Fasta builders.

pkg/fasta/lib/src/builder/member_builder.dart

Index: pkg/fasta/lib/src/builder/member_builder.dart
diff --git a/pkg/fasta/lib/src/builder/member_builder.dart b/pkg/fasta/lib/src/builder/member_builder.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f4cb6f1bfeea797284ae45a77f49b587c2fbce50
--- /dev/null
+++ b/pkg/fasta/lib/src/builder/member_builder.dart
@@ -0,0 +1,20 @@
+// Copyright (c) 2016, 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 fasta.member_builder;
+
+import 'builder.dart' show
+    Builder,
+    ClassBuilder,
+    ModifierBuilder;
+
+abstract class MemberBuilder extends ModifierBuilder {
+  Builder parent;
+
+  bool get isInstanceMember => isClassMember && !isStatic;
+
+  bool get isClassMember => parent is ClassBuilder;
+
+  bool get isTopLevel => !isClassMember;
+}