[L2Ork-dev] Patch private abstractions

Matt Barber brbrofsvl at gmail.com
Fri Aug 7 15:58:33 EDT 2020

This is gonna be amazing. Thanks for all your work, Guillem.

I'll look forward to seeing the next iteration!


On Fri, Aug 7, 2020 at 2:58 PM Guillem Bartrina <guillembartrina at gmail.com>

> Hi,
> I've spent some time implementing the first Matt's approach.
> > 1. [ab <name>] abstractions are treated as every bit as local as [pd
> > <name>] subpatches, except for each instance has a private $0. [ab <name>]
> > definitions do not cross file boundaries, either up to parent or down to
> > file abstractions, but the can cross [ab <name>] boundaries, so that [ab
> > lob] first defined as root->[pd foo]->[ab bar]->[ab lob] can be
> > instantiated anywhere else in root except in another [ab lob] or
> > descendant, or across a file boundary. This is probably the most Pd-like,
> > and what I'd likely go with by default, as it fits best with the pd/ab
> > object analogy.
> I have found some major problems that I have been able to solve, some in a
> cleaner way than others.
> For example, I've been forced to add the construction of a dependency
> graph for all ab definitions in order to completely and correctly detect
> the instantiation of ab objects within themselves. I've also used the
> topological sorting of this graph together with some hacky tricks to store
> the ab definitions (hoisted) so that we get the same state [non created
> (red border) ab instances due to dependence issues] when the patch is
> loaded again from the file.
> > You could send messages to ab-<name> and access every instance.
> Done
> > Name clash. Should the [ab] names be their own separate thing, so that
> [ab counter] and a file abstraction called by [counter] > are different? Is
> that even possible? Likewise should [ab float] be possible without
> conflicting with builtin, or [ab z~] without > conflicting with an external?
> Ab names are actually their own separate thing. We are not using
> pd_objetmaker anywhere so they cannot lead us to a name clash problem.
> > What happens if one deletes all instances of [ab foo]? I think the patch
> > should somehow remember the definition so that it can be instantiated
> > again. That probably means it should be hoisted to root and not associated
> > with any instances at all.
> Right now it remembers the definition until the file is closed. In other words, only the definitions with at least one instance are saved into the pd file.
> > Will [savestate] work?
> I haven't had time to study this topic.
> ---------
> In conclusion:
> I started implementing this feature in the cleanest and simplest way that I could. Some problems in the middle of the development have forced me to use some hacky and non-clean techniques to make all the gears of the feature work. Some of them could be fixed, others will force us to rethink the whole feature.
> At least now, as Jonathan said, we have a base to start playing around.
> I will submit a merge request tomorrow so I need a new branch :)
> Best,
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