CCing to the list.
Am 25.06.2018 um 21:47 schrieb Freeman Gilmore:
On Mon, Jun 25, 2018 at 9:29 AM, Urs Liska <li...@openlilylib.org
<mailto:li...@openlilylib.org>> wrote:
Hi Freeman,
Am 25.06.2018 um 15:03 schrieb Freeman Gilmore:
Can scheme alone be used in Frescobaldi (or scheme sandbox)?
It's not clear to me what you want ot achieve.
The Scheme sandbox is surely not available in Frescobaldi.
You can of course write LilyPond files that exclusively contain
Scheme code, and that code doesn't have to be related to scores.
But at least the entry point must be LilyPond language.
Try this file:
\version "2.19.80"
#(let
((something 'something-else))
(display something)
(newline)
(display something)(display something))
It will do in Scheme what you tell it, and from there you have
access to anything you can do with Guile Scheme (and the LilyPond
environment set up automatically).
That will give you syntax highlighting and auto-indentation from
Frescobaldi (much better than the Scheme sandbox) but no immediate
expression evaluation.
HTH
Urs
thank you,
ƒg
Thanks Urs:
That worked. Problem was that I did not know that the results would
be displayed in the log window. The tutorial I am using had some
example like (+ 1 2 3) => and I was expecting 6 in the same window
on the next line when I compiled.
This is what one refers to as a REPL (read-eval-print-loop), which is
what LilyPond's Scheme sandbox does.
This may be what you mean by " but no immediate expression evaluation".
Yes. Frescobaldi deals with LilyPond *files*, not an immediate
expression evaluation.
Is => valid in guile?
No.
How would I display the results of (+ 1 2 3), at this point of the
tutorial it just says "(+ 1 2 3) => 6"?
When a tutorial writes "=>" it means: "You type in '(+ 1 2 3)', and the
REPL will display '6'. So "=>" isn't a syntactical construct but a
typographical convention for "the expression to the left evaluates to
the datum on the right".
Tutorials usually want you to learn from this immediate evaluation, and
in Frescobaldi you have to always do that extra step to display
something. But in general it's worth the effort, and I do that 90% of
the time when I want to try something out or learn more about Scheme.
For displaying values you can use #(display) or #(ly:message "Some
value: ~a" data) (to start with ...)
HTH
Urs
Thank you,
ƒg
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