Change memberName and namedArguments in Invocation to use Symbol.

dart/sdk/lib/core/invocation.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.
 
 part of dart.core;
 
 /**
  * Representation of the invocation of a member on an object.
  *
  * This is the type of objects passed to [Object.noSuchMethod] when
  * an object doesn't support the member invocation that was attempted
  * on it.
  */
 abstract class Invocation {
   /** The name of the invoked member. */

[Ivan Posva, 2013/04/16 18:19:49]

To be able to get the "name" of the invoked member we will have a credible story
on allowing toString of Symbols.

[ahe, 2013/04/16 18:32:00]

Did you notice MirrorSystem.getName? Does that provide a credible story? Is more
needed?

-  String get memberName;
+  Symbol get memberName;
 
   /** An unmodifiable view of the positional arguments of the call. */
   List get positionalArguments;
 
   /** An unmodifiable view of the named arguments of the call. */
-  Map<String, dynamic> get namedArguments;
+  Map<Symbol, dynamic> get namedArguments;
 
   /** Whether the invocation was a method call. */
   bool get isMethod;
 
   /**
    * Whether the invocation was a getter call.
    * If so, both types of arguments will be null.
    */
   bool get isGetter;
 
@@ skipping 10 matching lines @@
 
   /**
    * Perform the invocation on the provided object.
    *
    * If the object doesn't support the invocation, its [noSuchMethod]
    * method will be called with either this [InvocationMirror] or another
    * equivalent [InvocationMirror].
    */
   invokeOn(Object receiver);
 }