Support parameter access in analyzer2dart.

sdk/lib/_internal/compiler/implementation/elements/elements.dart

 // Copyright (c) 2012, 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;
 
 
 import '../tree/tree.dart';
 import '../util/util.dart';
 import '../resolution/resolution.dart';
@@ skipping 315 matching lines @@
   bool get isConst;
 
   /// `true` if this element is a top level or local variable, static or
   /// instance field, or parameter that is declared `final`.
   bool get isFinal;
 
   /// `true` if this element is a method, getter, setter or field that
   /// is declared `static`.
   bool get isStatic;
 
+  /// `true` if this element is local element, that is, a local variable,
+  /// local function or parameter.
+  bool get isLocal;
+
   bool get impliesType;
 
   Token get position;
 
   CompilationUnitElement get compilationUnit;
   LibraryElement get library;
   LibraryElement get implementationLibrary;
   ClassElement get enclosingClass;
   Element get enclosingClassOrCompilationUnit;
   Element get outermostEnclosingMemberOrTopLevel;
@@ skipping 90 matching lines @@
     }
     return element;
   }
 
   static bool isClass(Element e) => e != null && e.kind == ElementKind.CLASS;
   static bool isTypedef(Element e) {
     return e != null && e.kind == ElementKind.TYPEDEF;
   }
 
   static bool isLocal(Element element) {
-    return !Elements.isUnresolved(element)
-            && !element.isInstanceMember
-            && !isStaticOrTopLevelField(element)
-            && !isStaticOrTopLevelFunction(element)
-            && (identical(element.kind, ElementKind.VARIABLE) ||
-                identical(element.kind, ElementKind.PARAMETER) ||
-                identical(element.kind, ElementKind.FUNCTION));
+    return !Elements.isUnresolved(element) && element.isLocal;
   }
 
   static bool isInstanceField(Element element) {
     return !Elements.isUnresolved(element)
            && element.isInstanceMember
            && (identical(element.kind, ElementKind.FIELD)
                || identical(element.kind, ElementKind.GETTER)
                || identical(element.kind, ElementKind.SETTER));
   }
 
@@ skipping 580 matching lines @@
   VariableDefinitions get node;
 }
 
 /// A formal parameter of a function or constructor.
 ///
 /// Normal parameter that introduce a local variable are modeled by
 /// [LocalParameterElement] whereas initializing formals, that is parameter of
 /// the form `this.x`, are modeled by [InitializingFormalParameter].
 abstract class ParameterElement extends Element
     implements VariableElement, FormalElement, LocalElement {
+  /// Use [functionDeclaration] instead.
+  @deprecated
+  get enclosingElement;
+
   /// The function on which this parameter is declared.
   FunctionElement get functionDeclaration;
 }
 
 /// A formal parameter on a function or constructor that introduces a local
 /// variable in the scope of the function or constructor.
 abstract class LocalParameterElement extends ParameterElement
     implements LocalVariableElement {
 }
 
@@ skipping 493 matching lines @@
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }