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- Subject: ex
- From: email@example.com (Pete Halverson)
- Date: Fri, 28 May 1993 14:19:09 GMT
In article <1993May26.firstname.lastname@example.org> email@example.com writes:
>Sorry if my fist try now gets through.
Sounds painful. I usually try and use a sledgehammer for postings, myself :-)
>I am trying to find how to export everything from a package. If a package is
>made at the top level
>this now has all the function of the top level lisp. If instead it is set to
>use a different package
>(defpackage "TEST" (:use "TEST-1"))
>It now only has the functions being exported from TEST-1. I would like it
>also to have all the lisp functions as well. sort of
>(defpackage "TEST" (:USE "TEST-1" "CL-USER"))
You almost got it right with your last line. Check CLTL2 (p. 271) or your
vendor's Lisp documentation for details, but basically:
In DEFPACKAGE, if you don't specify a :USE option, the package is defined
to :USE some default set of packages; the exact set is
implementation-specific, but usually includes "COMMON-LISP" and,
occasionally, a vendor's specific extension package (e.g. "LCL" for Lucid,
"EXCL" for Allegro). However, if you do specify a :USE option, your new
package :USE's *only* those packages you indicate; it does *not* include
the defaults as well. If you also want to :USE the defaults, you must
specify them explicitly.
The problem, of course, is knowing what the default :USE'd packages are.
Since this is is explicitly left unspecified by the standard, I can't tell
you what these ought to be (particularly since I don't know your Lisp
implementation), but you can find out yourself by creating a dummy package
with a default :USE list
> (defpackage "JUNK")
#<The JUNK package>
and then examining its :USE'd packages
> (package-use-list "JUNK")
(#<The COMMON-LISP package>) ;; or whatever
You can then :USE these packages yourself when declaring your package
> (defpackage "TEST" (:USE "TEST-1" "COMMON-LISP"))
The reason your :USE of "CL-USER" didn't work is that "CL-USER" probably
doesn't export the symbols it imports from "COMMON-LISP".
Note that CLTL2 suggests that "portable code should specify (:use
'("COMMON-LISP")) explicitly.", so that your code doesn't quietly depend on
the presence of some default implementation-specific package.
Hope this makes sense.
Pete Halverson INET: firstname.lastname@example.org
GE Corporate R&D Center UUCP: uunet!crd.ge.com!halverson