Re: Scheme used badly: syntax problem
Graham King writes:
> Many thanks David!
>
> (In the course of trying to convert the \note syntax, I discovered the
> existence of \note-by-number which solved 90% of my problem. Sorry for
> the confusing reference to \note.)
Well, \note-by-number #1 #0 #UP is essentially the same as \note {2} #UP
If you are not calculating note values, \note tends to have the simpler
syntax.
--
David Kastrup
Re: Scheme used badly: syntax problem
Many thanks David!
(In the course of trying to convert the \note syntax, I discovered the
existence of \note-by-number which solved 90% of my problem. Sorry for
the confusing reference to \note.)
On Sun, 2023-09-17 at 00:38 +0200, David Kastrup wrote:
> Graham King writes:
>
> > I'm trying to convert a naive Scheme function which has been broken
> > by
> > the new syntax for \note. Some arithmetic gives me the index (in
> > this
> > MNWE, 96) to a list of pairs, foo, from which I want to extract
> > some
> > markup.
> >
> > The 300-LOC problem seems to boil down to this:
> >
> > %~~~
> > \version "2.25.7"
> >
> > #(define foo '((96 . #{ \markup { \note-by-number #1 #0 #UP }#})))
> >
> > { c'1^\markup {#(cdr (assoc 96 foo))} }
> > %~~~
> >
> > Please could a kind Scheme expert point out the stupid and obvious
> > mistake that has eluded me for several evenings?
>
> Uh, there isn't even \note in there?
>
> The problem in the above is a quoting problem: you mustn't quote
> #{...#}, and you can avoid quoting it using quasiquote and unquote:
>
> \version "2.25.7"
>
> #(define foo `((96 . ,#{ \markup { \note-by-number #1 #0 #UP }#})))
>
> { c'1^\markup {#(cdr (assoc 96 foo))} }
>
Re: Scheme used badly: syntax problem
Graham King writes:
> I'm trying to convert a naive Scheme function which has been broken by
> the new syntax for \note. Some arithmetic gives me the index (in this
> MNWE, 96) to a list of pairs, foo, from which I want to extract some
> markup.
>
> The 300-LOC problem seems to boil down to this:
>
> %~~~
> \version "2.25.7"
>
> #(define foo '((96 . #{ \markup { \note-by-number #1 #0 #UP }#})))
>
> { c'1^\markup {#(cdr (assoc 96 foo))} }
> %~~~
>
> Please could a kind Scheme expert point out the stupid and obvious
> mistake that has eluded me for several evenings?
Uh, there isn't even \note in there?
The problem in the above is a quoting problem: you mustn't quote
#{...#}, and you can avoid quoting it using quasiquote and unquote:
\version "2.25.7"
#(define foo `((96 . ,#{ \markup { \note-by-number #1 #0 #UP }#})))
{ c'1^\markup {#(cdr (assoc 96 foo))} }
--
David Kastrup
