Re: Fold out repeats with alternatives

[David Kastrup]

David Kastrup <address@hidden> writes:

> Johan Vromans <address@hidden> writes:
>
>> David Kastrup <address@hidden> writes:
>>
>>> bla = { <big series of notes> \tag #'here {} <another series of notes> }
>>>
>>> \pushToTag #'here { <some notes1> } \bla
>>> \pushToTag #'here { <some notes2> } \bla
>>
>> Yes, this would be a way. Just like:
>>
>> before = { <big series of notes> }
>> after = { <another series of notes> }
>>
>>   ...
>>   \before
>>   <some notes1>
>>   \after
>>   \before
>>   <some notes2>
>>   \after
>>   ...
>>
>> However, I'd like to avoid the use of variables since that visually
>> interrupts the flow of notes.
>
> If you don't want the flow of notes interrupted, what will mark the
> location where <some notes1> and <some notes2> are to be spliced in?

Perhaps you want something like

#(define-macro (pattern args result)
   `(define-music-function (parser location ,@args)
      ,(make-list (length args) 'ly:music?)
      (make-sequential-music (list ,@result))))

$(pattern (A B C D) (A B D A C D))
  { a' a' a' a' }
  { b' b' b' b' }
  { c'' c'' c'' c'' }
  { d'' d'' d'' d'' }

-- 
David Kastrup