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Re: `print' inside Emacs vs `print' to stdout (with Emacsclient)


From: Thorsten Jolitz
Subject: Re: `print' inside Emacs vs `print' to stdout (with Emacsclient)
Date: Wed, 23 Oct 2013 12:24:40 +0200
User-agent: Gnus/5.130002 (Ma Gnus v0.2) Emacs/24.3 (gnu/linux)

Thorsten Jolitz <address@hidden> writes:

Hi List, 

> What I would really need is being able to just `print' a structure to
> stdout in an emacsclient call and receive as input of another program on
> stdin exactly what would be printed in the Emacs *Messages* buffer when
> evaluating the print commands in an emacs-lisp-mode buffer.
>
> Is there any way to achieve this?

following up to my own post, I wonder how printing does work in the
*Messages* buffer?

Looking at the examples below, I see that - with `print-circle' set to t
- `print' and `(message "%S" ...)' produce the output I want to receive
in another program. And what I want is the first part of the output, the
unquoted lisp structure, not the second (string) part. 

I wonder how this first part (the return value of
`org-element-parse-buffer' I would guess) is captured and printed
unquoted in the *Messages* buffer _with_ the 'circular' labels and
references?

To send something via stdout to another program, one must print
something, so what I receive in the other program is always the the
output - either unquoted but without the 'circular' labels and
references, or quoted and including them.

How can I send the raw lisp structure with print-circle information
to another program (instead of a string)?

###################################

    ,-------------------------------
    | (print 
    |  (org-element-parse-buffer))))
    `-------------------------------

#2=(org-data nil #1=(headline (:raw-value "A" :begin 1 :end 7 :pre-blank
 0 :hiddenp outline :contents-begin 5 :contents-end 7 :level 1 :priority
 nil :tags nil :todo-keyword nil :todo-type nil :post-blank 0
 :footnote-section-p nil :archivedp nil :commentedp nil :quotedp nil
 :CATEGORY nil :title (#("A" 0 1 (:parent #1#))) :parent #2#)
 #3=(section (:begin 5 :end 7 :contents-begin 5 :contents-end 7
 :post-blank 0 :parent #1#) #4=(paragraph (:begin 5 :end 7
 :contents-begin 5 :contents-end 7 :post-blank 0 :post-affiliated 5
 :parent #3#) #("B\n" 0 2 (:parent #4#))))))

(org-data nil (headline (:raw-value "A" :begin 1 :end 7 :pre-blank 0
:hiddenp outline :contents-begin 5 ...) (section (:begin 5 :end 7
:contents-begin 5 :contents-end 7 :post-blank 0 :parent #1) (paragraph
... #("B " 0 2 ...)))))

##################################

    ,-------------------------------
    | (message "%S"
    |  (org-element-parse-buffer))))
    `-------------------------------

#2=(org-data nil #1=(headline (:raw-value "A" :begin 1 :end 7 :pre-blank
 0 :hiddenp outline :contents-begin 5 :contents-end 7 :level 1 :priority
 nil :tags nil :todo-keyword nil :todo-type nil :post-blank 0
 :footnote-section-p nil :archivedp nil :commentedp nil :quotedp nil
 :CATEGORY nil :title (#("A" 0 1 (:parent #1#))) :parent #2#)
 #3=(section (:begin 5 :end 7 :contents-begin 5 :contents-end 7
 :post-blank 0 :parent #1#) #4=(paragraph (:begin 5 :end 7
 :contents-begin 5 :contents-end 7 :post-blank 0 :post-affiliated 5
 :parent #3#) #("B\n" 0 2 (:parent #4#))))))

"#2=(org-data nil #1=(headline (:raw-value \"A\" :begin 1 :end 7
:pre-blank 0 :hiddenp outline :contents-begin 5 :contents-end 7 :level 1
:priority nil :tags nil :todo-keyword nil :todo-type nil :post-blank 0
:footnote-section-p nil :archivedp nil :commentedp nil :quotedp nil
:CATEGORY nil :title (#(\"A\" 0 1 (:parent #1#))) :parent #2#)
#3=(section (:begin 5 :end 7 :contents-begin 5 :contents-end 7
:post-blank 0 :parent #1#) #4=(paragraph (:begin 5 :end 7
:contents-begin 5 :contents-end 7 :post-blank 0 :post-affiliated 5
:parent #3#) #(\"B\\n\" 0 2 (:parent #4#))))))"


##################################

    ,-------------------------------
    | (message "%s"
    |  (org-element-parse-buffer))))
    `-------------------------------

#2=(org-data nil #1=(headline (:raw-value A :begin 1 :end 7 :pre-blank 0
:hiddenp outline :contents-begin 5 :contents-end 7 :level 1 :priority
nil :tags nil :todo-keyword nil :todo-type nil :post-blank 0
:footnote-section-p nil :archivedp nil :commentedp nil :quotedp nil
:CATEGORY nil :title (A) :parent #2#) #3=(section (:begin 5 :end 7
:contents-begin 5 :contents-end 7 :post-blank 0 :parent #1#)
#4=(paragraph (:begin 5 :end 7 :contents-begin 5 :contents-end 7
:post-blank 0 :post-affiliated 5 :parent #3#) B ))))

"#2=(org-data nil #1=(headline (:raw-value A :begin 1 :end 7 :pre-blank
0 :hiddenp outline :contents-begin 5 :contents-end 7 :level 1 :priority
nil :tags nil :todo-keyword nil :todo-type nil :post-blank 0
:footnote-section-p nil :archivedp nil :commentedp nil :quotedp nil
:CATEGORY nil :title (A) :parent #2#) #3=(section (:begin 5 :end 7
:contents-begin 5 :contents-end 7 :post-blank 0 :parent #1#)
#4=(paragraph (:begin 5 :end 7 :contents-begin 5 :contents-end 7
:post-blank 0 :post-affiliated 5 :parent #3#) B ))))"

####################################

-- 
cheers,
Thorsten




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