Fasta dill builders.

pkg/fasta/lib/src/dill/dill_member_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.dill_member_builder;
+
+import 'package:kernel/ast.dart' show
+    Constructor,
+    Field,
+    Member,
+    Procedure,
+    ProcedureKind;
+
+import '../errors.dart' show
+    internalError;
+
+import '../kernel/kernel_builder.dart' show
+    Builder,
+    MemberBuilder;
+
+import '../modifier.dart' show
+    abstractMask,
+    constMask,
+    externalMask,
+    finalMask,
+    staticMask;
+
+class DillMemberBuilder extends MemberBuilder {
+  final int modifiers;
+
+  final Member member;
+
+  final Builder parent;
+
+  DillMemberBuilder(Member member, this.parent)
+      : modifiers = computeModifiers(member),
+        member = member;
+
+  Member get target => member;
+
+  bool get isConstructor => member is Constructor;
+
+  bool get isFactory {
+    if (member is Procedure) {
+      Procedure procedure = member;
+      return procedure.kind == ProcedureKind.Factory;
+    } else {
+      return false;
+    }
+  }
+}
+
+int computeModifiers(Member member) {
+  int modifier = member.isAbstract ? abstractMask : 0;
+  modifier |= member.isExternal ? externalMask : 0;
+  if (member is Field) {
+    modifier |= member.isConst ? constMask : 0;
+    modifier |= member.isFinal ? finalMask : 0;
+    modifier |= member.isStatic ? staticMask : 0;
+  } else if (member is Procedure) {
+    modifier |= member.isConst ? constMask : 0;
+    modifier |= member.isStatic ? staticMask : 0;
+  } else if (member is Constructor) {
+    modifier |= member.isConst ? constMask : 0;
+  } else {
+    internalError("Unhandled: ${member.runtimeType}");
+  }
+  return modifier;
+}