src/java.compiler/share/classes/javax/lang/model/util/AbstractTypeVisitor6.java

*** 1,7 ****
  /*
!  * Copyright (c) 2005, 2019, 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
--- 1,7 ----
  /*
!  * Copyright (c) 2005, 2020, 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
*** 33,58 ****
  /**
   * A skeletal visitor of types with default behavior appropriate for
   * the {@link javax.lang.model.SourceVersion#RELEASE_6 RELEASE_6}
   * source version.
   *
!  * <p> <b>WARNING:</b> The {@code TypeVisitor} interface implemented
!  * by this class may have methods added to it in the future to
!  * accommodate new, currently unknown, language structures added to
!  * future versions of the Java&trade; programming language.
!  * Therefore, methods whose names begin with {@code "visit"} may be
!  * added to this class in the future; to avoid incompatibilities,
!  * classes which extend this class should not declare any instance
!  * methods with names beginning with {@code "visit"}.
   *
   * <p>When such a new visit method is added, the default
!  * implementation in this class will be to call the {@link
!  * #visitUnknown visitUnknown} method.  A new abstract type visitor
!  * class will also be introduced to correspond to the new language
!  * level; this visitor will have different default behavior for the
!  * visit method in question.  When the new visitor is introduced, all
!  * or portions of this visitor may be deprecated.
   *
   * @param <R> the return type of this visitor's methods.  Use {@link
   *            Void} for visitors that do not need to return results.
   * @param <P> the type of the additional parameter to this visitor's
   *            methods.  Use {@code Void} for visitors that do not need an
--- 33,61 ----
  /**
   * A skeletal visitor of types with default behavior appropriate for
   * the {@link javax.lang.model.SourceVersion#RELEASE_6 RELEASE_6}
   * source version.
   *
!  * @apiNote
!  * <p id=note_for_subclasses><strong>WARNING:</strong> The {@code
!  * TypeVisitor} interface implemented by this class may have methods
!  * added to it in the future to accommodate new, currently unknown,
!  * language structures added to future versions of the Java&trade;
!  * programming language.  Therefore, methods whose names begin with
!  * {@code "visit"} may be added to this class in the future; to avoid
!  * incompatibilities, classes and subclasses which extend this class
!  * should not declare any instance methods with names beginning with
!  * {@code "visit"}.
   *
   * <p>When such a new visit method is added, the default
!  * implementation in this class will be to directly or indirectly call
!  * the {@link #visitUnknown visitUnknown} method.  A new abstract type
!  * visitor class will also be introduced to correspond to the new
!  * language level; this visitor will have different default behavior
!  * for the visit method in question.  When a new visitor is
!  * introduced, portions of this visitor class may be deprecated,
!  * including its constructors.
   *
   * @param <R> the return type of this visitor's methods.  Use {@link
   *            Void} for visitors that do not need to return results.
   * @param <P> the type of the additional parameter to this visitor's
   *            methods.  Use {@code Void} for visitors that do not need an