[Ecls-list] Package locks and symbol-package

[Matthew Mondor]

On Tue, 09 Oct 2012 21:17:22 -0400
Zach Beane <xach at xach.com> wrote:

> The default package use list if :use is not provided is
> implementation-defined. SBCL is unique (I think) in using the empty
> list. Historically other Lisps had at least the CL package and possibly
> others in the default list.
> 
> If you want to have more predictability, provide an explicit :use nil in
> make-package or (:use) in defpackage.

Indeed, thanks for the confirmation.

A discussion related to EVAL's lack of environment object support on
#lisp reminded me that I wanted to experiment with symbolic
sandboxing.  Last night (at the time I also posted here) some
experimentation showed me that it's not difficult to implement a
restricted "safe" evaluator which can validate/convert, compile and
funcall user code without a custom interpreter or compiler).  Lisp
continues to amaze me regularily.
-- 
Matt