Jan-Peter Voigt <jp.vo...@gmx.de> writes:
> On 02.03.2012 10:30, David Kastrup wrote:
>> Jan-Peter Voigt<jp.vo...@gmx.de> writes:
>>
>>> 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))
>> "eval-string" is not exactly what I call "in Scheme".
>>
>>> \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?
>> make-module would be obvious.
> But if you try a (eval '(define title "Titel") (make-module)) it fails
> with "Unbound variable: define"?
Well, where would a definition for "define" come from in an empty
module?
--
David Kastrup
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