Implement various getters on DillMember.

pkg/front_end/lib/src/fasta/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;
@@ skipping 12 matching lines @@
       : modifiers = computeModifiers(member),
         member = member,
         super(parent, member.fileOffset);
 
   Member get target => member;
 
   String get name => member.name.name;
 
   bool get isConstructor => member is Constructor;
 
-  bool get isFactory {
-    if (member is Procedure) {
-      Procedure procedure = member;
-      return procedure.kind == ProcedureKind.Factory;
-    } else {
-      return false;
-    }
+  ProcedureKind get kind {
+    final member = this.member;
+    return member is Procedure ? member.kind : null;
   }
+
+  bool get isRegularMethod => identical(ProcedureKind.Method, kind);
+
+  bool get isGetter => identical(ProcedureKind.Getter, kind);
+
+  bool get isSetter => identical(ProcedureKind.Setter, kind);
+
+  bool get isOperator => identical(ProcedureKind.Operator, kind);
+
+  bool get isFactory => identical(ProcedureKind.Factory, kind);
 }
 
 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;
 }