Initial task support

pkg/analyzer/lib/src/task/targets.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.targets;
+
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/task/model.dart';
+
+/**
+ * A `SourceTarget` is a [Source] that can be used as an [AnalysisTarget].
+ */
+class SourceTarget implements AnalysisTarget {
+  /**
+   * The source being represented as a target.
+   */
+  final Source source;
+
+  /**
+   * Initialize a newly created target to represent the given [source].
+   */
+  SourceTarget(this.source);
+
+  @override
+  int get hashCode => source.hashCode;
+
+  @override
+  bool operator ==(Object object) {
+    return object is SourceTarget && object.source == source;
+  }
+}