Re: &allow-other-keys + &rest body in cl-defmacro (was: Permanently fix org versioning breakage during builds?)

[Ihor Radchenko]

João Távora <joaotavora@gmail.com> writes:

>> Now I feel a bit like RMS when he complained about CL-lib introducing
>> alien concepts to Elisp :)
>
> It's not Cl-lib's fault that the Org developers made a mistake and didn't
> understand how the Common Lisp tool they selected works.

I do not blame cl-lib. Mostly grumbling on unexpected concept that is
hard to grasp even after reading the manual (maybe, the manual could be
improved).

> Even in Elisp a zillion macros are correctly written in this form:
>
>   (defmacro with-foo (options-when-fooing &rest body)
>
> It's exactly the same, only you need to do the destructuring yourself.
> cl-defmacro simplifies this for free with
>
>   (cl-defmacro with-foo ((&key option1 option2) &body body)

It would be nice if this approach were described in the manual.
Now, there is just description of destructuring, but it is very generic.

>> What about non-breaking change like the attached?
>
> You should be checking for `keywordp` instead, because &allow-other-keys.

The only reason I used &allow-other-keys is that I couldn't use &rest
without specifying &allow-other-keys.
(I did not know about ((&key ...) &rest body) trick when writing this macro.)

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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