On Mon, Dec 15, 2008 at 6:09 PM, Patrick McCarty <pnor...@gmail.com> wrote:
> Hi Trevor,
>
> On Mon, Dec 15, 2008 at 2:12 PM, Trevor Bača <trevorb...@gmail.com> wrote:
> >
> > * OK, so based on this understanding, can somebody please correct my
> > understanding of the parsing (not the iteration, just the parsing) of the
> > following expression (which is the same as my original example #2):
> >
> > {
> > \new Voice {
> > c'8 c'8 c'8 c'8
> > }
> > d'8 d'8 d'8 d'8
> > }
> >
> > If I'm understanding how the parser works, then what should result here
> is a
> > music expression that looks like this:
> >
> > Global
> > V
> > \new Score
> > V
> > \new Staff
> > V
> > \new Voice
> > V
> > Sequential
> > V
> > \new Voice, d'8, d'8, d'8, d'8
> > V
> > Sequential
> > V
> > c'8, c'8, c'8, c'8
> >
> >
> > If I'm counting correctly, that's 15 total nodes in the expression tree.
> > Eight atomic nodes and seven internal nodes. The Global, \new Score, \new
> > Staff and the first \new Voice are all created implicitly.
> >
> > I know that the next part in the process is iteration. But I want to stop
> > and check my understanding here: am I understanding the output of the
> parser
> > correctly at this point?
>
> I'm pretty sure this would be the result *after* iteration.
>
> The parser output can be visualized with \displayMusic. So your
> example would look like this, using your convention above:
>
> Sequential
> V V
> \new Voice d'8, d'8, d'8, d'8
> V
> Sequential
> V
> c'8, c'8, c'8, c'8
>
> After this, the iteration process starts, proceeding moment by moment
> and making sure everything is placed in the correct context. Then you
> would end up with a tree that looks like the one you posted. I
> believe the implicit creation of contexts happens during iteration.
>
> (I could be completely wrong, but it makes sense to me).
OK, and Han-Wen confirms what you're saying, too.
Much appreciated. Going back to look at more code now ...
--
Trevor Bača
trevorb...@gmail.com
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