Re: Old LilyPond versions

[Mats Bengtsson]

Graham Percival wrote:
> On Wed, 09 Apr 2008 00:21:36 +0200
> Mats Bengtsson <address@hidden> wrote:
>
>   
> > Quoting Graham Percival <address@hidden>:
> >     
> > > 2)  it would of course be nice to automate this.  At the moment, I
> > > can't see why this would take more than five hours.  Maybe 15
> > > hours if the person had never touched python before.
> > >       
> > See
> > http://lists.gnu.org/archive/html/bug-lilypond/2007-12/msg00156.html
> > I don't think the problem is that easy, especially since the music
> > expression may in the general case contain an arbitrarily deep
> > nesting of {} and <<>>, which means that you cannot use regular
> > expressions.
> >     
>
> I'm not really comfortable with regular expressions, so I wasn't
> going to suggest this anyway.  :)   As for nesting, we could
> simply count the number of { } and << >> to figure out when the
> expression is over.
>   
I actually implemented such a solution in convert-ly in the conversion 
rules for version 1.9.0, to
be able to handle the conversion of the old markup syntax that used 
nested parentheses (like Scheme),
so this might be useful as a source of inspiration.

Note that what you propose is a proper solution of Issue 518 in the bug 
tracker.

  /Mats