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Extending #{ ... #}
From: |
David Kastrup |
Subject: |
Extending #{ ... #} |
Date: |
Fri, 29 Jul 2011 15:52:38 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
Hi,
currently the following works because it hacks around a number of
internals in parser-ly-from-scheme.scm:
zap = #(define-music-function (parser location str) (string?)
#{ }
parseStringResult = ^\markup { $str }
{ #})
\new Voice { \zap #"pling" r4 c_\zap #"plong" }
This is not pretty. I'd like to get there using just
#{ ^\markup { $str } #}
And I would want #{ ... #} to work for other entities valid in
assignments, without losing its current way of dealing with simple
sequential music.
The idea would be to have read-lily-expression push a special start
symbol into the parser that would throw it into a mode suitable for
parsing a #{ #} spec (which is better delimited than the argument for an
assignment).
How to get that start symbol in? Optional argument for the parser?
Explicit call pushing the token?
Suggestions?
--
David Kastrup
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