| [frogs] Scheme function (third) used in ly_syntax_constructors |
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- To: Lilypond Frogs List <frogs@xxxxxxxxxxx>
- Subject: [frogs] Scheme function (third) used in ly_syntax_constructors
- From: Ian Hulin <ian@xxxxxxxxxxxx>
- Date: Sun, 09 Jan 2011 23:06:54 +0000
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Hi all,
In ly_syntax_constructors.scm there are these lines
(defmacro define-ly-syntax-loc (args . body)
`(define-public ,args
(let ((m ,(cons 'begin body)))
(set! (ly:music-property m 'origin) ,(third args))
;; ^^^^^^^^^^
m)))
(third) doesn't seem to be defined in our code (I've searched with git
grep), and I can't find any reference in the Guile/scheme documentation.
I'd like to understand what this macro does as I want to see if there's
any possibility of doing all the stuff in ly_syntax_constructors stuff
via (define-syntax).
Sorry if the answer is really obvious but I'd really like to know where
(third) is defined.
Cheers,
Ian Hulin
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