Re: [PATCH] Fix error prone babel table output format detection

[Eric Schulte <schulte.eric@gmail.com>]

Ian Kelling <ian@iankelling.org> writes:

> Ian Kelling <ian@iankelling.org> writes:
>> It's a bit late.  here is the same patch with correct indentation.
>
> That patch went out of it's way not to check more of the list than was
> necessary, but after sending it, I kept thinking that it does extra
> things which possibly negate any performance benefit of not checking the
> whole list. So here is a simpler patch does the same thing, but goes
> over the whole list. I'd love to hear a more experienced emacs lisper
> weigh in on which is better.
>

Hi Ian,

You should use the `org-every' function here.  Look at the source of
that function to see code to efficiently perform this sort of check.

Best,

>
> -- >8 --
> Subject: [PATCH] Fix error prone babel table output format detection
>
> * lisp/ob-core.el: Test that all elements are in a list are lists or
> 'hline instead of just the first.
>
> org-babel table output uses different formatting for a list of lists,
> but detects it incorrectly causing an error. An example of a block
> causing an error is an emacs lisp source block containing just 1 line:
> '((1) 2)
> ---
>  lisp/ob-core.el |    7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/lisp/ob-core.el b/lisp/ob-core.el
> index 1348f04..05ccb00 100644
> --- a/lisp/ob-core.el
> +++ b/lisp/ob-core.el
> @@ -2184,9 +2184,10 @@ code ---- the results are extracted in the syntax of the source
>  		 ((funcall proper-list-p result)
>  		  (goto-char beg)
>  		  (insert (concat (orgtbl-to-orgtbl
> -				   (if (or (eq 'hline (car result))
> -					   (and (listp (car result))
> -						(listp (cdr (car result)))))
> +				   (if (let ((proper t))
> +					 (dolist (elem result proper)
> +					   (unless (or (listp elem) (eq elem 'hline))
> +					     (setq proper nil))))
>  				       result (list result))
>  				   '(:fmt (lambda (cell) (format "%s" cell)))) "\n"))
>  		  (goto-char beg) (when (org-at-table-p) (org-table-align)))

-- 
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D