RFR: 8315532: Compiler Implementation for Unnamed Variables and Patterns

[Aggelos Biboudis]

8315532: Compiler Implementation for Unnamed Variables and Patterns

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Commit messages:
 - 8315532: Compiler Implementation for Unnamed Variables and Patterns

Changes: https://git.openjdk.org/jdk/pull/15649/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15649&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315532
  Stats: 176 lines in 34 files changed: 37 ins; 37 del; 102 mod
  Patch: https://git.openjdk.org/jdk/pull/15649.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15649/head:pull/15649

PR: https://git.openjdk.org/jdk/pull/15649