[antlr-interest] executing actions during backtrack

Terence Parr parrt at cs.usfca.edu
Tue May 9 18:10:18 PDT 2006


On May 9, 2006, at 3:03 PM, Jeff Barnes wrote:

> Like the Command Stack pattern? Gamma et al.

Yes, but for arbitrary actions.  Some statements like prints will  
never be "undoable", but for symbol tables it could work.  I'd prefer  
an automatic mechanism.

Ter



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