Introduce ParameterStructure

pkg/compiler/lib/src/serialization/modelz.dart

 // Copyright (c) 2015, 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.
 
 /// Implementation of the element model used for deserialiation.
 ///
 /// These classes are created by [ElementDeserializer] triggered by the
 /// [Deserializer].
 
 library dart2js.serialization.modelz;
 
 import '../common.dart';
 import '../common/resolution.dart' show Resolution;
 import '../constants/constructors.dart';
 import '../constants/expressions.dart';
 import '../elements/resolution_types.dart';
 import '../elements/common.dart';
 import '../elements/elements.dart';
+import '../elements/entities.dart';
 import '../elements/modelx.dart' show FunctionSignatureX;
 import '../elements/visitor.dart';
 import '../io/source_file.dart';
 import '../ordered_typeset.dart';
 import '../resolution/class_members.dart' as class_members;
 import '../resolution/scope.dart' show Scope;
 import '../resolution/tree_elements.dart' show TreeElements;
 import '../script.dart';
 import '../serialization/constant_serialization.dart';
 import 'package:front_end/src/fasta/scanner.dart' show Token;
@@ skipping 814 matching lines @@
     }
     return _functionSignature;
   }
 
   List<ParameterElement> get parameters {
     if (_parameters == null) {
       _parameters = _decoder.getElements(Key.PARAMETERS, isOptional: true);
     }
     return _parameters;
   }
+
+  ParameterStructure get parameterStructure =>
+      functionSignature.parameterStructure;
 }
 
 abstract class FunctionTypedElementMixin
     implements FunctionElement, DeserializedElementZ {
   @override
   FunctionElement asFunctionElement() => this;
 
   @override
   bool get isExternal {
     return _decoder.getBool(Key.IS_EXTERNAL,
@@ skipping 603 matching lines @@
   Element get enclosingElement => enclosingClass;
 
   @override
   FunctionSignature get functionSignature {
     // TODO(johnniwinther): Ensure that the function signature (and with it the
     // function type) substitutes type variables correctly.
     return definingConstructor.functionSignature;
   }
 
   @override
+  ParameterStructure get parameterStructure {
+    return functionSignature.parameterStructure;
+  }
+
+  @override
   bool get hasFunctionSignature {
     return _unsupported('hasFunctionSignature');
   }
 
   @override
   ConstructorElement get immediateRedirectionTarget => null;
 
   @override
   bool get isCyclicRedirection => false;
 
@@ skipping 916 matching lines @@
   }
 
   @override
   Node get node => throw new UnsupportedError('${this}.node');
 
   @override
   bool get hasNode => false;
 
   String toString() => 'MetadataAnnotationZ(${constant.toDartText()})';
 }