[babel] Why #+name: is not a member of params?

[babel] Why #+name: is not a member of params?

[Mikhail Titov]

Hello!

I’d like to insert a comment into tangle output with a block name. I thought I could easily access it (like from org-babel-expand-body:XXX function) with

(cdr (assq :name params))

But apparently it does not work. When I do C-c C-v C-v trying to expand body, I get nil as it is not there.

Did I miss something?

I want that so each block appears in individual Matlab code cell [1].

[1] http://www.mathworks.com/help/techdoc/matlab_env/brqxeeu-259.html

Mikhail

Re: [babel] Why #+name: is not a member of params?

[Eric Schulte]

"Mikhail Titov" <mlt@gmx.us> writes:

> Hello!
>
> I’d like to insert a comment into tangle output with a block name. I thought I could easily access it (like from org-babel-expand-body:XXX function) with
>
> (cdr (assq :name params))
>
> But apparently it does not work. When I do C-c C-v C-v trying to expand body, I get nil as it is not there.
>
> Did I miss something?
>
> I want that so each block appears in individual Matlab code cell [1].
>
> [1] http://www.mathworks.com/help/techdoc/matlab_env/brqxeeu-259.html
>
> Mikhail
>

Hi Mikhail,

The code block name is not a member of params.  Params only holds header
arguments, not other meta data like the name.  The code block name is
stored in the `info' list which is active while the code block is being
processed, so you could access it with something like the following,
although which is relying on an implementation detail that is not part
of the formal spec (i.e., cheating) and could change.

#+name: foo
#+begin_src emacs-lisp
  (nth 4 info)
#+end_src

#+RESULTS: foo
: foo

Best,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte

Re: [babel] Why #+name: is not a member of params?

[Mikhail Titov]

> -----Original Message-----
> From: Eric Schulte [mailto:eric.schulte@gmx.com]
> Sent: Tuesday, June 05, 2012 7:42 PM
> To: Mikhail Titov
> Cc: emacs-orgmode@gnu.org
> Subject: Re: [O] [babel] Why #+name: is not a member of params?
> 
> "Mikhail Titov" <mlt@gmx.us> writes:
> 
> > Hello!
> >
> > I’d like to insert a comment into tangle output with a block name. I thought
> I could easily access it (like from org-babel-expand-body:XXX function) with
> >
> > (cdr (assq :name params))
> >
> ...
> 
> The code block name is not a member of params.  Params only holds header
> arguments, not other meta data like the name.  The code block name is
> stored in the `info' list which is active while the code block is being
> processed, so you could access it with something like the following,
> although which is relying on an implementation detail that is not part
> of the formal spec (i.e., cheating) and could change.
> 
> #+name: foo
> #+begin_src emacs-lisp
>   (nth 4 info)
> #+end_src
> 
> #+RESULTS: foo
> : foo

Thank you, Eric!

Marvelous! It does what I want. I see its definition in ob.el .

M.