Fasta kernel builders.

pkg/fasta/lib/src/kernel/kernel_type_variable_builder.dart

Index: pkg/fasta/lib/src/kernel/kernel_type_variable_builder.dart
diff --git a/pkg/fasta/lib/src/kernel/kernel_type_variable_builder.dart b/pkg/fasta/lib/src/kernel/kernel_type_variable_builder.dart
new file mode 100644
index 0000000000000000000000000000000000000000..20f73265bbb9b053dddc13df2291cde7750b126d
--- /dev/null
+++ b/pkg/fasta/lib/src/kernel/kernel_type_variable_builder.dart
@@ -0,0 +1,51 @@
+// 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.kernel_type_variable_builder;
+
+import 'package:kernel/ast.dart' show
+    DartType,
+    DynamicType,
+    TypeParameter,
+    TypeParameterType;
+
+import '../errors.dart' show
+    inputError;
+
+import 'kernel_builder.dart' show
+    KernelInterfaceTypeBuilder,
+    KernelTypeBuilder,
+    TypeVariableBuilder;
+
+class KernelTypeVariableBuilder
+    extends TypeVariableBuilder<KernelTypeBuilder, DartType> {
+  final TypeParameter parameter;
+
+  KernelTypeVariableBuilder(String name, [KernelTypeBuilder bound])
+      : parameter = new TypeParameter(name, const DynamicType()),
+        super(name, bound);
+
+  DartType buildType(List<KernelTypeBuilder> arguments) {
+    if (arguments != null) {
+      return inputError(null, null,
+          "Can't use type arguments with type parameter $parameter");
+    } else {
+      return new TypeParameterType(parameter);
+    }
+  }
+
+  DartType buildTypesWithBuiltArguments(List<DartType> arguments) {
+    if (arguments != null) {
+      return inputError(null, null,
+          "Can't use type arguments with type parameter $parameter");
+    } else {
+      return buildType(null);
+    }
+  }
+
+  KernelTypeBuilder asTypeBuilder() {
+    return new KernelInterfaceTypeBuilder(name, null)
+        ..builder = this;
+  }
+}