Re: Scheme function returning \book

[Thomas Morley]

Am Mi., 16. Jan. 2019 um 00:14 Uhr schrieb David Kastrup <address@hidden>:
>
> Lukas-Fabian Moser <address@hidden> writes:
>
> > Hi David,
> >> \test apparently expects a string argument.
> >
> > Aaargh, sorry, stupid me, and stupid copy'n'paste error. So, another try:
> >
> > \version "2.19.82"
> >
> > test = #(define-scheme-function (suffix) (string?)  #{
> >   \book {
> >     \bookOutputSuffix #suffix
> >     \score {
> >       d4
> >     }
> >   }
> > #} )
> >
> > \test "surname"
> >
> > (still) causes a "Bad expression type" error.
>
> Ah, well.  Turns out that copying the code for \xxx here where \xxx was
> a book identifier was not really a good idea before anybody figures out
> and defines the difference between a book and a bookpart.  Currently it
> is not viable to distinguish them.
>
> \book { \test "surname" }
>
> could conceivably just close its eyes and say "ok, let's treat it as a
> book rather than a bookpart" but doesn't.  Does anybody have an idea
> what is supposed to distinguish a book from a bookpart outside of actual
>
> \book {
>   \bookpart { ... } }
>
> usage?

For layout vs paper we have is-layout vs is-paper.
Couldn't we set some variable/property like is-book/is-bookpart for
book vs bookpart
?

Cheers,
  Harm