Multiple Inheritance

[Mercerenies]

Not actual multiple inheritance, but it would be nice to be able to simulate it.

• We can already emulate parent lookup with missing (and we use that trick in modules with importAll).
• Kernel keys is implemented in terms of Parents hierarchy, so it would only be necessary to make hierarchy manipulable to make the illusion complete.

[Mercerenies]

It's worth noting that a temporary solution is to use mixins, which emulate multiple inheritance by injecting duplicate objects (via Object dup) into the inheritance chain of other objects.

[Mercerenies]

Following in ES6's footsteps, we could consider using "well-known" symbols in a similar way to Stream dumpHandler to get hierarchy to recognize the alternative parenting.