Added getField/setField to ObjectMirror. For InstanceMirrors, this get/sets

lib/mirrors/mirrors.dart

 // Copyright (c) 2012, 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("mirrors");
 
 // The dart:mirrors library provides reflective access for Dart program.
 //
 // For the purposes of the mirrors library, we adopt a naming
 // convention with respect to getters and setters.  Specifically, for
@@ skipping 103 matching lines @@
  */
 interface ObjectMirror extends Mirror {
   /**
    * Invokes the named function and returns a mirror on the result.
    *
    * TODO(turnidge): Properly document.
    */
   Future<InstanceMirror> invoke(String memberName,
                                 List<Object> positionalArguments,
                                 [Map<String,Object> namedArguments]);
+
+  /**
+   * Invokes a getter and returns a mirror on the result. The getter may be 
+   * either the implicit getter for a field or a user-defined getter method.
+   */
+  Future<InstanceMirror> getField(String fieldName);
+
+  /**
+   * Invokes a setter and returns a mirror on the result. The setter may be 
+   * either the implicit setter for a non-final field or a user-defined setter
+   * method.
+   */
+  Future<InstanceMirror> setField(String fieldName, Object value);
 }
 
 /**
  * An [InstanceMirror] reflects an instance of a Dart language object.
  */
 interface InstanceMirror extends ObjectMirror {
   /**
    * Returns a mirror on the class of the reflectee.
    */
   InterfaceMirror getClass();
@@ skipping 365 matching lines @@
 
 /**
  * A [MirrorException] is used to indicate errors within the mirrors
  * framework.
  */
 class MirrorException implements Exception {
   const MirrorException(String this._message);
   String toString() => "MirrorException: '$_message'";
   final String _message;
 }