Hello,
I am trying to dive a bit into the way LilyPond works, and I was
wondering about iterators. The documentation contains a page named
“iterator tutorial” [1] but this is only a placeholder for a future
tutorial. (I very much understand that it is painful to write such
tutorials and I am not here to complain of anything!)
[1]
https://lilypond.org/doc/v2.20/Documentation/contributor/iterator-tutorial
The only thing the page actually says is “Iterators are routines written
in C++ that process music expressions and sent the music events to the
appropriate engravers and/or performers.”
Must I understand that it is not possible to write iterators in Scheme
and that they have to be written in C++?
Must I then understand that, if I wanted to write iterators for a
personal use, I would have to recompile LilyPond myself?
If it is actually possible to write an iterator in Scheme, would anyone
have an example to show me or a link to give me?
Thank you so much in advance.
Best,
— Niols
