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forcer@mindless.com writes: > On Thu, Oct 29, 1998 at 11:32:18PM -0500, Russell McManus wrote: > >Scott Goehring <scott@poverty.bloomington.in.us> writes: > > > >> SIOD, or at least the SIOD in script-fu, lets you set! a previously > >> unbound variable. So (set! foo 5) is perfectly legal in script-fu, > >> but raises an exception in guile. Unfortunately, a number of > >> script-fu script authors have made use of this anomalous behavior. > > > >Maybe this quick hack can be the beginning of a solution (guile > >specific code): > > > >(define %set! set!) > >(defmacro set! (name value) > > `(begin > > (if (not (defined? (quote ,name))) > > (define ,name #f)) > > (%set! ,name ,value))) > > Uhm, why do you emulate define? :) (this does not solve the problem that > SIOD's set! returns the new value though) > > (define set! define) Neither of these will DTRT, it has to set! if the variable is _globally or locally_ bound, and define _at top level_, even if nested, if not bound. See my posted version which will DTRT. - Maciej