RFR: 8303374: Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview) [v19]

[Aggelos Biboudis]

> This is the first draft of a patch for Primitive types in patterns, instanceof, and switch (Preview).
> 
> Draft spec here: https://cr.openjdk.org/~abimpoudis/instanceof/jep443-20231010/specs/instanceof-jls.html

Aggelos Biboudis has updated the pull request incrementally with one additional commit since the last revision:

  Fix duplicate method name and add a new test in PrimitivePatternsSwitchErrors

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15638/files
  - new: https://git.openjdk.org/jdk/pull/15638/files/3c0d85e9..d06b2172

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15638&range=18
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15638&range=17-18

  Stats: 18 lines in 2 files changed: 10 ins; 2 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/15638.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15638/head:pull/15638

PR: https://git.openjdk.org/jdk/pull/15638