GeneralizingElementVisitor<R> class

An element visitor that will recursively visit all of the elements in an element model (like instances of the class RecursiveElementVisitor). 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
  CompilationUnitElement
  ExecutableElement
      ConstructorElement
      LocalElement
          FunctionElement
      MethodElement
      PropertyAccessorElement
  ExportElement
  HtmlElement
  ImportElement
  LabelElement
  LibraryElement
  MultiplyDefinedElement
  PrefixElement
  TypeAliasElement
  TypeParameterElement
  UndefinedElement
  VariableElement
      PropertyInducingElement
          FieldElement
          TopLevelVariableElement
      LocalElement
          LocalVariableElement
          ParameterElement
              FieldFormalParameterElement

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.

Implemented types

• ElementVisitor<R>

Constructors

GeneralizingElementVisitor()

Initialize a newly created visitor.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

visitClassElement(ClassElement element) → R?

override

visitCompilationUnitElement(CompilationUnitElement element) → R?

override

visitConstructorElement(ConstructorElement element) → R?

override

visitElement(Element element) → R?

visitExecutableElement(ExecutableElement element) → R?

visitExportElement(ExportElement element) → R?

override

visitExtensionElement(ExtensionElement element) → R?

override

visitFieldElement(FieldElement element) → R?

override

visitFieldFormalParameterElement(FieldFormalParameterElement element) → R?

override

visitFunctionElement(FunctionElement element) → R?

override

visitGenericFunctionTypeElement(GenericFunctionTypeElement element) → R?

override

visitImportElement(ImportElement element) → R?

override

visitLabelElement(LabelElement element) → R?

override

visitLibraryElement(LibraryElement element) → R?

override

visitLocalElement(LocalElement element) → R?

visitLocalVariableElement(LocalVariableElement element) → R?

override

visitMethodElement(MethodElement element) → R?

override

visitMultiplyDefinedElement(MultiplyDefinedElement element) → R?

override

visitParameterElement(ParameterElement element) → R?

override

visitPrefixElement(PrefixElement element) → R?

override

visitPropertyAccessorElement(PropertyAccessorElement element) → R?

override

visitPropertyInducingElement(PropertyInducingElement element) → R?

visitSuperFormalParameterElement(SuperFormalParameterElement element) → R?

override

visitTopLevelVariableElement(TopLevelVariableElement element) → R?

override

visitTypeAliasElement(TypeAliasElement element) → R?

override

visitTypeParameterElement(TypeParameterElement element) → R?

override

visitVariableElement(VariableElement element) → R?

Operators

operator ==(Object other) → bool

The equality operator.

inherited