[antlr-interest] treewalker in infinite loop

[Terence Parr]

On Jul 24, 2007, at 7:56 AM, Andy Tripp wrote:

> When I have an empty alternative in a treewalker, it gets into an  
> infinite loop.
> I assume it's the same bug as this one, which only mentions the  
> problem in a lexer:
> http://www.antlr.org:8888/browse/ANTLR-102

Is it ANTLR or the tree parser itself that loops?  If you do

a : ( foo )* ;

foo : ;

it might loop but that is what you asked for ;)

Ter