Re: What's missing in ELisp that makes people want to use cl-lib?

[João Távora]

On Tue, Nov 14, 2023 at 11:11 PM Dmitry Gutov <dmitry@gutov.dev> wrote:

> Allow me to try to answer this again: special voodoo is probably not
> allowed. What the specialized methods are supposed to do is implement
> the same logic (described in the generic function's docstring) but in a
> more efficient manner.

But isn't my method just that? Let's say the methods's is simpler,
like this:

(cl-defmethod seq-contains-p ((seq my-voodoo-seq)
                                (elt (eql :secret-voodoo)) &optional _tesfn)
    ;; my-voodoo-seq always has :secret-voodoo.
    t)

Hard to be more efficient than that, right?  Then I could use

(seq-difference '(1 2 3 :secret-voodoo 5) (make-a-voodoo-seq))

And get any voodoo out.

> This is not documented,

You don't say? :-)  i think we should get started on documenting all
these ad-hoc rules (sorry but in this case they are quite literally
ad-hoc).  Better than nothing, I guess, since as to actually enforcing
them, I think that train has left the station a long time ago and is
now in a voodoo swamp in monkey island.

Anyway, I'll be back with more custom sequences soon.

João