[antlr-interest] Article against TreeWalkers

Jeff Barnes Jeff.Barnes at codesic.com
Thu Mar 9 14:14:14 PST 2006

Andrew sez:
> You are parsing a 1-D input and producing a tree output, right?  What
> am I missing here?

Terence sez:

<snip> Once you have a 
tree, you need to walk it either by hand or by grammar.  By grammar, 
you can serialize a tree by adding imaginary nodes UP and DOWN that 
encode 2D aspect.  

Jeff sez:
So, why aren't there UP and DOWN tokens in the tree metalanguage? Or am I missing something? Methinks that would coolify a TreeWalker.

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