Implementation of null-aware operators.

pkg/compiler/lib/src/resolved_visitor.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.
 
 part of dart2js;
 
 /// Enum for the visit methods added in [ResolvedVisitor].
 // TODO(johnniwinther): Remove this.
 enum ResolvedKind {
   ASSERT,
@@ skipping 557 matching lines @@
   @override
   R visitIsNot(
       Send node,
       Node expression,
       DartType type,
       ResolvedKindVisitor<R> visitor) {
     return visitor.visitOperatorSend(node);
   }
 
   @override
+  R visitIfNull(
+      Send node,
+      Node left,
+      Node right,
+      ResolvedKindVisitor<R> visitor) {
+    return visitor.visitOperatorSend(node);
+  }
+
+  @override
   R visitLogicalAnd(
       Send node,
       Node left,
       Node right,
       ResolvedKindVisitor<R> visitor) {
     return visitor.visitOperatorSend(node);
   }
 
   @override
   R visitLogicalOr(
@@ skipping 34 matching lines @@
   R visitDynamicPropertyInvoke(
       Send node,
       Node receiver,
       NodeList arguments,
       Selector selector,
       ResolvedKindVisitor<R> visitor) {
     return visitor.visitDynamicSend(node);
   }
 
   @override
+  R visitIfNotNullDynamicPropertyInvoke(
+      Send node,
+      Node receiver,
+      NodeList arguments,
+      Selector selector,
+      ResolvedKindVisitor<R> visitor) {
+    return visitor.visitDynamicSend(node);
+  }
+
+  @override
   R visitThisPropertyInvoke(
       Send node,
       NodeList arguments,
       Selector selector,
       ResolvedKindVisitor<R> visitor) {
     return visitor.visitDynamicSend(node);
   }
 
   @override
   R visitExpressionInvoke(
@@ skipping 127 matching lines @@
 
   @override
   R visitSuperIndex(
       Send node,
       FunctionElement function,
       Node index,
       ResolvedKindVisitor<R> visitor) {
     return visitor.visitSuperSend(node);
   }
 }