Am Mi., 17. Okt. 2018 um 21:40 Uhr schrieb David Wright
<lily...@lionunicorn.co.uk>:
>
> On Wed 17 Oct 2018 at 15:43:40 (+0200), Thomas Morley wrote:
>
> > I'd like to propose the code below. Attached as well.
> >
> > It stores the info in a string, which is converted to a nested list
> > suitable for 'systemStartDelimiterHierarchy'. It can be nested in
> > arbitrary depth.
> >
> > I used the following signs:
> > [] indicating start/end of SystemStartBracket
> > {} indicating start/end of SystemStartBrace
> > <> indicating start/end of SystemStartSquare
> > () indicating start/end of SystemStartBar
> > Other elements should be of string-length 1
> >
> > I'm not that happy with the ones for SystemStartSquare and
> > SystemStartBar. Though I looked for signs mirroring each others and
> > not hard to type.
>
> Would ## work for SystemStartSquare and || for SystemStartBar?
> I think they're on most computer keyboards.
Your suggestion will not work with my current coding. I likely should
have been more verbose in comments/explanations:
As coded one needs _different_ signs for start and end of a SystemStartGrob.
I used matching pairs like <> or [], etc, in order to give the user a
better oversight what is done.
Also, my jEdit-editor and most others are able to highlight those
matching parens/brackets.
Otoh, if you look into 'ref-list' in
'string->raw-system-start-hierarchy-list' you'll notice several ending
signs which _all_ will evaluate to #t.
Actually "{-}" will have the same outcome as "{-]" or "{->}". For
nested expression the code will sort out the correct nesting later.
As an experiment, replace the original 'ref-lst' with
'((#\{ . SystemStartBrace)
(#\[ . SystemStartBracket)
(#\| . SystemStartBar)
(#\# . SystemStartSquare)
(#\) . #t))
")" is now the general ending-sign, "#"/"|" the starting-signs for
SystemStartSquare/Bar. So you could do:
<<
\new Staff R1
\new StaffGroup
\with {
\setSystemStartDelimiterHierarchy
"1{2{3 4 5)|#6 7)8) 9 1)"
\override SystemStartBar.color = #red
\offset X-offset -1 SystemStartBar
\override SystemStartSquare.collapse-height = 1
}
<<
$@(make-list 10 #{ \new Staff R1 #})
>>
\new Staff R1
>>
Though, even for the example above I made some mistakes while typing
the "1{2{3 4 5)|#6 7)8) 9 1)"
Ok, make that "several mistakes"
So, using the original 'ref-list' has the advantage that matching
parens/brackets/etc-pairs are less confusing for the user and most
editors will highlight them.
My remaining concern is how obvious and intuitive
"(" SystemStartBar
"<" SystemStartSquare
would be.
Cheers,
Harm
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