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List:       lilypond-user
Subject:    Re: Making a list argument reliably optional
From:       David Kastrup <dak () gnu ! org>
Date:       2019-08-25 21:00:34
Message-ID: 87tva56jv1.fsf () fencepost ! gnu ! org
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Robin Bannister <rcb@dabble.ch> writes:

> David Kastrup wrote:
>
>
>> A number list counts as not-number?.  
>
> So I changed the not- number? predicate to also exclude number-list?
> but this was no better.  And then I determined all the individually
> problematic lilypond-scheme-predicates and also excluded these in the
> predicate never-matches-a-number? - which nevertheless matched a
> number.

I cannot diagnose or fix anything without an actual example.

-- 
David Kastrup

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