New candidate JEP: 455: Primitive types in Patterns, instanceof, and switch (Preview)

[Mark Reinhold]

https://openjdk.org/jeps/455

  Summary: Enhance pattern matching by allowing primitive type patterns
  to be used in all pattern contexts, align the semantics of primitive
  type patterns with that of instanceof, and extend switch to allow
  primitive constants as case labels. This is a preview language feature.

- Mark