VM: Evaluate metadata on a class in the scope of its library not the scope of the class.

tests/lib/mirrors/metadata_scope_test.dart

+// Copyright (c) 2014, 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.
+
+library test.metadata_scope;
+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+
+class Annotation {
+  final contents;
+  const Annotation(this.contents);
+  toString() => "Annotation($contents)";
+}
+
+@Annotation(foo)  /// 01: compile-time error

[hausner, 2014/03/28 22:25:33]

Maybe a comment why this is a compile-time error? Is it because there is no
compile-time constant foo at top-level?

[rmacnak, 2014/03/28 22:36:58]

Done

+class A {
+  @Annotation(foo)
+  static foo() {}
+
+  @Annotation(foo)
+  static bar() {}
+}
+
+@Annotation(B.foo)
+class B {
+  @Annotation(B.foo)
+  static foo() {}
+
+  @Annotation(B.foo)
+  static bar() {}
+}
+
+baz() {}
+
+@Annotation(baz)

[hausner, 2014/03/28 22:25:33]

Comment to note that the baz in the metadata should resolve to the top-level
function, not the one in the class.

[rmacnak, 2014/03/28 22:36:58]

Done

+class C {
+  @Annotation(baz)
+  static baz() {}
+}
+
+checkMetadata(DeclarationMirror mirror, List expectedMetadata) {
+  Expect.listEquals(expectedMetadata.map(reflect).toList(), mirror.metadata);
+}
+
+main() {
+  reflectClass(A).metadata;
+  checkMetadata(reflectClass(A).declarations[#foo], [const Annotation(A.foo)]);
+  checkMetadata(reflectClass(A).declarations[#bar], [const Annotation(A.foo)]);
+  checkMetadata(reflectClass(B), [const Annotation(B.foo)]);
+  checkMetadata(reflectClass(B).declarations[#foo], [const Annotation(B.foo)]);
+  checkMetadata(reflectClass(B).declarations[#bar], [const Annotation(B.foo)]);
+  checkMetadata(reflectClass(C), [const Annotation(baz)]);
+  checkMetadata(reflectClass(C).declarations[#baz], [const Annotation(C.baz)]);
+}