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From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
To: fm4d <m@fm4d.net>
Cc: emacs-orgmode@gnu.org
Subject: Re: [BUG] Noweb reference eval syntax does not work
Date: Sun, 08 May 2016 11:26:31 +0200	[thread overview]
Message-ID: <87shxsaojc.fsf@saiph.selenimh> (raw)
In-Reply-To: <87h9ec2ngz.fsf@fm4d.net> (fm4d's message of "Thu, 05 May 2016 23:39:56 +0200")

Hello,

fm4d <m@fm4d.net> writes:

> The noweb reference syntax that should insert results of
> evaluation of src block itself instead of src block as
> described in `org-babel-expand-noweb-reference` does not
> seems to work.
>
>
> Code for replication:
>
> * Assign 
>
> First we assign abc:
>
> #+begin_src python :noweb-ref assign_abc
> abc = "abc" + "def"
> #+end_src
>
> * Use
>
> Then we use it in a function:
>
> #+begin_src python :noweb tangle :tangle noweb-test.py
> def x():
>   <<assign_abc>>
>   return abc
>
> print(x())
> #+end_src
>
>
> <<assign_abc>> does work, <assign_abc()> fails with this error:
>
> (error "Reference ‘assign_abc’ not found in this buffer")
>   signal(error ("Reference ‘assign_abc’ not found in this buffer"))
>   error("Reference `%s' not found in this buffer" "assign_abc")
>   org-babel-ref-resolve("assign_abc()")
>   ...
>
>
> I am not sure if this is a bug or I am doing something wrong,
> the documentation on this feature is not very comprehensive.

I just discovered the :noweb-ref parameter.

It is redundant with #+NAME: keyword and slightly broken. Also it
induces hacks like `org-babel-use-quick-and-dirty-noweb-expansion' to
work-around its shortcomings. 

Besides, it doesn't make much sense to add the same parameters to
a bunch of blocks, so I find the syntax dubious.

I understand it can be a handy shortcut for inserting multiple blocks,
but, all in all, I tend to think it would be simpler to just remove the
feature, along with `:noweb-sep' and
`org-babel-use-quick-and-dirty-noweb-expansion'.

What do you, and others, think? Is NAME enough for noweb syntax, or is
there a real need fo :noweb-ref?


Regards,

-- 
Nicolas Goaziou

next prev parent reply	other threads:[~2016-05-08  9:27 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-05 21:39 [BUG] Noweb reference eval syntax does not work fm4d
2016-05-08  9:26 ` Nicolas Goaziou [this message]
2016-05-08 12:57   ` Rasmus
2016-05-08 16:32     ` Thomas S. Dye
2016-05-11 21:34       ` Nicolas Goaziou
2016-05-11 22:40         ` Samuel Wales
2016-05-11 23:19         ` Charles C. Berry
2016-05-12 23:35     ` Aaron Ecay
2016-05-15 22:40       ` Nicolas Goaziou
  -- strict thread matches above, loose matches on Subject: below --
2016-08-04 21:11 Karsten Schmidt
2016-08-05  2:25 ` Charles C. Berry

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