On Fri, Mar 6, 2015 at 7:40 AM, Urs Liska <u...@openlilylib.org> wrote:
> Am 06.03.2015 14:35, schrieb David Nalesnik:
>
>
>
> On Fri, Mar 6, 2015 at 7:24 AM, David Nalesnik <david.nales...@gmail.com>
> wrote:
>
>>
>>
>> \version "2.19.16"
>>
>> #(set! default-script-alist
>> (append default-script-alist
>> (list
>> `("weakbeat"
>> . (
>> (script-stencil . (feta . ("weakbeat" . "weakbeat")))
>> ; any other properties
>> (toward-stem-shift-in-column . 0.0)
>> (padding . 0.20)
>> (avoid-slur . around)
>> (direction . ,UP))))))
>>
>> weakbeat = #(make-articulation "weakbeat")
>>
>> { c\weakbeat }
>>
>> \layout {
>> \context {
>> \Score
>> scriptDefinitions = #default-script-alist
>> }
>> }
>>
>> %%%
>>
>>
> Here's my conclusion:
>
> When using append, we are setting default-script-alist to a list which
> doesn't necessarily share structure with the original default-script-alist.
> scriptDefinitions is bound to the original default-script-alist unless you
> reassign it to the concatenated list. append! destructively modifies the
> list that scriptDefinitions is bound to, so there is no need for the set in
> the context block.
>
>
> There is not even the need for the set! in the original definition. That
> is:
>
> #(append! default-script-alist
> (list
> `("weakbeat"
> . ((script-stencil . (feta . ("weakbeat" . "weakbeat")))
> ; any other properties
> (toward-stem-shift-in-column . 0.0)
>
> And you can do:
\layout {
\context {
\Score
scriptDefinitions = #(append default-script-alist
(list
`("weakbeat"
. (
(script-stencil . (feta . ("weakbeat" .
"weakbeat")))
; any other properties
(toward-stem-shift-in-column . 0.0)
(padding . 0.20)
(avoid-slur . around)
(direction . ,UP)))))
}
}
%%%
(Just for completeness...)
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