Re: EIEIO default constructor function

[Mario Lang <mlang@blind.guru>]

Hi Stefan.

Thanks a lot.  :include is just what I was looking for.
And while `make-instance' and `slot-value' are convenient, I guess I can
work around not having them.  Having `initialize-instance' would
also have been convenient, but since I apparently only needed an :after
method I ended up using the :constructor option to rename the generated
constructor to indicate it is internal.
So it appears I can actually do without `defclass' and friends.

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Maybe I was using sloppy terminology, but as far as I can see, `cl-defstruct'
>> can not have a parent relationship, so what I call inheritance-based
>> dispatch isn't really possible with cl-defstruct?
>>
>> (defclass foo () ())
>> (cl-defmethod val ((foo foo)) 0)
>> (defclass bar (foo) ())
>> (cl-defmethod val ((bar bar)) 1)
>
>     (cl-defstruct (my-foo)
>       slot1)
>     (cl-defmethod my-val ((x my-foo)) (my-foo-slot1 x))
>     (cl-defstruct (my-bar
>                    (:include my-foo))
>       slot2)
>     (cl-defmethod my-val ((x my-bar))
>       (+ (my-bar-slot2 x) (cl-call-next-method)))
>
>      (my-val (make-my-bar :slot1 4 :slot2 5))
>      ==> 9
>
>
> -- Stefan

-- 
CYa,
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