Thank you, David!
On 6/23/20 4:09 PM, David Kastrup wrote:
David Kastrup <[email protected]> writes:
Paul Scott <[email protected]> writes:
On 6/23/20 2:23 PM, David Kastrup wrote:
Paul Scott <[email protected]> writes:
The 1st argument for note is now a duration rather than a string.
I had some scheme definitions which were variations on \tempo.
I used (string?) for this value before. What is the new scheme
equivalent? (duration?)
ly:duration?
Thank you, David.
I believe I had tried that.
Here's my MWE which hopefully will show someone what dumb mistake I'm
making:
\version "2.21.2"
#(define-markup-command (notetest layout props dur) (ly:duration?)
interpret-markup layout props
(markup
#:note dur #up
))
{
\tempo \markup{ Allegro \notetest #4 }
c'1
}
Thank you,
Several. Is there a reason you use the markup macro rather than
#{ \markup ... #} ? The latter can do the same but is more
straightforward to use when not familiar with Scheme syntax, and you
really make it appear like you aren't.
You write interpret-markup ... instead of (interpret-markup ...) . In
Scheme, every pair of paren conveys meaning. They aren't syntactic
sugar which you can add or remove.
Then you write #up in Scheme. # in Scheme introduces specially parsed
expressions, such as #(...) for literal vectors, or #{ ... #} for
embedded LilyPond or #t or #f for true and false boolean literals.
And both LilyPond and (Guile) Scheme are case sensitive: you cannot swap
up and UP.
In LilyPond expressions, you'd write #UP here, with # escaping from
LilyPond mode into Scheme mode, and UP being the Scheme expression in
question. If you are doing copy-and-paste from documentation, only
LilyPond mode will work sensibly, so my recommendation of using
#{ \markup ... #} here.
Then you call \notetest #4 where 4 is a number, not a duration. To get
into LilyPond parsing mode for an argument of a markup function, one can
use braces (I am not sure this feature will persist to 2.22 in this
form, but 2.21 is a development version). So you need to write { 4 }
here in order to get a duration. In a way, that is syntactic sugar for
writing ##{ 4 #} but the latter looks uglier.
Forgot the example.
