Compute all default values of parameters.

pkg/analyzer/lib/src/task/driver.dart

 // Copyright (c) 2015, 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.task.driver;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/src/context/cache.dart';
@@ skipping 28 matching lines @@
   final List<WorkManager> workManagers;
 
   /**
    * The context in which analysis is to be performed.
    */
   final InternalAnalysisContext context;
 
   /**
    * The map of [ComputedResult] controllers.
    */
-  final Map<ResultDescriptor,
-          StreamController<ComputedResult>> resultComputedControllers =
+  final Map<ResultDescriptor, StreamController<ComputedResult>>
+      resultComputedControllers =
       <ResultDescriptor, StreamController<ComputedResult>>{};
 
   /**
    * The work order that was previously computed but that has not yet been
    * completed.
    */
   WorkOrder currentWorkOrder;
 
   /**
    * Indicates whether any tasks are currently being performed (or building
@@ skipping 100 matching lines @@
     CacheEntry entry = context.getCacheEntry(target);
     CacheState state = entry.getState(result);
     if (state == CacheState.VALID ||
         state == CacheState.ERROR ||
         state == CacheState.IN_PROCESS) {
       return null;
     }
     TaskDescriptor taskDescriptor = taskManager.findTask(target, result);
     try {
       WorkItem workItem =
-          new WorkItem(context, target, taskDescriptor, result, null);
+          new WorkItem(context, target, taskDescriptor, result, 0, null);
       return new WorkOrder(taskManager, workItem);
     } catch (exception, stackTrace) {
       throw new AnalysisException(
           'Could not create work order (target = $target; taskDescriptor = $taskDescriptor; result = $result)',
           new CaughtException(exception, stackTrace));
     }
   }
 
   /**
    * Create a work order that will produce the required analysis results for
@@ skipping 360 matching lines @@
   /**
    * A description of the task to be performed.
    */
   final TaskDescriptor descriptor;
 
   /**
    * The [ResultDescriptor] which was led to this work item being spawned.
    */
   final ResultDescriptor spawningResult;
 
+  final int level;

[Paul Berry, 2015/12/17 15:05:47]

Doc comment missing - did you leave this code in by accident?

+
   /**
    * The work order that this item is part of, may be `null`.
    */
   WorkOrder workOrder;
 
   /**
    * An iterator used to iterate over the descriptors of the inputs to the task,
    * or `null` if all of the inputs have been collected and the task can be
    * created.
    */
@@ skipping 24 matching lines @@
    * cycles, this is the set of all [WorkItem]s in the entire strongly
    * connected component).  Otherwise, `null`.
    */
   List<WorkItem> dependencyCycle;
 
   /**
    * Initialize a newly created work item to compute the inputs for the task
    * described by the given descriptor.
    */
   WorkItem(this.context, this.target, this.descriptor, this.spawningResult,
-      this.workOrder) {
+      this.level, this.workOrder) {
     AnalysisTarget actualTarget =
         identical(target, AnalysisContextTarget.request)
             ? new AnalysisContextTarget(context)
             : target;
+//    print('${'\t' * level}$spawningResult of $actualTarget');

[Paul Berry, 2015/12/17 15:05:47]

Looks like this was left in by accident too

     Map<String, TaskInput> inputDescriptors =
         descriptor.createTaskInputs(actualTarget);
     builder = new TopLevelTaskInputBuilder(inputDescriptors);
     if (!builder.moveNext()) {
       builder = null;
     }
     inputs = new HashMap<String, dynamic>();
   }
 
   @override
@@ skipping 81 matching lines @@
         // input onto a waiting list and proceed to the next input so that work
         // could proceed, but given that the only result that can currently be
         // IN_PROCESS is CONTENT, I don't know that it's worth the extra effort
         // to implement the general solution at this point.
         //
         throw new UnimplementedError();
       } else if (inputState != CacheState.VALID) {
         try {
           TaskDescriptor descriptor =
               taskManager.findTask(inputTarget, inputResult);
-          return new WorkItem(
-              context, inputTarget, descriptor, inputResult, workOrder);
+          return new WorkItem(context, inputTarget, descriptor, inputResult,
+              level + 1, workOrder);
         } on AnalysisException catch (exception, stackTrace) {
           this.exception = new CaughtException(exception, stackTrace);
           return null;
         }
       } else {
         builder.currentValue = inputEntry.getValue(inputResult);
         if (builder.flushOnAccess) {
           inputEntry.setState(inputResult, CacheState.FLUSHED);
         }
       }
@@ skipping 89 matching lines @@
   final TaskManager taskManager;
 
   _WorkOrderDependencyWalker(this.taskManager, WorkItem startingNode)
       : super(startingNode);
 
   @override
   WorkItem getNextInput(WorkItem node, List<WorkItem> skipInputs) {
     return node.gatherInputs(taskManager, skipInputs);
   }
 }