[antlr-interest] ANTLR 3.1 gives RewriteEmptyStreamException, ANTLR3.0.1 does not ?

[David Pearce]

Hi Terence,

Thanks for the quick response!!!

> Notice the ? is in the tree construction not the matching.

Ok, I hadn't noticed the difference.  Yes, that might be exactly the 
solution to my problem --- thanks!!

Dave

>>> classDeclaration
>>>    :    'class' Identifier (typeParameters)?
>>>        ('extends' type)?         ('implements' typeList)?
>>>        classBody
>>>    ;
>>> ...
>>> classBody
>>>    :    '{' classBodyDeclaration* '}'
>>>    ;
>>> ...
>>> classBodyDeclaration
>>>    :    ';'
>>>    |    ... [other productions]
>>>    ;
> 
> I don't understand the issue.  Don't alter the matching, just add ? to 
> the ast constr.
> Ter

-- 
Lecturer in Computer Science,
School of Mathematics, Statistics and Computer Science,
Victoria University of Wellington,
PO Box 600,
Wellington,
New Zealand.

Office: Cotton 231
Telephone: +64 (0)4 463 5833
URL: http://www.mcs.vuw.ac.nz/~djp