Fasta builders.

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

Index: pkg/fasta/lib/src/builder/type_variable_builder.dart
diff --git a/pkg/fasta/lib/src/builder/type_variable_builder.dart b/pkg/fasta/lib/src/builder/type_variable_builder.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2408441ebc309790ab342c4bafbacd756f0e592d
--- /dev/null
+++ b/pkg/fasta/lib/src/builder/type_variable_builder.dart
@@ -0,0 +1,30 @@
+// 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.type_variable_builder;
+
+import 'builder.dart' show
+    TypeBuilder,
+    TypeDeclarationBuilder;
+
+abstract class TypeVariableBuilder<T extends TypeBuilder, R>
+    extends TypeDeclarationBuilder<T, R> {
+  T bound;
+
+  TypeVariableBuilder(String name, this.bound)
+      : super(null, null, name, null, null);
+
+  String get debugName => "TypeVariableBuilder";
+
+  StringBuffer printOn(StringBuffer buffer) {
+    buffer.write(name);
+    if (bound != null) {
+      buffer.write(" extends ");
+      bound.printOn(buffer);
+    }
+    return buffer;
+  }
+
+  String toString() => "${printOn(new StringBuffer())}";
+}