Record names of constructors and use that to implement Object.toString.

dart/frog/tests/leg_only/src/ToStringTest.dart

Index: dart/frog/tests/leg_only/src/ToStringTest.dart
diff --git a/dart/frog/tests/leg_only/src/ToStringTest.dart b/dart/frog/tests/leg_only/src/ToStringTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..6b599c0f5844a822e22f73dcde560740af6c0c61
--- /dev/null
+++ b/dart/frog/tests/leg_only/src/ToStringTest.dart
@@ -0,0 +1,11 @@
+// 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.
+
+class A extends Object {
+}
+
+main() {
+  Expect.equals("[Instance of 'Object']", new Object().toString());
+  Expect.equals("[Instance of 'A']", new A().toString());

[Lasse Reichstein, 2012/01/11 09:49:16]

If List.toString should return "Instance of 'List'", then test that here too,
just for good measure (even though it goes through the interceptor).

+}