Subject: Re: temporarily setting a package From: Erik Naggum <email@example.com> Date: 1998/04/13 Newsgroups: comp.lang.lisp Message-ID: <firstname.lastname@example.org> * Sam Steingold | Erik's solution for the :key/#'reduce ACL problem starts with | (in-package :franz) and ends with (in-package :user). huh? it doesn't end with (in-package :user) in any version I can find that I have posted. where did you get one that did? the purpose of IN-PACKAGE is to ensure that symbols are interned in a known package so the compiler can make certain optimizations and the user of a file can live a less interesting life. it is not for interactive use. (in Allegro CL, you use the top-level command :PACKAGE for that.) you should just stuff my advice code in a file, perhaps compile it, and then load it. it should not be prefixed onto other source code, which is what it appears that you're doing. LOAD will bind *PACKAGE* across loading, so it can be changed during loading. COMPILE-FILE will do the same. | what if I wasn't in :user? the obvious solution is not to invoke IN-PACKAGE when you need the value of the same binding of *PACKAGE* afterwards. which, again, LOAD takes care of for you: you get the same binding of *PACKAGE* after LOAD as before, because the one that may have been changed inside the loaded object is a different binding. matter of fact, (in-package :franz) does only a little more than (eval-when (:compile-toplevel :load-toplevel :execute) (setq *package* :franz)) which works because *PACKAGE* is bound by LOAD and COMPILE-FILE. #:Erik -- religious cult update in light of new scientific discoveries: "when we cannot go to the comet, the comet must come to us."