Implement ObjectMirror.[]

runtime/lib/mirrors_impl.dart

Index: runtime/lib/mirrors_impl.dart
diff --git a/runtime/lib/mirrors_impl.dart b/runtime/lib/mirrors_impl.dart
index e20aa8874d603d414c29eaca193a54e8a4bcd9d7..2670f043df941599502e3ca4a65ef3a8b91ec541 100644
--- a/runtime/lib/mirrors_impl.dart
+++ b/runtime/lib/mirrors_impl.dart
@@ -159,6 +159,18 @@ class _LocalIsolateMirrorImpl extends _LocalMirrorImpl
   String toString() => "IsolateMirror on '$debugName'";
 }
 
+class _InvocationTrampoline implements Function {
+  ObjectMirror _receiver;
+  Symbol _selector;
+  _InvocationTrampoline(this._receiver, this._selector);
+  noSuchMethod(Invocation msg) {
+    if (msg.memberName != #call) return super.noSuchMethod(msg);
+    return _receiver.invoke(_selector,
+                            msg.positionalArguments,
+                            msg.namedArguments);
+  }
+}
+
 abstract class _LocalObjectMirrorImpl extends _LocalMirrorImpl
     implements ObjectMirror {
   _LocalObjectMirrorImpl(this._reflectee);
@@ -317,6 +329,19 @@ class _LocalInstanceMirrorImpl extends _LocalObjectMirrorImpl
   static _identityHash(reflectee)
       native "InstanceMirror_identityHash";
 
+  Function operator [](Symbol selector) {
+    bool found = false;
+    for (ClassMirror c = type; c != null; c = c.superclass) {
+      var target = c.methods[selector];
+      if (target != null && !target.isStatic) {
+        found = true;
+        break;
+      }
+    }
+    if (!found) return null;
+    return new _InvocationTrampoline(this, selector);
+  }
+
   // Override to include the receiver in the arguments.
   InstanceMirror invoke(Symbol memberName,
                         List positionalArguments,
@@ -646,6 +671,12 @@ class _LocalClassMirrorImpl extends _LocalObjectMirrorImpl
 
   String toString() => "ClassMirror on '${_n(simpleName)}'";
 
+  Function operator [](Symbol selector) {
+    var target = methods[selector];
+    if (target == null || !target.isStatic) return null;
+    return new _InvocationTrampoline(this, selector);
+  }
+
   InstanceMirror newInstance(Symbol constructorName,
                              List positionalArguments,
                              [Map<Symbol, dynamic> namedArguments]) {
@@ -1002,6 +1033,11 @@ class _LocalLibraryMirrorImpl extends _LocalObjectMirrorImpl
 
   String toString() => "LibraryMirror on '${_n(simpleName)}'";
 
+  Function operator [](Symbol selector) {
+    if (!functions.containsKey(selector)) return null;
+    return new _InvocationTrampoline(this, selector);
+  }
+
   _invoke(reflectee, memberName, arguments, argumentNames)
       native 'LibraryMirror_invoke';