Re: modular "markup" and arguments

[Paul Morris]

Bric wrote
> I want the ability to distribute the effect of "\boo" to a SET of notes.
> 
> Such as \boo {  dis'  e'  fis' g' }
> 
> where all the four notes are affected by boo.
> 
> I tried using
> 
> boo = { \override NoteHead.color = #red }
> 
> and  then  \boo dis' e' fis' g \revert
> 
> but that, of course, is incorrect syntax.

I think to get this to work you have to say what it is you want to revert? 
You could do it like this:

\version "2.17.29"

boo = { \override NoteHead.color = #red }
revertboo = { \revert NoteHead.color }

{ a' \boo dis' e' fis' g \revertboo b }


But I think what you really want is a music function:

\version "2.17.29"

boo =
#(define-music-function
     (parser location the-music)
     (ly:music?)
   #{
     \override NoteHead.color = #red
     #the-music
     \revert NoteHead.color
   #})

\relative c' { c4 d e f \boo { g a b } c d e }

For more about music functions, see the docs:
http://lilypond.org/doc/v2.17/Documentation/extending/music-functions

HTH,
-Paul



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