Re: Re: [babel] features request for Emacs Initialization

[Jonathan Arkell <jonathana@criticalmass.com>]

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Doh.

Thanks for catching that mistake.


On 2009/12/8 1:28 AM, "Sébastien Vauban" <wxhgmqzgwmuf@spammotel.com> wrote:

Hi Jonathan,

Jonathan Arkell wrote:
> On 2009/12/7 12:31 AM, "bluedian" <blue.dian@gmail.com> wrote:
>>
>> For now, I use this basic snippet when defining emacs code block in my
>> configuration files, JDL-Debug is a flag I put to true when I want to debug
>> my Emacs configuration.
>>
>> # -*- mode: snippet -*-
>> # name: code org for emacs configuration blocks
>> # key: cemacs
>> # --
>> #+srcname: $1
>> #+begin_src emacs-lisp
>> (if JDL-Debug
>>  (message "start $1"))
>> $2
>> (if JDL-Debug
>>  (message "End $1"))
>> #+end_src
>
> Why not use a macro?  That is one of the great things about lisp:
>
> (defmacro JDL-Debug (section &rest code)
>   `(if JDL-Ddebuging
>      (progn
>        (message (concat "start " ,section))
>        ,code
>        (message (concat "end " ,section)))))
>
> (I haven't tested it, but that should work.)

Not the same semantics, here: you don't execute the code unless the debug flag
is set to `t'. In his case, the debug flag just adds (or not) messages in the
echo area.

Apart from that little difference, yes, I guess using macros is an excellent
idea.

Best regards,
  Seb

--
Sébastien Vauban



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