Support closures inside initializers.

tests/language/closure_in_initializer2_test.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.
+

[ahe, 2012/11/06 15:14:22]

What does this test do?

+class S {
+  S() {
+    Expect.equals(2, this.f());

[ahe, 2012/11/06 15:14:22]

This is a static warning. Consider adding an abstract getter.

+  }
+}
+
+class A extends S {
+  var f;
+  A(a) : f = (() => ++a) {
+    Expect.equals(a, 2);
+  }
+}
+
+main() {
+  var a = new A(1);
+  Expect.equals(a.f(), 3);
+}