Re: book-predicate

[Jan-Peter Voigt]

Hello David, hello lists,

now, when we have a book-predicate, we are dealing with books in scheme. 
And then we might want to set a header after creating a book.
There is a function ly:score-set-header!, which I copied and adapted for 
the Book-class.
This patch compiled and works with the following snippet.

--snip--
\version "2.15.32"

bk = \book {
  \score {
    \relative c' {
      c4 e g b
    }
  }
}

#(let ((bh (eval-string "(define-module (a b))")))
     (eval '(define title "Hallo") bh)
     (ly:book-set-header! bk bh))

\book { \bk }
--snip--

Is this helpful for lily-devel?
And is there another (better) way of creating a module (for header 
generation) on the fly in scheme?

Cheers,
Jan-Peter

On 27.02.2012 10:10, David Kastrup wrote:
> Jan-Peter Voigt<address@hidden>  writes:
>
> > > Am 24.02.2012 um 16:24 schrieb:
> > >
> > > > Jan-Peter Voigt<address@hidden>  writes:
> > > >
> > > > > Hello list,
> > > > >
> > > > > when I use books or bookparts for (scheme-)function arguments, I
> > > > > haven't found the predicate for it.
> > > > > paper-book? is something else, or am I missing something?
> > > > Well, you can always use scheme? and file a feature request in the mean
> > > > time.
> > Thank you David,
> >
> > the scheme?-solution is what I do right now. I will send a feature
> > request next days.
> Don't bother.
>
> commit 09814b549186893c265bcdf835edbe242f6354cf
> Author: David Kastrup<address@hidden>
> Date:   Sun Feb 26 11:23:39 2012 +0100
>
>      Implement ly:book? and ly:context-def? predicates
>
> Note that a bookpart _is_ a book as well, usually without a paper block
> of its own.

0001-add-ly-book-set-header.patch
Description: Text Data