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Re: [O] nested macro expansion?

From: Eric Abrahamsen
Subject: Re: [O] nested macro expansion?
Date: Wed, 19 Aug 2015 23:03:36 +0800
User-agent: Gnus/5.130014 (Ma Gnus v0.14) Emacs/25.0.50 (gnu/linux)

On 08/19/15 14:43 PM, Pip Cet wrote:
> Hi Eric,
> I know this doesn't answer your actual question about nested macro
> expansion, but writing some elisp might help you get the TIMESTAMP
> property, at least: both
> #+MACRO: bubba (eval (org-entry-get nil "TIMESTAMP"))
> and
> #+MACRO: bubba (eval (org-macro-expand "{{{property(TIMESTAMP)}}}"
> org-macro-templates))
> appear to produce the current timestamp, and both can be fed to
> another function, but not `format-time-string': the result of
> (org-entry-get...) is a string of the form "<2014-08-19>", which would
> need to be passed to `org-parse-time-string' first.

Hey, that does the trick, thank you! I guess I should have thought of

Sure, the example as I gave it would have errored had it done anything,
but the main thing was just getting the right values in the right place.
Off to write the function...

Thanks again,

> On 8/19/15, Eric Abrahamsen <address@hidden> wrote:
>> Eric Abrahamsen <address@hidden> writes:
>>> What I'm trying to do is have a macro that takes the computed TIMESTAMP
>>> property for an entry, and then runs it through a custom function that
>>> breaks out the start/end times, and produces a nicely formatted string
>>> from that.
>>> I don't see how to write a macro that feeds the value of a computed
>>> special property to a function.
>>> Right now my testing version looks like this:
>>> #+MACRO: bubba (eval (format-time-string "%Y" "$1"))
>>> and I'm calling it like this:
>>> {{{bubba({{{property(TIMESTAMP)}}})}}}
>>> That doesn't expand the interior "{{{property(TIMESTAMP)}}}" clause.
>>> What `format-time-string' ends up seeing is "{{{property(TIMESTAMP",
>>> without the final braces etc.
>>> Is there any way to get that value expanded first, and then passed to
>>> `format-time-string' (or, eventually, my custom function)?
>> After googling for a while, I also thought this might work:
>> #+MACRO: bubba (eval (format-time-string "%Y" property{{{TIMESTAMP}}}))
>> {{{bubba}}}
>> But the nested definition isn't expanded, either with or without quotes.
>> E

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