Implement Mirror.isSubclassOf.

tests/lib/mirrors/relation_subclass_test.dart

Index: tests/lib/mirrors/relation_subclass_test.dart
diff --git a/tests/lib/mirrors/relation_subclass_test.dart b/tests/lib/mirrors/relation_subclass_test.dart
index 2e8bbc24793d60b9e35945b73fc041ec7da894b7..f3cd717757f6f3d36bce582bdc981daa6b1d995f 100644
--- a/tests/lib/mirrors/relation_subclass_test.dart
+++ b/tests/lib/mirrors/relation_subclass_test.dart
@@ -57,12 +57,12 @@ test(MirrorSystem mirrors) {
   Expect.isFalse(Obj.isSubclassOf(Func));
 
   // Function typedef.
-  var NumPred = thisLibrary.declarations[#NumberPredicate];
-  var IntPred = thisLibrary.declarations[#IntegerPredicate];
-  var DubPred = thisLibrary.declarations[#DoublePredicate];
-  var NumGen = thisLibrary.declarations[#NumberGenerator];
-  var IntGen = thisLibrary.declarations[#IntegerGenerator];
-  var DubGen = thisLibrary.declarations[#DoubleGenerator];
+  var NumPred = reflectType(NumberPredicate);

[Johnni Winther, 2014/02/26 15:44:59]

Why this change?

[karlklose, 2014/02/27 08:41:02]

We do not preserve the typedef declarations in dart2js.
(https://code.google.com/p/dart/issues/detail?id=16939)

I will add a comment to change it back when we implement the feature.

+  var IntPred = reflectType(IntegerPredicate);
+  var DubPred = reflectType(DoublePredicate);
+  var NumGen = reflectType(NumberGenerator);
+  var IntGen = reflectType(IntegerGenerator);
+  var DubGen = reflectType(DoubleGenerator);
 
   isArgumentOrTypeError(e) => e is ArgumentError || e is TypeError;
   Expect.throws(() => Func.isSubclassOf(NumPred), isArgumentOrTypeError);