Unexpected behaviour of ly:make-book and ly:make-book-part

[Timothy Lanfear]

While constructing books using Scheme functions, I found some behaviour 
I did not expect.

The scores are written out in the reverse order from the order of the 
arguments. Easily fixed by applying the reverse function to the list of 
scores. Is there a reason for this choice of ordering?

The scores to be written by ly:make-book-part are in a single list 
argument, whereas the scores for ly:make-book are provided as one score 
per argument and a variable number of arguments. The documentation 
strings for the two functions are identical as regards passing the 
scores. ly:make-book-part's syntax seems more natural.

\version "2.19.44"

scorea = \score { a'1 }
scoreb = \score { b'1 }

mybookpart = #(define-void-function (a b) (ly:score? ly:score?)
  (let* ((bookpart (ly:make-book-part (list a b)))
         (book     (ly:make-book $defaultpaper $defaultheader)))
    (ly:book-add-bookpart! book bookpart)
    (ly:book-process book $defaultpaper $defaultlayout "bookpart")))

mybook = #(define-void-function (a b) (ly:score? ly:score?)
  (let* ((book (ly:make-book $defaultpaper $defaultheader a b)))
    (ly:book-process book $defaultpaper $defaultlayout "book")))

\mybookpart \scorea \scoreb
\mybook \scorea \scoreb

--
Timothy Lanfear, Bristol, UK.