Implement super operators.

pkg/front_end/lib/src/fasta/kernel/builder_accessors.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.builder_accessors;
 
 export 'frontend_accessors.dart' show
     wrapInvalid;
 
 import 'frontend_accessors.dart' show
     Accessor;
 
 import 'package:kernel/ast.dart';
 
 import 'package:kernel/core_types.dart' show
     CoreTypes;
 
 import '../errors.dart' show
     InputError,
     internalError;
 
 import 'frontend_accessors.dart' as kernel show
     IndexAccessor,
     NullAwarePropertyAccessor,
     PropertyAccessor,
     StaticAccessor,
+    SuperIndexAccessor,
     SuperPropertyAccessor,
     ThisIndexAccessor,
     ThisPropertyAccessor,
     VariableAccessor;
 
 import 'frontend_accessors.dart' show
     buildIsNull,
     makeLet;
 
 import 'kernel_builder.dart' show
@@ skipping 580 matching lines @@
   String get plainNameForWrite => "[]=";
 
   Expression doInvocation(int charOffset, Arguments arguments) {
     return buildMethodInvocation(buildSimpleRead(), new Name("call"), arguments,
         charOffset);
   }
 
   toString() => "ThisIndexAccessor()";
 }
 
+class SuperIndexAccessor
+    extends kernel.SuperIndexAccessor with BuilderAccessor {
+  final BuilderHelper helper;
+
+  final int charOffset;
+
+  SuperIndexAccessor(this.helper, this.charOffset, Expression index,
+      Member getter, Member setter)
+      : super(index, getter, setter);
+
+  String get plainNameForRead => "[]";
+
+  String get plainNameForWrite => "[]=";
+
+  Expression doInvocation(int charOffset, Arguments arguments) {
+    return buildMethodInvocation(buildSimpleRead(), new Name("call"), arguments,
+        charOffset);
+  }
+
+  toString() => "SuperIndexAccessor()";
+}
+
 class ThisPropertyAccessor extends kernel.ThisPropertyAccessor
     with BuilderAccessor {
   final BuilderHelper helper;
 
   final int charOffset;
 
   ThisPropertyAccessor(this.helper, this.charOffset, Name name, Member getter,
       Member setter)
       : super(name, getter, setter);
 
@@ skipping 87 matching lines @@
             buildIsNull(new VariableGet(variable)),
             new NullLiteral(),
             new MethodInvocation(new VariableGet(variable), name, arguments)
                 ..fileOffset = charOffset,
             const DynamicType()));
   } else {
     return new MethodInvocation(receiver, name, arguments)
         ..fileOffset = charOffset;
   }
 }