2009/4/26 Trevor Daniels <t.dani...@treda.co.uk>:
> Just to recap, the advantage of \override over \set is that previously
> overridden values can be recovered by \revert because they are
> pushed onto a stack, whereas \unset simply restores the original
> default value. Is that right?
Yes.
The problem with context properties is there's nowhere to store the
previous value, hence why the following doesn't work:
\relative c' {
\set fontSize = #-5
c4
\once \set fontSize = #4.7
c4
% reverts to default size, rather than -5
c
}
> If so, are there any other context
> properties that might benefit from a similar push-down stack?
Definitely.
There's an issue logged for this related to midi, but it would be
useful in many other situations.
> My knowledge of the internals is not sufficient to judge whether this
> is feasible or even possible, but is this an alternative approach
> worth considering?
I'm sure it's possible, but it's way beyond my capabilities.
Regards,
Neil
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