Fasta builders.

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

Index: pkg/fasta/lib/src/builder/invalid_type_builder.dart
diff --git a/pkg/fasta/lib/src/builder/invalid_type_builder.dart b/pkg/fasta/lib/src/builder/invalid_type_builder.dart
new file mode 100644
index 0000000000000000000000000000000000000000..77f10fedf8a28bcc177d8c9d2ea7bc13a7f14ced
--- /dev/null
+++ b/pkg/fasta/lib/src/builder/invalid_type_builder.dart
@@ -0,0 +1,16 @@
+// 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.invalid_type_builder;
+
+import 'builder.dart' show
+    Builder,
+    TypeBuilder,
+    TypeDeclarationBuilder;
+
+abstract class InvalidTypeBuilder<T extends TypeBuilder, R>
+    extends TypeDeclarationBuilder<T, R> {
+  InvalidTypeBuilder(String name, Builder parent)
+      : super(null, 0, name, null, parent);
+}