Re: Making a list argument reliably optional

[David Kastrup]

Robin Bannister <address@hidden> 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