Hello, Is there an available compiler warning when a subclass redefines an instance variable on a CLOS object? If not, would you recommend a way to avoid accidental bugs? TIA. Best Regards, Camille _______________________________________________ Lisp Hug - the mailing list for LispWorks users lisp-hug@lispworks.com http://www.lispworks.com/support/lisp-hug.html
On 25 Oct 2012, at 18:09, Camille Troillard wrote:
>
> Hello,
>
> Is there an available compiler warning when a subclass redefines an instance variable on a CLOS object?
> If not, would you recommend a way to avoid accidental bugs?
Not that I know of. This is often intentional, of course, as in something like
(defclass animal ()
((legs :initform 'uncountably-many
:initarg :legs
:reader legs)))
(defclass mammal (animal)
((legs :initform 4
:initarg :limbs
:reader limbs)))
There probably are tricks you can do with the MOP.
The simplest approach if you want to avoid unintentional name clashes is to use the package system.
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