We have been discussing how to pass data to Tk callbacks. In particular Entry widget validation routines. There are a number of items that they _might_ be interested in but a typical routine would only use a few. Currently it passes them all as positional parameters.
One idea that occured to me/us is to have a "localized" hash for this purpose (which might be tied/magical). One choice of name for this is %_ - which fits neatly with @_ for positional args and $_ as current thing. Also *_ glob already exists to have its GvHV entry (ab-)used. What does p5p think of this use ? Basically @_ says "how" you been called $_ is "what" you are working on, and this idea gives %_ the meaning of "why". (Caller gives the "who" ;-) )
