Re: Lambdas for beginners broken - help, please

[tpeplt <tpeplt@gmail.com>]

Michael Heerdegen via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

> tpeplt <tpeplt@gmail.com> writes:
>
>>    This matches the (soon to be out of date?) behavior documented in 
>>    (info "(elisp) Function Cells").
>
> I don't follow - what has to be changed in (info "(elisp) Function
> Cells")?  Stefan had updated that node along with the introduction of
> the new function type.
>
> Michael.
>
>

I do not have a version of Emacs built from the latest development
sources, but according to the OP:

>
> the current info manual says this,
>
>   (defun bar (n) (+ n 2))
>   (symbol-function 'bar)
>     ;; -> #f(lambda (n) [t] (+ n 2))
>
> and if I run the code myself(*) I get this:
>
>   (defun bar (n) (+ n 2))
>   (symbol-function 'bar)
>     ;; -> #[(n) ((+ n 2)) nil]
>

If what is written by the OP correctly describes what happens with the
latest development sources, then the description in the manual:

>  #f(lambda (n) [t] (+ n 2))

is not the same as what comes from evaluation:

>   #[(n) ((+ n 2)) nil]

However, it was not clear (to me) that the OP was evaluating the
expressions with ‘lexical-binding’ set to T or NIL, which would affect
the evaluation result.

Also, my reply was meant to help illustrate that Emacs 29 does not show
the discrepancy between documentation and evaluation that the OP
describes.  Does this make his question more appropriate for the
‘emacs-devel’ mailing list?

-- 
The lyf so short, the craft so long to lerne.
- Geoffrey Chaucer, The Parliament of Birds.