Urs Liska <u...@openlilylib.org> writes:
> When I replace symbol-list-or-music? with symbol? as the last
> parameter it compiles fine with 'Script' for example.
> So I could use that for now and only use it for grobs (and not as a
> postfix tweak) (?).
symbol-or-music? would likely work as well. You just can't write
something like Staff.Script then.
> Am 06.06.2013 15:34, schrieb David Kastrup:
>> Stupid question: independent of me fixing this, wouldn't your function
>> actually be supposed to return some music expression anyway? If so,
>> using a music function defined as #{ #} for the testing phase should be
>> sufficient for avoiding this parser problem.
> Well, that's not stupid, but essential.
> My function may or may not return a music expression depending on some
> flags. So I'll have to write a music function that eventually returns
> an empty music expression, isn't it?
Possibly. Pretty much all of the symbol-list-or-music? signature
functions return either an override (which is a music expression) or a
tweaked music expression (which obviously also is a music expression).
So there is no conflict of return type. But returning a void music
expression should also be fine.
--
David Kastrup
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