8246199: 'permits' is a restricted identifier

Reviewed-by: mcimadamore

src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java

@@ -3360,6 +3360,13 @@ public class JavacParser implements Parser {
                 log.warning(pos, Warnings.RestrictedTypeNotAllowedPreview(name, Source.JDK15));
             }
         }
+        if (name == names.permits) {
+            if (allowSealedTypes) {
+                return Source.JDK15;
+            } else if (shouldWarn) {
+                log.warning(pos, Warnings.RestrictedTypeNotAllowedPreview(name, Source.JDK15));
+            }
+        }
         return null;
     }
 

test/langtools/tools/javac/sealed/SealedCompilationTests.java

@@ -267,6 +267,8 @@ public class SealedCompilationTests extends CompilationTestCase {
 
         for (String s : List.of(
                 "class sealed {}",
+                "enum sealed {}",
+                "record sealed() {}",
                 "interface sealed {}",
                 "@interface sealed {}"
         )) {
@@ -281,6 +283,34 @@ public class SealedCompilationTests extends CompilationTestCase {
             assertFail("compiler.err.restricted.type.not.allowed.here", s);
         }
 
+        for (String s : List.of(
+                "class SealedTest { String permits; }",
+                "class SealedTest { int permits = 0; }",
+                "class SealedTest { void test(String permits) { } }",
+                "class SealedTest { void permits(String permits) { } }",
+                "class SealedTest { void test() { String permits = null; } }"
+        )) {
+            assertOK(s);
+        }
+
+        for (String s : List.of(
+                "class permits {}",
+                "enum permits {}",
+                "record permits() {}",
+                "interface permits {}",
+                "@interface permits {}"
+        )) {
+            assertFail("compiler.err.restricted.type.not.allowed", s);
+        }
+
+        for (String s : List.of(
+                "class Foo { permits m() {} }",
+                "class Foo { permits i; }",
+                "class Foo { void m(permits i) {} }"
+        )) {
+            assertFail("compiler.err.restricted.type.not.allowed.here", s);
+        }
+
         String[] testOptions = {/* no options */};
         String[] previousCompOptions = getCompileOptions();
         setCompileOptions(testOptions);