Re: Macros: Scheme vs Common Lisp

>>>>> "Craig" == Craig Lanning <CraigL(a)internetx.net&gt; writes: Craig> At 02:20 PM 8/26/98 +0200, Michael Sperber [Mr. Preprocessor] wrote: >>>>>>> "Holger" == Holger Schauer <schauer(a)coling.uni-freiburg.de&gt; writes: >> >>>>>>> "MS" == Michael Sperber schrieb am 26 Aug 1998 12:14:52 +0200: >> MS> Can you explain to me why the above should lead to a different MS> result? CLISP's output is exactly what I expected it to be: >> MS> (setq bar 23) MS> (defmacro foo () bar) ; this means (foo) expands to the value of BAR >> Holger> Isn't this meant to mean to refer to the current binding of bar, > which Holger> in this case happens to be 23 ? >> >> What do you mean by "current"? BAR is supposed to refer to the >> binding introduced by (setq bar 23), which is the lexically enclosing >> one. The question is: when is the binding resolved? Craig> At macro expansion time. :-) This doesn't clarify the relationship in time between binding resolution and the binding mutations in the code.