* #+header: :post -> Symbol's value as variable is void: *this*
@ 2014-07-26 20:02 Thorsten Jolitz
2014-07-27 7:27 ` Thorsten Jolitz
0 siblings, 1 reply; 4+ messages in thread
From: Thorsten Jolitz @ 2014-07-26 20:02 UTC (permalink / raw)
To: emacs-orgmode
Hi List,
whats wrong with this :post header arg:
#+header: :post (format "#+attr_latex :float :placement {c}{scale=.6}\n%s" *this*)
#+begin_src emacs-lisp
(+ 2 2)
#+end_src
When I understand
,----
| http://orgmode.org/manual/post.html
`----
correctly, *this* should hold the block results, but I get
,----
| Symbol's value as variable is void: *this*
`----
--
cheers,
Thorsten
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: #+header: :post -> Symbol's value as variable is void: *this*
2014-07-26 20:02 #+header: :post -> Symbol's value as variable is void: *this* Thorsten Jolitz
@ 2014-07-27 7:27 ` Thorsten Jolitz
2014-08-06 4:12 ` Aaron Ecay
0 siblings, 1 reply; 4+ messages in thread
From: Thorsten Jolitz @ 2014-07-27 7:27 UTC (permalink / raw)
To: emacs-orgmode
Thorsten Jolitz <tjolitz@gmail.com> writes:
> Hi List,
>
> whats wrong with this :post header arg:
>
> #+header: :post (format "#+attr_latex :float :placement {c}{scale=.6}\n%s" *this*)
> #+begin_src emacs-lisp
> (+ 2 2)
> #+end_src
>
> When I understand
>
> ,----
> | http://orgmode.org/manual/post.html
> `----
>
> correctly, *this* should hold the block results, but I get
>
> ,----
> | Symbol's value as variable is void: *this*
> `----
This works:
#+name: myconcat
#+header: :var x=""
#+begin_src emacs-lisp
(format "Do %sx then quit" x)
#+end_src
#+header: :post myconcat(x=*this*)
#+begin_src emacs-lisp
(+ 2 2)
#+end_src
#+results:
: Do 4x then quit
but how do I interpret the following sentence from the manual:
,----
| This variable [*this*] may then be included in header argument forms
| such as those used in var header argument specifications allowing
| passing of results to other code blocks, or direct execution via Emacs
| Lisp.
`----
What is meant by 'direct execution via Emacs Lisp' here? I think the
above construct with two src-blocks is a bit heavy for the rather small
task and hoped I could just give an Emacs Lisp expression containing
*this* as value to the :post header arg, but apparently not?
#+header: :post (format "Do %sx then quit" *this*)
#+begin_src emacs-lisp
(+ 2 2)
#+end_src
-> eval: Symbol's value as variable is void: *this*
--
cheers,
Thorsten
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: #+header: :post -> Symbol's value as variable is void: *this*
2014-07-27 7:27 ` Thorsten Jolitz
@ 2014-08-06 4:12 ` Aaron Ecay
2014-08-06 8:54 ` Thorsten Jolitz
0 siblings, 1 reply; 4+ messages in thread
From: Aaron Ecay @ 2014-08-06 4:12 UTC (permalink / raw)
To: Thorsten Jolitz, emacs-orgmode
Hi Thorsten,
2014ko uztailak 27an, Thorsten Jolitz-ek idatzi zuen:
>
> Thorsten Jolitz <tjolitz@gmail.com> writes:
>
>> Hi List,
>>
>> whats wrong with this :post header arg:
>>
>> #+header: :post (format "#+attr_latex :float :placement {c}{scale=.6}\n%s" *this*)
>> #+begin_src emacs-lisp
>> (+ 2 2)
>> #+end_src
>>
>> When I understand
>>
>> ,----
>> | http://orgmode.org/manual/post.html
>> `----
>>
>> correctly, *this* should hold the block results, but I get
>>
>> ,----
>> | Symbol's value as variable is void: *this*
>> `----
>
>
> This works:
>
> #+name: myconcat
> #+header: :var x=""
> #+begin_src emacs-lisp
> (format "Do %sx then quit" x)
> #+end_src
>
>
> #+header: :post myconcat(x=*this*)
> #+begin_src emacs-lisp
> (+ 2 2)
> #+end_src
>
> #+results:
> : Do 4x then quit
>
>
> but how do I interpret the following sentence from the manual:
>
> ,----
> | This variable [*this*] may then be included in header argument forms
> | such as those used in var header argument specifications allowing
> | passing of results to other code blocks, or direct execution via Emacs
> | Lisp.
> `----
>
> What is meant by 'direct execution via Emacs Lisp' here? I think the
> above construct with two src-blocks is a bit heavy for the rather small
> task and hoped I could just give an Emacs Lisp expression containing
> *this* as value to the :post header arg, but apparently not?
>
> #+header: :post (format "Do %sx then quit" *this*)
> #+begin_src emacs-lisp
> (+ 2 2)
> #+end_src
>
> -> eval: Symbol's value as variable is void: *this*
The value of :post should be a babel call (in the same format as e.g. a
#+call line), not an elisp form. If babel sees something that looks
like elisp, it will attempt to ‘eval’ it when parsing the src block,
before *this* is bound (which happens only upon execution, after
parsing).
--
Aaron Ecay
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: #+header: :post -> Symbol's value as variable is void: *this*
2014-08-06 4:12 ` Aaron Ecay
@ 2014-08-06 8:54 ` Thorsten Jolitz
0 siblings, 0 replies; 4+ messages in thread
From: Thorsten Jolitz @ 2014-08-06 8:54 UTC (permalink / raw)
To: emacs-orgmode
Aaron Ecay <aaronecay@gmail.com> writes:
Hi Aaron,
> 2014ko uztailak 27an, Thorsten Jolitz-ek idatzi zuen:
>>
>> Thorsten Jolitz <tjolitz@gmail.com> writes:
>>
>>> Hi List,
>>>
>>> whats wrong with this :post header arg:
>>>
>>> #+header: :post (format "#+attr_latex :float :placement
>>> {c}{scale=.6}\n%s" *this*)
>>> #+begin_src emacs-lisp
>>> (+ 2 2)
>>> #+end_src
>>>
>>> When I understand
>>>
>>> ,----
>>> | http://orgmode.org/manual/post.html
>>> `----
>>>
>>> correctly, *this* should hold the block results, but I get
>>>
>>> ,----
>>> | Symbol's value as variable is void: *this*
>>> `----
>>
>>
>> This works:
>>
>> #+name: myconcat
>> #+header: :var x=""
>> #+begin_src emacs-lisp
>> (format "Do %sx then quit" x)
>> #+end_src
>>
>>
>> #+header: :post myconcat(x=*this*)
>> #+begin_src emacs-lisp
>> (+ 2 2)
>> #+end_src
>>
>> #+results:
>> : Do 4x then quit
>>
>>
>> but how do I interpret the following sentence from the manual:
>>
>> ,----
>> | This variable [*this*] may then be included in header argument forms
>> | such as those used in var header argument specifications allowing
>> | passing of results to other code blocks, or direct execution via Emacs
>> | Lisp.
>> `----
>>
>> What is meant by 'direct execution via Emacs Lisp' here? I think the
>> above construct with two src-blocks is a bit heavy for the rather small
>> task and hoped I could just give an Emacs Lisp expression containing
>> *this* as value to the :post header arg, but apparently not?
>>
>> #+header: :post (format "Do %sx then quit" *this*)
>> #+begin_src emacs-lisp
>> (+ 2 2)
>> #+end_src
>>
>> -> eval: Symbol's value as variable is void: *this*
>
> The value of :post should be a babel call (in the same format as e.g. a
> #+call line), not an elisp form. If babel sees something that looks
> like elisp, it will attempt to ‘eval’ it when parsing the src block,
> before *this* is bound (which happens only upon execution, after
> parsing).
Thats
#+CALL: <name>(<arguments>)
then, and looks like the headerline of the working example above:
#+header: :post myconcat(x=*this*)
Then there is no way to achieve what I had in mind. Thx.
--
cheers,
Thorsten
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-08-06 8:55 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2014-07-26 20:02 #+header: :post -> Symbol's value as variable is void: *this* Thorsten Jolitz
2014-07-27 7:27 ` Thorsten Jolitz
2014-08-06 4:12 ` Aaron Ecay
2014-08-06 8:54 ` Thorsten Jolitz
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