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<[email protected]> writes:
Am 24.02.2012 um 16:24 schrieb:
Jan-Peter Voigt<[email protected]> 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<[email protected]>
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.
>From 40a1419a051402ee4bac6d8f7fa65e5b8353b815 Mon Sep 17 00:00:00 2001
From: Jan-Peter Voigt <[email protected]>
Date: Fri, 2 Mar 2012 09:54:20 +0100
Subject: [PATCH] add ly:book-set-header!
Add a scheme function ly:book-set-header! like ly:score-set-header!
Function is copied from score-scheme.cc to book-scheme.cc,
setting public member var header_ in class Book.
---
lily/book-scheme.cc | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/lily/book-scheme.cc b/lily/book-scheme.cc
index 7f1026a..ae505af 100644
--- a/lily/book-scheme.cc
+++ b/lily/book-scheme.cc
@@ -156,6 +156,19 @@ LY_DEFINE (ly_book_header, "ly:book-header",
return b->header_ ? b->header_ : SCM_BOOL_F;
}
+LY_DEFINE (ly_book_set_header_x, "ly:book-set-header!",
+ 2, 0, 0, (SCM book, SCM module),
+ "Set the book header.")
+{
+ LY_ASSERT_SMOB (Book, book, 1);
+ SCM_ASSERT_TYPE (ly_is_module (module), module, SCM_ARG2, __FUNCTION__,
+ "module");
+
+ Book *b = unsmob_book (book);
+ b->header_ = (module);
+ return SCM_UNSPECIFIED;
+}
+
LY_DEFINE (ly_book_scores, "ly:book-scores",
1, 0, 0, (SCM book),
"Return scores in @var{book}.")
--
1.7.0.4
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