:
> I have a simple Math gramar.
> And it's used in a graphical Math editor.
> 
> The editor user has to be able to write incomplete
> expressions 
> like "(2+".
> And when the user writes this, I have to get an
> incomplete tree, not 
> an exception.
> 
> Any ideas?
> Here goes the gramar.
> 
> Best regards.
> 
> 
> 
> expression
> 	:	equal
> 	;
>     
> equal
> 	:	sum (EQUAL^ sum)*
>     ;
> 
> sum
> 	:	subtraction (PLUS^ subtraction)*
>     ;
> 	
> subtraction
> 	:	product (MINUS^ product)*
>     ;
> 	
> product
> 	:	division (TIMES^ division)*
>     ;
> 	
> division
> 	:	number (DIV^ number)*
>     ;
> 
> number
> 	:	NUMBER
> 	|	LEFT_PARENT expression RIGHT_PARENT
> 	;
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
>      antlr-interest-unsubscribe at yahoogroups.com
> 
>  
> 



	
		
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