[antlr-interest] Parser Exception-Handlers with Labels

[Terence Parr]

On Jun 14, 2006, at 9:37 AM, Carleton Coffrin wrote:

> I am using the Java ANTLR compiler 2.7.5 and am having some difficulty
> using labeled Exception-Handlers.  When I use a label to refer to a
> grammar rule the code for that exception is not generated.  For
> example,
>
> identifier returns [ASTIdentifier n = null] : x:ID { n = new
> ASTIdentifier(tok(x)); }
> 	;	
> 	exception catch [RecognitionException ex] {reportError(ex,
> "identifier message");}
> 	exception[x] catch [TokenStreamException ex] {reportError(ex, "ID
> token Mmssage");}  //This works great!
> 	
>
> autoDef {ASTIdentifier n;}
> 	: auto:"auto" n=identifier
> 	;
>    exception catch [RecognitionException ex] {reportError(ex,
> "autoDef message");}
>    exception[n] catch [This does] {not(get,"identifier rule
> message");}  //<-------------- This never makes it to the generated
> code

Perhaps there is a bug that only token labels work...

Ter