[cl-ppcre-devel] using cl-ppcre functions without package prefixes

Thu Jan 10 20:20:40 UTC 2008

I'm partial to the book "Successful Lisp" but neither book covers ASDF. 
This tutorial was of great help in the past:
http://common-lisp.net/~mmommer/asdf-howto.shtml

but it is not quite helping me enough here. In both Case 1 and Case 2 
below, my .sbclrc does not change, yet Case 2 works just fine. I would 
like to be able to do an asdf load on bank-match and have it pull-in 
cl-ppcre, but as it stands I must manually load it first.

(setf asdf:*central-registry*
      '(
        ;;
        *default-pathname-defaults* 
        ;;; 
        #P"C:\\cygwin\\home\\W049945\\prg\\lisp-asdf\\series-2.2.9\\"
        #P"C:\\cygwin\\home\\W049945\\prg\\lisp-asdf\\cl-ppcre-1.3.2\\"
        #P"C:\\cygwin\\home\\W049945\\prg\\redick\\lisp\\"
        #P"C:\\etl\\y.com\\trunk\\zan\\approximate-matching\\src\\lisp\\"
        ))

Case 1: attempt to load cl-ppcre via my defpackage: throw error 'The name 
"CL-PPCRE" does not designate any package.'

relevant source:

(defpackage :bank-match
  (:use :cl :asdf :cl-ppcre)
  )

(in-package :bank-match)

(asdf:defsystem bank-match
    :description "Approximate bank matching"
    :author "Terrence M. Brannon"
    :maintainer "Terrence M. Brannon"
    :licence "Artistic"
    :version "1.0"
    :serial t
    :components (
                 (:file "clean")
                 )
    )

(progn
  (declaim (optimize (debug 3) (safety 3))) 
  (asdf:operate 'asdf:load-op 'bank-match))

Case 2: load cl-ppcre manually and then attempt to load my bank-match 
package using a simple asdf call => works just fine
symbols:   BANK-MATCH::OPTIMIZE, COMMON-LISP:OPTIMIZE

;;;; (asdf:operate 'asdf:load-op 'cl-ppcre) ...
; loading system definition from
; C:\cygwin\home\W049945\prg\lisp-asdf\cl-ppcre-1.3.2\cl-ppcre.asd into
; #<PACKAGE "ASDF0">
; registering #<SYSTEM :CL-PPCRE {B1BA4C1}> as CL-PPCRE

;;;; (asdf:operate 'asdf:load-op 'bank-match) ...
; loading system definition from
; 
c:\etl\aml-ntdb-uat-02.ny.jpmorgan.com\trunk\zan\approximate-matching\src\lisp\bank-match.asd
; into #<PACKAGE "ASDF0">
; registering #<SYSTEM BANK-MATCH {ABCC439}> as BANK-MATCH
;;;; (asdf:operate 'asdf:load-op 'cl-ppcre) ...
;;;; (asdf:operate 'asdf:load-op 'bank-match) ...

--
Terrence Brannon - SID W049945
614-213-2475 (office)
614-213-3426 (fax)
818-359-0893 (cell)

Edi Weitz <edi at agharta.de> 
Sent by: cl-ppcre-devel-bounces at common-lisp.net
01/04/2008 05:43 PM
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Subject
Re: [cl-ppcre-devel] using cl-ppcre functions without package prefixes

On Fri, 4 Jan 2008 17:20:41 -0500, terrence.x.brannon at jpmchase.com wrote:

> Hello, I know this is more of just a pure Lisp question, but i
> cannot figure out how to get my Lisp program to use cl-ppcre without
> having to prefix the function calls with 'cl-ppcre'

Your technical question was answered already, but I suspect (I may be
wrong, of course) that you make the same mistake many Lisp newbies
make - you're confusing packages and systems.  A "package" is a
first-class Lisp object defined in the ANSI standard.  You can read
about it here for example:

http://gigamonkeys.com/book/programming-in-the-large-packages-and-symbols.html

(Read the whole book if you haven't done so already.)

A "system" (that's a common usage of the name although there's no
fixed definition for it) is something that's defined by a defsystem
facility like ASDF - it's more or less a collection of source files
plus instructions on how they are to be compiled.

Very often there's a system and a package of the same name, like it's
the case for CL-PPCRE.  That doesn't have to be the case, though.  The
names could be different, one system could define more than one
package or no package at all, you can define a package without
defining a system, etc.

HTH,
Edi.
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