Hi all,
i got stuck when working on a function that creates custom context
definitions. The idea is to have a function \newInstrument that would
take a list of settings and create new customized xxxStaff and
xxxVoice contexts - something like this:
newInstrument =
#(define-scheme-function
(parser location instrName parentName settings)(string? ly:context-mod?)
;; ...
#{
\layout {
\context {
;; create "instrNameStaff" context, derived from "parentNameStaff",
;; with default child "instrNameVoice", and modifications specified
;; in "settings" argument
}
\context {
;; create "instrNameVoice" context, derived from "parentNameVoice",
}
}
#})
As you can see, i want to be able to specify the "parent" instrument
from which the new instrument will "inherit" settings. For example, i
want to define a "Vocals" instrument (=> VocalsStaff and VocalsVoice
contexts, derived from Staff and Voice, respectively) and a "Soprano"
instrument derived from "Vocals" (=> SopranoStaff and SopranoVoice
contexts, derived from VocalsStaff and VocalsVoice, respectively).
I managed to write a function that does something like this, but I
have two problems:
1) inside the function, i don't know how to get a context definition
from its name (i.e. from a string). Right now i have to pass parent
contexts' definitions as separate arguments, but this means that i
have three arguments instead of one.
2) i didn't manage to get midi stuff done inside the same function as
the layout stuff - but i think that i'll be able to solve that if i
have a solution to 1).
I offer €25 bounty for solving 1). I may also offer a bounty for 2)
if i won't manage to do it myself :)
See the attachment for the code that i already have.
best,
Janek
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