[antlr-interest] Java Grammar Question

[Simon]

Hi

I've been studying the Java grammar from the Antlr page and stumbled  
across the array access alternative in the identifierSuffix rule:

identifierSuffix
     :   ('[' ']')+ '.' 'class'
     |   ('[' expression ']')+ // can also be matched by selector, but  
do here
     ...
     ;

What is the motivation behind matching stuff like [1][2] in the  
identifer suffix and not in the selector rule?

selector
     :   '.' Identifier arguments?
     |   '.' 'this'
     |   '.' 'super' superSuffix
     |   '.' 'new' innerCreator
     |   '[' expression ']'
     ;

The two ways to match array accesses obviously introduces an ambiguity  
into the grammar. Or am I missing something?

Thanks
Simon