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 +1,10 @@
+public class GuardBeforeGeneral {
+    static String f(Object o) {
+        return switch (o) {
+            case String s -> "any string";
+            case String s when s.isEmpty() -> "empty string";   // guarded case after the unguarded one
+            default -> "other";
+        };
+    }
+    public static void main(String[] args) { System.out.println(f("")); }
+}