Make possible to don't track cache dependencies.

pkg/analyzer/lib/src/generated/engine.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 analyzer.src.generated.engine;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1126 matching lines @@
    * Return `true` if analysis is to parse comments.
    */
   bool get preserveComments;
 
   /**
    * Return `true` if strong mode analysis should be used.
    */
   bool get strongMode;
 
   /**
+   * Return `true` if dependencies between computed results should be tracked
+   * by analysis cache.  This option should only be set to `false` if analysis
+   * is performed in batch mode, so that none of the input is ever changed

[Brian Wilkerson, 2016/06/08 17:48:03]

"batch mode" has a special meaning for dartanalyzer :-( Perhaps "batch mode, so"
--> "such a way"

+   * during the life time of the context.
+   */
+  bool get trackCacheDependencies;
+
+  /**
    * Return an integer encoding of the values of the options that need to be the
    * same across all of the contexts associated with partitions that are to be
    * shared by a single analysis context.
    */
   int encodeCrossContextOptions();
 
   /**
    * Set the values of the cross-context options to match those in the given set
    * of [options].
    */
@@ skipping 119 matching lines @@
   bool strongMode = false;
 
   /**
    * A flag indicating whether strong-mode inference hints should be
    * used.  This flag is not exposed in the interface, and should be
    * replaced by something more general.
    */
   // TODO(leafp): replace this with something more general
   bool strongModeHints = false;
 
+  @override
+  bool trackCacheDependencies = true;
+
   /**
    * Initialize a newly created set of analysis options to have their default
    * values.
    */
   AnalysisOptionsImpl();
 
   /**
    * Initialize a newly created set of analysis options to have the same values
    * as those in the given set of analysis [options].
    */
@@ skipping 12 matching lines @@
     hint = options.hint;
     incremental = options.incremental;
     incrementalApi = options.incrementalApi;
     incrementalValidation = options.incrementalValidation;
     lint = options.lint;
     preserveComments = options.preserveComments;
     strongMode = options.strongMode;
     if (options is AnalysisOptionsImpl) {
       strongModeHints = options.strongModeHints;
     }
+    trackCacheDependencies = options.trackCacheDependencies;
   }
 
   bool get analyzeFunctionBodies {
     if (identical(analyzeFunctionBodiesPredicate, _analyzeAllFunctionBodies)) {
       return true;
     } else if (identical(
         analyzeFunctionBodiesPredicate, _analyzeNoFunctionBodies)) {
       return false;
     } else {
       throw new StateError('analyzeFunctionBodiesPredicate in use');
@@ skipping 1235 matching lines @@
    * The data that was created from the source.
    */
   final E data;
 
   /**
    * Initialize a newly created holder to associate the given [data] with the
    * given [modificationTime].
    */
   TimestampedData(this.modificationTime, this.data);
 }