Add Variable::from_usize

[dhardy]

Rationale: I have a unique reproducible way of generating keys per variable; using that saves me from creating a Variable → key map.

[schell]

Oh, look at that. You did!

[dhardy]

Yes, I did. This crate appears unmaintained. For my use-case, I'll probably move kas away from Cassowary anyway because it is inefficient and hard to debug.

[schell]

What will you use instead? Are the inefficiencies unable to be overcome with some profiling?

[dhardy]

I'm mostly done with replacement code for my case which isn't quite as flexible but good enough and a lot simpler overall. I'll link to it when I'm done.

Inefficiencies are mostly because of the number of allocations this lib does, I think. Haven't looked into it much and it may still be good enough.

[dhardy]

What will you use instead?

My replacement code is mostly done now, and very specific to my use-case (widget placement). See:

• Layout trait
• driver
• procedural macros

The latter is the heart of this system: lots of code injected per widget (I am hoping this doesn't cause issues when scaling to complex UIs; it also needs adjustment to handle dynamic content).