----- Original Message -----
From: "David Kastrup" <[email protected]>
To: "Phil Holmes" <[email protected]>
Cc: "Urs Liska" <[email protected]>; <[email protected]>
Sent: Monday, March 31, 2014 2:44 PM
Subject: Re: Difference between # and $
"Phil Holmes" <[email protected]> writes:
I've read
http://lilypond.org/doc/v2.19/Documentation/extending/lilypond-scheme-syntax
(as no doubt, Urs has) and tried to use $ in place of #. Can't get it
to compile. So, taking the following note doubler, how would $ be
used instead of #?
dubble = #(define-music-function( parser location arg )
(ly:music?)
#{ $arg $arg #}
)
{ c'' \dubble c' }
Huh? Which # would you even want to replace here? #{ ... #} is inside
of Scheme. $arg already uses a $.
This code works fine as written.
Er - yes. I know it works fine. I ran it. However, the page I refer to
above says "Another way to call the Scheme interpreter from LilyPond is the
use of dollar $ instead of a hash mark for introducing Scheme expressions".
So my presumption was that "#(define-music-function" is "a hash mark for
introducing Scheme expressions" and could be replaced by a $. But if I do
that, it fails to compile.
--
Phil Holmes
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