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Re: Scheme function returning \book

From: David Kastrup
Subject: Re: Scheme function returning \book
Date: Wed, 16 Jan 2019 00:14:32 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

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 { ... } }


David Kastrup

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