Move unused local variables and classes analysis into HintGenerator.

pkg/analyzer/lib/src/generated/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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.element;
 
 import 'dart:collection';
@@ skipping 3366 matching lines @@
     if (shortName == null) {
       shortName = displayName;
     }
     Source source = this.source;
     if (source != null) {
       return "$shortName (${source.fullName})";
     }
     return shortName;
   }
 
-  /**
-   * Return `true` if this element is used or potentially can be used.
-   *
-   * For a top-level element: it is public, or it is private and used in the
-   * defining library.
-   *
-   * For a local variable: its value is used (i.e. purely read or invoked)
-   * somewhere in its scope.
-   *
-   * This information is only available for local variables (including
-   * parameters) and only after the compilation unit containing the element
-   * has been resolved.
-   */
-  bool get isUsed {
-    if (isPublic) {
-      return true;
-    }
-    return hasModifier(Modifier.IS_USED_IN_LIBRARY);
-  }
-
   @override
   LibraryElement get library => getAncestor((element) => element is LibraryElement);
 
   @override
   ElementLocation get location => new ElementLocationImpl.con1(this);
 
   @override
   String get name => _name;
 
   @override
@@ skipping 147 matching lines @@
 
   /**
    * Return `true` if this element has the given modifier associated with it.
    *
    * @param modifier the modifier being tested for
    * @return `true` if this element has the given modifier associated with it
    */
   bool hasModifier(Modifier modifier) => BooleanArray.getEnum(_modifiers, modifier);
 
   /**
-   * Specifies that the element is used.
-   */
-  void markUsed() {
-    setModifier(Modifier.IS_USED_IN_LIBRARY, true);
-  }
-
-  /**
    * If the given child is not `null`, use the given visitor to visit it.
    *
    * @param child the child to be visited
    * @param visitor the visitor to be used to visit the child
    */
   void safelyVisitChild(Element child, ElementVisitor visitor) {
     if (child != null) {
       child.accept(visitor);
     }
   }
@@ skipping 4699 matching lines @@
    * @param name the name of this element
    * @param nameOffset the offset of the name of this element in the file that contains the
    *          declaration of this element
    */
   LocalVariableElementImpl(String name, int nameOffset) : super(name, nameOffset);
 
   @override
   accept(ElementVisitor visitor) => visitor.visitLocalVariableElement(this);
 
   @override
-  bool get isUsed {
-    return hasModifier(Modifier.IS_USED_IN_LIBRARY);
-  }
-
-  @override
   ElementKind get kind => ElementKind.LOCAL_VARIABLE;
 
   @override
   List<ToolkitObjectElement> get toolkitObjects {
     CompilationUnitElementImpl unit = getAncestor((element) => element is CompilationUnitElementImpl);
     if (unit == null) {
       return ToolkitObjectElement.EMPTY_ARRAY;
     }
     return unit._getToolkitObjects(this);
   }
@@ skipping 480 matching lines @@
    */
   static const Modifier GETTER = const Modifier('GETTER', 8);
 
   /**
    * A flag used for libraries indicating that the defining compilation unit contains at least one
    * import directive whose URI uses the "dart-ext" scheme.
    */
   static const Modifier HAS_EXT_URI = const Modifier('HAS_EXT_URI', 9);
 
   /**
-   * Indicates that the element is used in the declaring library.
-   *
-   *
-   * For a top-level element: it is public, or it is private and used in the
-   * defining library.
-   *
-   * For a local variable: its value is used (i.e. purely read or invoked)
-   * somewhere in its scope.
-   */
-  static const Modifier IS_USED_IN_LIBRARY = const Modifier('IS_USED_IN_LIBRARY', 10);
-
-  /**
    * Indicates that a class can validly be used as a mixin.
    */
   static const Modifier MIXIN = const Modifier('MIXIN', 11);
 
   /**
    * Indicates that the value of a parameter or local variable might be mutated within the context.
    */
   static const Modifier POTENTIALLY_MUTATED_IN_CONTEXT = const Modifier('POTENTIALLY_MUTATED_IN_CONTEXT', 12);
 
   /**
@@ skipping 33 matching lines @@
       ABSTRACT,
       ASYNCHRONOUS,
       CONST,
       DEFERRED,
       ENUM,
       FACTORY,
       FINAL,
       GENERATOR,
       GETTER,
       HAS_EXT_URI,
-      IS_USED_IN_LIBRARY,
       MIXIN,
       POTENTIALLY_MUTATED_IN_CONTEXT,
       POTENTIALLY_MUTATED_IN_SCOPE,
       REFERENCES_SUPER,
       SETTER,
       STATIC,
       SYNTHETIC,
       TYPEDEF];
 
   const Modifier(String name, int ordinal) : super(name, ordinal);
@@ skipping 2941 matching lines @@
     if (type is UnionType) {
       return (type as UnionTypeImpl).internalUnionTypeIsSuperTypeOf(this, visitedTypePairs);
     }
     // The only subtype relations that pertain to void are therefore:
     // void <: void (by reflexivity)
     // bottom <: void (as bottom is a subtype of all types).
     // void <: dynamic (as dynamic is a supertype of all types)
     return identical(type, this) || type.isDynamic;
   }
 }