[antlr-interest] More on TokenWithIndex

[Terence Parr]

On Oct 27, 2004, at 10:08 AM, John D. Mitchell wrote:
> (B) The attribute support coming in v3 will certainly make that easy  
> to do.
> That's a wicked tease, I know.  I'm jonesing for that very support  
> right
> now in a translator that I'm working on as that built-in dynamic  
> attribute
> support would make all sorts of things that I'm doing quicker and  
> easier to
> do.

Hi John,

BTW, I ran this scoped attribute / dynamic scoping attribute stuff  
intended for 3.0 past an attribute grammar expert at dinner.  She  
agreed it was interesting; she suggested that Uwe Kastens had already  
done something similar.  I just found this:

http://ag-kastens.uni-paderborn.de/lehre/material/compi/folien/ci67 
-78d.ps

He calls it "Dependency pattern INCLUDING".  "An attribute at the root  
of a subtree is sued from within the subtree. Propagation through the  
context in between is omitted."

So that is what we are talking about with dynamic scoping 'cept that we  
use named scopes rather than rulename.attr.  Thankfully the antlr2004  
workshop discovered this need!

Ter
--
CS Professor & Grad Director, University of San Francisco
Creator, ANTLR Parser Generator, http://www.antlr.org
Cofounder, http://www.jguru.com
Cofounder, http://www.knowspam.net enjoy email again!





 
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