Re: Scheme function to return pitchnames as markup/text

[David Kastrup]

Stephen Cummings <address@hidden> writes:

> Quite comfortable with such cheek. Thank you.
>
> Still, I will try to package up a more formally named version of that
> little function. A translating map or loop will then be needed to 
> extract note names and render them in more conventional form, but that
> won't require inscrutable-for-me ly:xxx calls. (Pardon the mistaken 
> reference to displayMusic rather than displayLilyMusic.)

I didn't actually catch it until looking at the first output.

> I'll pursue getting my original to work for learning purposes, and
> with the thought that discarding non-pitch events early rather than
> late might be better: if pitch -> convert to custom note name -> add
> to output string -> loop; then return the string. Sure helps to know
> that pitch-notename returns a number.

I would be skeptical anyway that \displayLilyMusic would be the best
approach for your purpose but I did want to point out that catching
output in a string is always an option in Scheme's port model.

>
> David Kastrup wrote on 11/19/2019 3:43 PM:
>> Stephen Cummings <address@hidden> writes:
>>
>>> Am I missing a basic LilyPond command/directive--something built-in
>>> that takes music as input and returns note names as text? Such a
>>> functionality would seem to be useful in all kinds of
>>> annotations/quotations. I know about \displayMusic but its output only
>>> goes to the console/output stream and can't be routed to markup, correct?
>> Hm?
>>
>> musmark
>> = ^\tweak self-alignment-X #CENTER
>>    -$(define-scheme-function (music) (ly:music?)
>>       (with-output-to-string (lambda () (displayLilyMusic music)))) \etc
>>
>> {
>>    c'\musmark { c' }
>> }
>>
>> Though it's probably a bit cheeky to $\etc the scheme function
>> in anonymously.  But you could give a name to the define-scheme-function
>> call as usual.
>>
>>
>>

-- 
David Kastrup