Pattern matching on multiple objects

[David Alayachew]

Hello,

For whatever reason, I remember seeing this as another potential future
direction for Java.

$ build/windows-x86_64-server-release/images/jdk/bin/jshell --enable-preview
|  Welcome to JShell -- Version 21-internal
|  For an introduction type: /help intro

jshell> sealed interface ABC {
   ...>     enum A implements ABC {Z}
   ...>     record B(A a) implements ABC {}
   ...>     record C(A a, B b) implements ABC {}
   ...> }
|  created interface ABC

jshell> final ToIntFunction<ABC> d =
   ...> abc ->
   ...> switch (abc) {
   ...>     case C(A.Z, B(A.Z)) -> 1;
   ...>     default -> 0;
   ...> };

I think it was called constant patterns?

Thank you for your time!
David Alayachew
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