CLIM 2.0, pane names

• Subject: CLIM 2.0, pane names
• From: Andrew Philpot <philpot@ptolemy.arc.nasa.gov>
• Date: Thu, 3 Dec 1992 21:19:18 GMT
• Newsgroups: fi.clim
• Organization: NASA/ARC Information Sciences Division
• Sender: "Will Edgington, wedgingt@ptolemy.arc.nasa.gov" <usenet@ptolemy.arc.nasa.gov>

Environment: CLIM 2.0, Beta, Franz Allegro 4.2.beta.0, Sparc 2.

Hello.  I have just received a beta version of CLIM 2.0.  I am making
my application run under 2.0.  I am using as documentation the "Common
Lisp Interface Manager Release 2.0 Specification" of May 6, 1992.

I can't find anything in this documentation that says that pane names
(symbols) in the :PANES argument to DEFINE-APPLICATION-FRAME shouldn't
be symbols in the COMMON-LISP package.  The messages my compiler is
emitting seem to indicate this, though.  The following bit of code
causes a warning that the code is non-portable because it used the
symbol CL:TRACE (inherited) as a pane name.  It appears that pane
names are being turned into symbol-macros via SYMBOL-MACROLET and it's
wrong for portable code to make symbol-macro definitions with the same
name as CL base symbols.

Is it the intent for users to have to carefully cull out lots of
useful symbols like CONDITION, WARNING, DRIBBLE, TRACE, TYPE, CLASS,
EXPORT, FUNCTION, CONSTANTLY :-) as pane names because of this
conflict> If so, I guess the documentation should make this explicit.

Or is it the case that the compiler is overly anxious here (since it
would be hard for a symbol-macro to interfere with any of the
semantics of these symbols)?

For now I'm avoiding these symbols and languishing in the world of
non-portability...

;; --------------- code fragment starts here ---------------

;;; -*- Mode:Lisp; Syntax:Common-Lisp; Package:CLIM-USER; Base:10 -*-

(in-package :clim-user)

#+CLIM-2
(define-application-frame test-frame (application-frame)
  ()
  (:panes
    (trace :application)
    )
  (:layouts 
   (default 
	(:vertically ()
		     trace)
	)
   )
  )

;; --------------- replay of warning message ---------------

Warning: Compiling a SYMBOL-MACROLET definition for the name TRACE.
This name is in the COMMON-LISP package and defining it will be a
violation for portable programs.  The package COMMON-LISP has
EXCL:PACKAGE-DEFINITION-LOCK set, which causes the system to check for
this violation. 

Andrew
-- 
---------------------------------------------------------------
		     philpot@ptolemy.arc.nasa.gov


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