From: lisping-forever
Subject: DEFCLASS :metaclass structure-class in Allegro
Date: Sun, 20 Feb 2005 22:51:47 +0000
Message-ID: <1108939907.602505.228420@o13g2000cwo.googlegroups.com>

Does anyone know how to define subclasses of structure-classes
as in the example:

(defclass foo ()
    ((a :initarg :a :accessor a))
  (:metaclass structure-class))

This defclass is fine in CMUCL, but fails in Allegro 6.2 with the
error:

:DIRECT-SUPERCLASSES :DIRECT-SLOTS are invalid initargs to
make-instance of class #<STANDARD-CLASS STRUCTURE-CLASS>. The valid
initargs are :PLIST :NAME.

From: Rahul Jain
Subject: Re: DEFCLASS :metaclass structure-class in Allegro
Date: Mon, 21 Feb 2005 05:52:03 +0000
Message-ID: <87ll9ia29o.fsf@nyct.net>

"lisping-forever" <····@ai.sri.com> writes:

> This defclass is fine in CMUCL, but fails in Allegro 6.2 with the
> error:
>
> :DIRECT-SUPERCLASSES :DIRECT-SLOTS are invalid initargs to
> make-instance of class #<STANDARD-CLASS STRUCTURE-CLASS>. The valid
> initargs are :PLIST :NAME.

The behavior (initargs, slots, etc) of STRUCTURE-CLASS is unspecified.

-- 
Rahul Jain
·····@nyct.net
Professional Software Developer, Amateur Quantum Mechanicist