From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
To: Yasushi SHOJI <yashi@atmark-techno.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: limitation for macro expansion
Date: Mon, 06 Mar 2017 09:22:35 +0100 [thread overview]
Message-ID: <87shmq4xx0.fsf@nicolasgoaziou.fr> (raw)
In-Reply-To: <87pohvqiai.wl@dns1.atmark-techno.com> (Yasushi SHOJI's message of "Mon, 06 Mar 2017 10:56:53 +0900")
Hello,
Yasushi SHOJI <yashi@atmark-techno.com> writes:
> Ah, you mean the parser is unable to distinguish the macro and
> subscript?
It's not the parser, but the syntax. Subscript is
a_{...}
whereas macro is
{{{macro(...)}}}
so, when you see
a_{{{something}}}
there are two ways to interpret it: the one you expect and
a_{CONTENTS} where CONTENTS is {{something}}.
Since subscript syntax started first, it has precedence over the macro.
> Doesn't seems to work. When I export 'a_{{{{author}}}}', it
> generates:
>
> a_{Yasushi SHOJI}
>
> I was expecting to see:
>
> a_Yasushi SHOJI
This is correct if you use `ascii' back-end. How could you tell the
difference between
a_{Yasushi SHOJI}
and
a_Yasushi SHOJI
otherwise?
OTOH, `latex' back-end produces
a\(_{\text{Yasushi SHOJI}}\)
which means the parser and the export process correctly handle it.
>> > - Link doesn't work like this: [[file:{{{input-file}}}][Bad link]]
>>
>> Indeed. This kind of link is not supported as you cannot follow it
>> (macros are an export-only feature).
>
> Hmm, that's true that you can't follow it.
>
> Would it be OK to say that it's a design decision to ignore the macro
> expansion in the link field at export time?
It is. Actually, macros are not allowed in many places, as a design
decision. See
(info "(org) Macro replacement")
for more details.
>> Feel free to provide a documentation patch if you think this needs to be
>> made explicit.
>
> Will do once I fully understand.
>
> Now, what I'm trying to achieve with a macro is to generate a
> filename-like string with a timestamp in it in my doc.
>
> ie)
>
> #+MACRO: timestamp {{{date(%Y%m%d)}}}
>
> Please open log_{{{timestamp}}}.txt
>
> Would it be possible for org to do this?
You could try
#+MACRO: timestamp {{{time(%Y%m%d)}}}
Please open log\under{}{{{timestamp()}}}.txt
> If not, would it be possible for me to modify the code to achieve this?
> My stupid idea is to:
>
> - disable sub / superscript parser when org-use-sub-superscripts is nil
See `org-export-with-sub-superscripts'.
> - reverse the precedence order of subscript and macro
This would only move the problem elsewhere.
Regards,
--
Nicolas Goaziou 0x80A93738
next prev parent reply other threads:[~2017-03-06 8:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-04 9:58 limitation for macro expansion Yasushi SHOJI
2017-03-05 10:58 ` Nicolas Goaziou
2017-03-06 1:56 ` Yasushi SHOJI
2017-03-06 8:22 ` Nicolas Goaziou [this message]
2017-03-06 9:28 ` Yasushi SHOJI
2017-03-06 16:41 ` Nicolas Goaziou
2017-03-07 6:18 ` Yasushi SHOJI
2017-03-08 11:30 ` Nicolas Goaziou
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.orgmode.org/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87shmq4xx0.fsf@nicolasgoaziou.fr \
--to=mail@nicolasgoaziou.fr \
--cc=emacs-orgmode@gnu.org \
--cc=yashi@atmark-techno.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).