>> I want to write a user-friendly markup command that can accept either
>> a markup or a markup list as arguments. Example:
>>
>> ```
>> % \ornament <above-stack> <base> <below-stack>
>> \markup \ornament \number ♭
>> \musicglyph "scripts.turn"
>> \number ♮
>> \markup \ornament { \number ♭ \number ♭ }
>> \musicglyph "scripts.turn"
>> \number ♮
>> ```
>
> So if you give a markup list here, is this supposed to be stacked
> horizontally or vertically?
Vertically.
> If horizontally, adding \line does not seem all that terrible.
Yep.
> And it will be hard to explain what
>
> \markup \ornament \with-color #red { \number ♭ \number ♭ } ...
>
> is supposed to do: is \with-color #red applied to the numbers or to
> the whole list?
I would rather write either
\markup \with-color #red \ornament { \number ♭ \number ♭ } ...
or
\markup \ornament { \with-color #red \number ♭
\with-color #red \number ♭ } ...
so I don't mind if
\markup \ornament \with-color #red { \number ♭ \number ♭ } ...
is probably not well defined.
Werner
