Re: Short functions

[Daniel Colascione <dancol@dancol.org>]

On January 6, 2025 12:02:43 PM EST, "Daniel Mendler via Emacs development discussions." <emacs-devel@gnu.org> wrote:
>Stefan Monnier <monnier@iro.umontreal.ca> writes:
>
>>> There is also a lack in some combinators (flip, curry, uncurry, ...)
>>> which are occasionally useful. Also papply and rpapply, since
>>> apply-partially lacks conciseness and sometimes one wants apply the
>>> arguments to the right. Same with cl-constantly.
>>>
>>> (papply #'f x)
>>> (apply-partially #'f x)
>>> (lambda (y) (f x y))
>>> (lambda (y z) (f x y z))
>>>
>>> (lambda (_) x)
>>> (constantly x)
>>> (lambda (_ _) x)
>>> (cl-constantly x)
>>
>> I think you're arguing for something like `llama`s ## or to expand #'
>> to allow things like:
>
>Actually I like the explicitly named combinators (constantly, identity,
>papply, etc). Nevertheless some Llama-style syntax would be nice to have
>in Elisp. It doesn't have to reuse the #' syntax.

Sure, but it'd be nice to maintain the syntactic structure of current code instead of, say, introducing new punctuation. I used to be upset that we don't have reader macros. Now I'm not.

>
>> I'm interested to add new meanings to `function` (aka #') but mostly for
>> things like
>>
>>     #'(setf foo)
>>     #'(peg foo)
>>
>> to refer to the setters or the peg-matchers of a given name.  It could
>> also be used for
>
>Good idea.
>
>Daniel
>