On Fri, Jul 31, 2009 at 2:44 PM, Trevor Daniels<t.dani...@treda.co.uk> wrote:
>
> Mark Polesky wrote Friday, July 31, 2009 8:51 PM
>>
>> I'm okay with it. But I'd like to see what the others think. Am
>> I correct in thinking that if an object returns #t for this test
>> from within a .ly file, it qualifies as a "parser variable"?
>>
>> #(defined? 'object-name)
>
> Sorry, I don't know. Anyone else?
I *think* that's true.
For example, in a \paper block, you could do:
\paper {
annotate-spacing = ##t
#(display (defined? 'annotate-spacing))
}
or
\paper {
#(define annotate-spacing #t)
#(display (defined? 'annotate-spacing))
}
Both display true. But this will display false:
\paper {
#(display (defined? 'annotate-spacing))
}
The same should be true for variable assignments outside of \paper,
\layout, and \header too. I recently read about this in the Guile
manual:
http://www.gnu.org/software/guile/manual/html_node/Binding-Constructs.html#Binding-Constructs
HTH,
Patrick
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