Add patterns module: pattern matching from JDK 21 to 27

Type, record and primitive patterns, guards, sealed exhaustiveness, MatchException via separate compilation, and eight captured transcripts. Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
2026-09-24 11:50:40 +00:00
parent 96b25c8fc4
commit bc91b9c8d0
36 changed files with 736 additions and 0 deletions
@@ -0,0 +1,9 @@
+public class NotExhaustiveObject {
+    static String f(Object o) {
+        return switch (o) {
+            case String s -> "string";
+            case Integer i -> "int";
+        };
+    }
+    public static void main(String[] args) { System.out.println(f("x")); }
+}