Introduce ParameterStructure

pkg/compiler/lib/src/elements/modelx.dart

 // Copyright (c) 2013, 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 elements.modelx;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
 import '../common/resolution.dart' show Resolution, ParsingContext;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_constructors.dart';
 import '../constants/constructors.dart';
 import '../constants/expressions.dart';
 import '../diagnostics/messages.dart' show MessageTemplate;
 import '../ordered_typeset.dart' show OrderedTypeSet;
 import '../resolution/class_members.dart' show ClassMemberMixin;
 import '../resolution/resolution.dart' show AnalyzableElementX;
 import '../resolution/scope.dart'
     show ClassScope, LibraryScope, Scope, TypeDeclarationScope;
 import '../resolution/tree_elements.dart' show TreeElements;
 import '../resolution/typedefs.dart' show TypedefCyclicVisitor;
 import '../script.dart';
 import 'package:front_end/src/fasta/scanner.dart' show ErrorToken, Token;
 import 'package:front_end/src/fasta/scanner.dart' as Tokens show EOF_TOKEN;
 import '../tree/tree.dart';
 import '../util/util.dart';
 import 'common.dart';
 import 'elements.dart';
+import 'entities.dart';
 import 'resolution_types.dart';
 import 'visitor.dart' show ElementVisitor;
 
 /// Object that identifies a declaration site.
 ///
 /// For most elements, this is the element itself, but for variable declarations
 /// where multi-declarations like `var a, b, c` are allowed, the declaration
 /// site is a separate object.
 // TODO(johnniwinther): Add [beginToken] and [endToken] getters.
 abstract class DeclarationSite {}
@@ skipping 199 matching lines @@
 
   get asyncMarker => AsyncMarker.SYNC;
   Iterable<MetadataAnnotation> get metadata => unsupported();
   bool get hasNode => false;
   get node => unsupported();
   get hasResolvedAst => false;
   get resolvedAst => unsupported();
   get type => unsupported();
   get cachedNode => unsupported();
   get functionSignature => unsupported();
+  get parameterStructure => unsupported();
   get parameters => unsupported();
   get patch => null;
   get origin => this;
   get immediateRedirectionTarget => unsupported();
   get nestedClosures => unsupported();
   get memberContext => unsupported();
   get executableContext => unsupported();
   get isExternal => unsupported();
   get constantConstructor => null;
 
@@ skipping 169 matching lines @@
   set _functionSignatureCache(_) {
     throw new UnsupportedError("functionSignatureCache=");
   }
 
   @override
   set functionSignature(_) {
     throw new UnsupportedError("functionSignature=");
   }
 
   @override
+  get parameterStructure {
+    throw new UnsupportedError("parameterStructure");
+  }
+
+  @override
   get nestedClosures {
     throw new UnsupportedError("nestedClosures");
   }
 
   @override
   set nestedClosures(_) {
     throw new UnsupportedError("nestedClosures=");
   }
 
   @override
@@ skipping 1561 matching lines @@
       : super(name, kind, enclosing) {
     assert(modifiers != null);
   }
 
   bool get isExternal => modifiers.isExternal;
 
   bool get isInstanceMember {
     return isClassMember && !isConstructor && !isStatic;
   }
 
+  ParameterStructure get parameterStructure =>
+      functionSignature.parameterStructure;
+
   bool get hasFunctionSignature => _functionSignatureCache != null;
 
   void _computeSignature(Resolution resolution) {
     if (hasFunctionSignature) return;
     functionSignature = resolution.resolveSignature(this);
   }
 
   FunctionSignature get functionSignature {
     assert(invariant(this, hasFunctionSignature,
         message: "Function signature has not been computed for $this."));
@@ skipping 1452 matching lines @@
       body = node.asFunctionExpression().body;
     }
     return new ParsedResolvedAst(
         declaration,
         node,
         body,
         definingElement.treeElements,
         definingElement.compilationUnit.script.resourceUri);
   }
 }