New candidate JEP: 441: Pattern Matching for switch

[Mark Reinhold]

https://openjdk.org/jeps/441

  Summary: Enhance the Java programming language with pattern matching
  for switch expressions and statements. Extending pattern matching to
  switch allows an expression to be tested against a number of patterns,
  each with a specific action, so that complex data-oriented queries can
  be expressed concisely and safely.

- Mark