GeneralizingElementVisitor2<R> class

An element visitor that will recursively visit all of the elements in an element model (like instances of the class RecursiveElementVisitor2). In addition, when an element of a specific type is visited not only will the visit method for that specific type of element be invoked, but additional methods for the supertypes of that element will also be invoked. For example, using an instance of this class to visit a MethodElement will cause the method visitMethodElement to be invoked but will also cause the methods visitExecutableElement and visitElement to be subsequently invoked. This allows visitors to be written that visit all executable elements without needing to override the visit method for each of the specific subclasses of ExecutableElement.

Note, however, that unlike many visitors, element visitors visit objects based on the interfaces implemented by those elements. Because interfaces form a graph structure rather than a tree structure the way classes do, and because it is generally undesirable for an object to be visited more than once, this class flattens the interface graph into a pseudo-tree. In particular, this class treats elements as if the element types were structured in the following way:

[Element]
  [ClassElement]
  [EnumElement]
  [ExecutableElement]
    [ConstructorElement]
    [LocalFunctionElement]
    [MethodElement]
    [PropertyAccessorElement]
      [GetterElement]
      [SetterElement]
    [TopLevelFunctionElement]
  [ExtensionElement]
  [ExtensionTypeElement]
  [FormalParameterElement]
    [FieldFormalParameterElement]
    [SuperFormalParameterElement]
  [GenericFunctionTypeElement]
  [LabelElement]
  [LibraryElement]
  [MixinElement]
  [MultiplyDefinedElement]
  [PrefixElement]
  [TypeAliasElement]
  [TypeParameterElement]
  [VariableElement]
    [LocalVariableElement]
    [PropertyInducingElement]
      [FieldElement]
      [TopLevelVariableElement]

Subclasses that override a visit method must either invoke the overridden visit method or explicitly invoke the more general visit method. Failure to do so will cause the visit methods for superclasses of the element to not be invoked and will cause the children of the visited node to not be visited.

Clients may extend this class.