Re: Discuss signature for new function \annotate

[Urs Liska]

Hi David,

thanks for your comments!

Am 06.06.2013 12:22, schrieb David Kastrup:
> Urs Liska <address@hidden> writes:
>
> > I'm interested in
> > - general thoughts on the signature design (as I still lack experience
> > with Scheme functions)
> > % Plain signature of the function draft
> > annotate =
> > #(define-void-function (parser location grob type properties annotation)
> >     (string? string? list? string?)
> >     )
> >
> > \relative ges, {
> >    \key ges \major
> >    \clef bass
> >    \time 3/4
> >    
> >    \repeat tremolo 24 ges32-> -\markup { \dynamic "sfz" } \p \< |
> >    \annotate Script "critremark"
> >    #'(("voice" . "vc1")
> >       ("source" . "Ms. 2")
> >       ("author" . "Urs Liska")
> >       ("date" . "2013-06-06"))
> >    "Tenuto added as in Vc. 2"
> If your first argument is something like Script, you might want to make
> it of type symbol? instead.  I actually have a syntax sanitizing patch
> in limbo where unquoted words are not accepted as strings.  It is not
> going to make it into 2.18, but I don't promise I won't push it at some
> later point of time.
What type is the 'grob' argument of \shape?
And: with \shape the order of arguments was reversed for syntactical 
reasons (that I didn't really understand).
I would also like to \annotate e.g. individual notes from chords etc. So 
what would I have to take care of?
> It is probably worth considering to make properties of type context-mod?
> (potentially optional), then you can write the argument as
>
> \with {
>     voice = "vc1"
>     source = "Ms. 2"
>     author = "Urs Liska"
>     date = "2013-06-06"
> }
That looks very good. How would the values then be accessed? Are they 
simple variables inside the function? Or does that also create an alist 
internally
> Of course, you might get unsets and overrides and reverts slipped in
> which you would want to weed out again, but list? is also prone to
> permitting a lot that you don't want to see.
Sure. I'd have to iterate over the alist and ignore all keys I can't 
handle. But how would that be with a context-mod?

Urs