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Re: Macro pre-processing?

From: Mats Bengtsson
Subject: Re: Macro pre-processing?
Date: Thu, 06 Apr 2006 22:17:22 +0200
User-agent: Internet Messaging Program (IMP) H3 (4.0.4)

Just read sections 11.1.3 and 11.1.6 in the manual.


Quoting Carrick Patterson <address@hidden>:

If somehow you find an answer to this and it doesn't make the list, I wish
you'd post it. I can think of a million uses for being able to pass a
variable to a function on the fly, and never have figured out how to do it
without having a second variable that is actual notes included and putting
the whole thing around curly brackets. Just to be able to pass a padding
parameter to a user-written function for spacing, say, rehearsal marks would
be a great timesaver.

From: "Geoff Horton" <address@hidden>
Date: Thu, 6 Apr 2006 11:57:44 -0400
To: "Lilypond mailing list" <address@hidden>
Subject: Macro pre-processing?

I guess I should start by explaining what I want to do. I have a lot
of notes in chords whose noteheads need to be individually \tweak-ed
to be smaller. Always on the lookout to reduce typing (and thus
typos), I tried:

organ = { \tweak "'font-size #-2 }

But LilyPond wants an argument right then and there. I strongly
suspect I could do a Scheme macro if I knew enough about Scheme and
LilyPond internals, but that seems overkill when all I really want is
the equivalent of a C compilers macro expansion capability.

I could write such a utility easily enough in Perl, and I suspect it's
simple enough that I could learn enough Python to write it without too
much trouble (thereby not introducing a fourth language into the mix),
but I'm wondering if there already exists a simple way to do text
substitutions that I don't know about. (I'd also like to use this for
a more general conditional interpretation facility than the tags


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