On 6/20/09 2:17 PM, "Mark Polesky" <markpole...@yahoo.com> wrote:
>
>
> Here are some proposed additions to LM B. Scheme tutorial
Good for you! Thanks!
>
> ***new paragraph and example:
> Multiple consecutive scheme expressions in a music file can be
> combined using the *begin* operator. This reduces the number of
> hash marks to one. However, within such a combined expression,
> LilyPond comments ("%" and "%{ %}") will produce errors.
>
> #(begin
>
> (define foo 0)
> (define bar 1)
>
> )
>
I think you should split up the two concepts in the above:
1) LilyPond comments can't be included in Scheme expressions
2) (begin ... ) is used to combine sequential Scheme expressions
LilyPond comments will fail inside of *any* Scheme expression, not just
(begin ... )
i.e.
#(define (foo bar baz)
(let ((bar 2)
% This is a LilyPond comment
(baz 3))
% This is too
(+ bar baz)))
Will also throw errors.
You may also wish to include a third concept:
3) if # is followed by (, the parser remains in Scheme mode until a matching
) is found.
> ***new sentence and example:
> Comments in Guile Scheme are entered as follows:
>
> ; this is a single-line comment
>
> #!
> this a (non-nestable)
> guile-style block comment
> !#
I think we shouldn't introduce block comments, but I don't feel strongly
about it.
If we do introduce block comments, we should mention that the LilyPond
source doesn't use block comments.
>
> ***back to current:
> For the rest of this section, we will assume that the data is
> entered in a music file, so we add #s everywhere.
>
>
> ************
>
>
> ...and maybe at the end, some info regarding using the display
> function within a music file to emulate a guile "sandbox".
> See the thread at:
> http://lists.gnu.org/archive/html/lilypond-devel/2009-06/msg00436.html
>
Also, probably add that you can get a guile interpreter in most systems by
opening a terminal window and typing guile.
This is good stuff, Mark. Thanks for your contributions!
Carl
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