Re: Use functions within functions

[Jan-Peter Voigt]

Hi Noeck,

here's a little snippet with a nonsense-function, embedding one function 
in another in two ways:

%--snip--
\version "2.16.1"

% define a music function
funA = #(define-music-function (parser location x y)(number? number?)
          (ly:input-message location "I am here!")
          (make-music 'TextScriptEvent 'tweaks `((extra-offset . (,x . 
,y))) 'text "H"))

% embed funA with embedded lily -> location is pointing to funA call 
inside this function
funB = #(define-music-function (parser location)()
          #{ \funA #0 #-2 #})

% embed funA as a scheme function -> location is pointing to funC call
funC = #(define-music-function (parser location)()
          (let ((fun-a (ly:music-function-extract funA)))
            (fun-a parser location 0 -2)))

{ c'' \funA #0 #-2 c'' \funB c'' \funC c'' }
%--snip--

HTH
Cheers, Jan-Peter

Am 08.01.2013 12:00, schrieb Noeck:
> Hi,
>
> how can I use a self-defined function with in another one?
>
> I tried the following pseudo-code, but then myfunc is no valid function
> name in the scope of the second function.
>
>
> ------ly-file-------------------------------
>
> #(… scheme function definition of function myfunc …)
>
>
> #(… function-head …
>    #{ … lilypond-code … #(myfunc arg)  … #}
>
> ------end-ly-file---------------------------
>
>
> (I have not yet tried putting both functions in one #(…) but I want to
> be able to distribute the function definition over different files.)
>
> Cheers,
> Joram
>
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