Prepare for decoupling analyzer ASTs from element model.

pkg/analyzer/lib/dart/element/element.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Defines the element model. The element model describes the semantic (as
  * opposed to syntactic) structure of Dart code. The syntactic structure of the
  * code is modeled by the [AST structure](../ast/ast.dart).
  *
  * The element model consists of two closely related kinds of objects: elements
@@ skipping 19 matching lines @@
  *
  * The element model does not contain everything in the code, only those things
  * that are declared by the code. For example, it does not include any
  * representation of the statements in a method body, but if one of those
  * statements declares a local variable then the local variable will be
  * represented by an element.
  */
 library analyzer.dart.element.element;
 
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/resolution_base_classes.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/task/model.dart' show AnalysisTarget;
 
@@ skipping 506 matching lines @@
  * * fields that are induced by explicit declarations of getters and setters,
  *   and
  * * functions representing the initialization expression for a variable.
  *
  * Second, there are elements in the element model that do not have a name.
  * These correspond to unnamed functions and exist in order to more accurately
  * represent the semantic structure of the program.
  *
  * Clients may not extend, implement or mix-in this class.
  */
-abstract class Element implements AnalysisTarget {
+abstract class Element implements AnalysisTarget, ResolutionTarget {
   /**
    * A comparator that can be used to sort elements by their name offset.
    * Elements with a smaller offset will be sorted to be before elements with a
    * larger name offset.
    */
   static final Comparator<Element> SORT_BY_OFFSET =
       (Element firstElement, Element secondElement) =>
           firstElement.nameOffset - secondElement.nameOffset;
 
   /**
@@ skipping 203 matching lines @@
    * is no guarantee of the order in which the children will be visited.
    */
   void visitChildren(ElementVisitor visitor);
 }
 
 /**
  * A single annotation associated with an element.
  *
  * Clients may not extend, implement or mix-in this class.
  */
-abstract class ElementAnnotation implements ConstantEvaluationTarget {
+abstract class ElementAnnotation
+    implements ConstantEvaluationTarget, ResolutionTarget {
   /**
    * An empty list of annotations.
    */
   static const List<ElementAnnotation> EMPTY_LIST = const <ElementAnnotation>[];
 
   /**
    * Return a representation of the value of this annotation.
    *
    * Return `null` if the value of this annotation could not be computed because
    * of errors.
@@ skipping 1226 matching lines @@
   DartType get type;
 
   /**
    * Return a representation of the value of this variable, forcing the value
    * to be computed if it had not previously been computed, or `null` if either
    * this variable was not declared with the 'const' modifier or if the value of
    * this variable could not be computed because of errors.
    */
   DartObject computeConstantValue();
 }