Import analysis_services.dart into analysis_server.dart.

pkg/analysis_services/lib/search/element_visitors.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.
-
-library services.search.element_visitors;
-
-import 'package:analyzer/src/generated/element.dart';
-
-
-/**
- * Uses [processor] to visit all of the children of [element].
- * If [processor] returns `true`, then children of a child are visited too.
- */
-void visitChildren(Element element, ElementProcessor processor) {
-  element.visitChildren(new _ElementVisitorAdapter(processor));
-}
-
-
-/**
- * Uses [processor] to visit all of the top-level elements of [library].
- */
-void visitLibraryTopLevelElements(LibraryElement library,
-    ElementProcessor processor) {
-  library.visitChildren(new _TopLevelElementsVisitor(processor));
-}
-
-
-/**
- * An [Element] processor function type.
- * If `true` is returned, children of [element] will be visited.
- */
-typedef bool ElementProcessor(Element element);
-
-
-/**
- * A [GeneralizingElementVisitor] adapter for [ElementProcessor].
- */
-class _ElementVisitorAdapter extends GeneralizingElementVisitor {
-  final ElementProcessor processor;
-
-  _ElementVisitorAdapter(this.processor);
-
-  @override
-  void visitElement(Element element) {
-    bool visitChildren = processor(element);
-    if (visitChildren == true) {
-      element.visitChildren(this);
-    }
-  }
-}
-
-
-/**
- * A [GeneralizingElementVisitor] for visiting top-level elements.
- */
-class _TopLevelElementsVisitor extends GeneralizingElementVisitor {
-  final ElementProcessor processor;
-
-  _TopLevelElementsVisitor(this.processor);
-
-  @override
-  void visitElement(Element element) {
-    if (element is CompilationUnitElement) {
-      element.visitChildren(this);
-    } else {
-      processor(element);
-    }
-  }
-}