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Re: parallel-music - no R5RS compliant?
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From: |
Nicolas Sceaux |
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Subject: |
Re: parallel-music - no R5RS compliant? |
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Date: |
Sat, 13 May 2006 12:20:53 +0200 |
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User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (darwin) |
Bertalan Fodor <address@hidden> writes:
> Hello,
>
> I've found this in the definition of parallelmusic:
>
> ;; check sequence length
> (apply for-each (lambda (. seqs)
> (let ((moment-reference (ly:music-length (car seqs))))
> (for-each (lambda (seq moment)
> (if (not (equal? moment
> moment-reference))
> (ly:music-message seq
> "Bars in parallel music don't
> have the same length")))
> seqs (map-in-order ly:music-length seqs))))
> voices)
>
> However, this (lambda (. seqs) ..... )
> does not work on my java-based R5RS parser
>
> I looked at the lexical definition of R5RS and found this:
>
> <lambda expression> --> (lambda <formals> <body>)
> <formals> --> (<variable>*) | <variable> | (<variable>+ .: <variable>)
>
> My JavaCC for this is:
> formals :
> E_OPEN^ ( ( variable )+ ( DOT variable )? )? E_CLOSE!
> | variable
> ;
>
> This seems to not allow (. seqs)
>
> What do you think I should do?
I think that I should fix it :-)
You're right, I've been lazy, and scheme gets on my nerves sometimes.
It should be (lambda* (#:rest seqs) ...), having
(use-modules (ice-9 optargs)) before.
nicolas