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Variable ignored warning in defsetf?
- To: firstname.lastname@example.org
- Subject: Variable ignored warning in defsetf?
- From: email@example.com (Bob Hall)
- Date: Tue, 31 Jan 95 10:11:23 EST
- Cc: firstname.lastname@example.org
- In-reply-to: Doug Currie, Flavors Technology, Inc.'s message of Tue, 31 Jan 1995 09:47:02 -0500 <email@example.com>
- Sender: firstname.lastname@example.org
Date: Tue, 31 Jan 1995 09:47:02 -0500
From: email@example.com (Doug Currie, Flavors Technology, Inc.)
At 3:20 PM 95.01.27, Peter Norvig wrote:
>A user of my code complains that the following generates the error
> Variable CONTAINED? not ignored, in an anonymous lambda form
>under MCL. Other Lisps don't complain. Is there some work-around, or
>some way to tell MCL not to promote such warnings into an error that
>stops the compilation process?
>(defsetf grid-contents (env loc &optional contained?) (val)
> (declare (ignore contained?))
> `(setf (aref (grid-environment-grid ,env)
> (floor (xy-x ,loc)) (floor (xy-y ,loc)))
try: (declare (ignore-if-unused contained?))
See MCL Ref p. 643
This may then cause the other Lisps to barf, being a nonstandard declaration.
Some Lisps have an IGNORABLE declaration, some have IGNORE-IF-UNUSED, etc.
#-:MCL (declare (ignore contained?))
in the original code instead?