src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java

@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 1999, 2026, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this

@@ -28,11 +28,10 @@
  import java.lang.annotation.Annotation;
  import java.lang.annotation.Inherited;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.EnumSet;
- import java.util.HashMap;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.Callable;
  import java.util.function.Supplier;
  import java.util.function.Predicate;

@@ -402,22 +401,42 @@
              (flags() & STATIC) != 0 ||
              (owner.flags() & INTERFACE) != 0 && kind != MTH &&
               name != name.table.names._this;
      }
  
+     public boolean isStrict() {
+         return (flags() & STRICT) != 0;
+     }
+ 
+     public boolean isSynthetic() {
+         return (flags() & SYNTHETIC) != 0;
+     }
+ 
+     public boolean isStrictInstance() {
+         return (flags() & STRICT) != 0 && (flags() & STATIC) == 0;
+     }
+ 
      public boolean isInterface() {
-         return (flags() & INTERFACE) != 0;
+         return (flags_field & INTERFACE) != 0;
      }
  
      public boolean isAbstract() {
          return (flags_field & ABSTRACT) != 0;
      }
  
      public boolean isPrivate() {
          return (flags_field & Flags.AccessFlags) == PRIVATE;
      }
  
+     public boolean isValueClass() {
+         return (flags_field & VALUE_CLASS) != 0;
+     }
+ 
+     public boolean isIdentityClass() {
+         return !isInterface() && (flags_field & IDENTITY_TYPE) != 0;
+     }
+ 
      public boolean isPublic() {
          return (flags_field & Flags.AccessFlags) == PUBLIC;
      }
  
      public boolean isEnum() {

@@ -1340,11 +1359,11 @@
  
          public ClassSymbol(long flags, Name name, Symbol owner) {
              this(
                  flags,
                  name,
-                 new ClassType(Type.noType, null, null),
+                 new ClassType(Type.noType, null, null, List.nil()),
                  owner);
              this.type.tsym = this;
          }
  
          public void addPermittedSubclass(ClassSymbol csym, int pos) {