Fasta kernel builders.

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

+// 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_field_builder;
+
+import 'package:kernel/ast.dart' show
+    DynamicType,
+    Expression,
+    Field,
+    Library,
+    Name;
+
+import 'kernel_builder.dart' show
+    FieldBuilder,
+    KernelTypeBuilder,
+    MetadataBuilder;
+
+class KernelFieldBuilder extends FieldBuilder<Expression> {
+  Field field;
+  final List<MetadataBuilder> metadata;
+  final KernelTypeBuilder type;
+
+  KernelFieldBuilder(this.metadata, this.type, String name, int modifiers)
+      : super(name, modifiers);
+
+  void set initializer(Expression value) {
+    field.initializer = value
+        ..parent = field;
+  }
+
+  Field build(Library library) {
+    return field ??= new Field(new Name(name, library),
+        type: type?.build() ?? const DynamicType(),
+        isFinal: isFinal, isConst: isConst, isStatic: isStatic || isTopLevel);
+  }
+
+  Field get target => field;
+}