Re: Storing a bookpart in a variable

[Jan-Peter Voigt]

Hi Vaughan,

you have to wrap the scheme-expression in another \bookpart{} statement 
and use "instant" scheme expressions with a '$'-sign for this to work:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
...

\book {
   \bookpart {
     $(if
     (string-contains compileTheseMovements "1")
     FirstMovement
     EmptyBookpart)
   }

   \bookpart {
     $(if
     (string-contains compileTheseMovements "2")
     SecondMovement
     EmptyBookpart)
   }
} % \book
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

HTH


Am 25.02.2016 um 00:48 schrieb Vaughan McAlley:
> Greetings,
>
> I’d like to be able to specify at the top of my main score which
> movements are printed. I can store a \bookpart in a variable, but I
> can’t seem to return it from a scheme expression. Is there a bookpart
> equivalent to define-music-function that I haven’t found?
>
> Vaughan
>
>
> %%%%%%%%%%%%%%%%%%
> \version "2.18.2"
>
> compileTheseMovements = "2" % change to "12" to compile both movements
>
> EmptyBookpart = \bookpart {}
>
> FirstMovement = \bookpart {
>     \tocItem "First Movement"
>     \header {
>        title = "Multi-movement piece"
>        composer = "LvB"
>        subtitle = "First Movement"
>     }
>
>     \score {
>        { \time 2/4 r8 g' [ g' g'] es'2 }
>        \layout {}
>        \midi {}
>     }
>
> }
>
> SecondMovement = \bookpart {
>     \tocItem "Second Movement"
>     \header {
>        title = ##f
>        subtitle = "Second Movement"
>     }
>     \score {
>        { \time 3/8 \partial 8 es16. as32 c'8 c'16. bes32 as16. c'32 f4 }
>        \layout {}
>        \midi {}
>     }
> }
>
> \book {
>     #(if
>       (string-contains compileTheseMovements "1")
>       FirstMovement
>       EmptyBookpart)
>
>     #(if
>       (string-contains compileTheseMovements "2")
>       SecondMovement
>       EmptyBookpart)
>
> %{
>     % This works fine
>     \FirstMovement
>     \SecondMovement
> %}
>
> } % \book
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> _______________________________________________
> lilypond-user mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/lilypond-user