[antlr-interest] Throwing an excption in a Tree Action

[mzukowski at yci.com]

It looks like I am wrong about this.  You can specify other exceptions to
throw with the throws clause:

a throws MyException
  : A
  ;

Monty

> -----Original Message-----
> From: mzukowski at yci.com [mailto:mzukowski at yci.com]
> Sent: Thursday, June 20, 2002 8:37 AM
> To: antlr-interest at yahoogroups.com
> Subject: RE: [antlr-interest] Throwing an excption in a Tree Action
> 
> 
> No, you currently can't specify specific Exceptions that a 
> rule can throw.
> You have to make sure that the exceptions you throw are subclasses of
> RecognitionException.
> 
> Monty
> 
> > -----Original Message-----
> > From: Niall Gormley [mailto:ngormley at hotmail.com]
> > Sent: Thursday, June 20, 2002 8:35 AM
> > To: antlr-interest at yahoogroups.com
> > Subject: [antlr-interest] Throwing an excption in a Tree Action
> > 
> > 
> > Hi,
> > 
> > I would like to throw an exception in an action as per the 
> > grammar below. Is 
> > it possible to specify that it should throw my 
> > InvalidAssignmentException 
> > exception in the tree grammar?
> > 
> > Thanks Again,
> > Niall
> > 
> > assignmentExpression
> >   : #( ASSIGN i:IDENT p:primaryExpression)
> >     {
> >       System.out.println("Checking Assignment Statement: 
> > "+#i.getText()
> >                                                  +" "+#p.getText());
> >       if(#i.getType()!=#p.getType())
> >       {
> >         throw new InvalidAssignmentException("Cannot assign"
> >            + #i.getType() + " to " +  #p.getType());
> >       }
> >       else
> >       {
> >         System.out.println("Assingment OK");
> >       }
> >     }
> >   ;
> > 
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> 
>  
> 
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