Clean up operator names.

dart/sdk/lib/_internal/compiler/implementation/resolution/members.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 resolution;
 
 abstract class TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   DartType getType(Node node);
@@ skipping 1597 matching lines @@
     // First determine if this is part of an assignment.
     bool isSet = node.asSendSet() != null;
 
     if (node.isIndex) {
       return isSet ? new Selector.indexSet() : new Selector.index();
     }
 
     if (node.isOperator) {
       SourceString source = node.selector.asOperator().source;
       String string = source.stringValue;
-      if (identical(string, '!')   || identical(string, '&&')  || string == '||' ||
-          identical(string, 'is')  || identical(string, 'as')  ||
+      if (identical(string, '!') ||
+          identical(string, '&&') || identical(string, '||') ||
+          identical(string, 'is') || identical(string, 'as') ||
           identical(string, '===') || identical(string, '!==') ||
+          identical(string, '?') ||
           identical(string, '>>>')) {
         return null;
       }
+      if (!isUserDefinableOperator(source.stringValue)) {
+        source = Elements.mapToUserOperator(source);
+      }
       return node.arguments.isEmpty
           ? new Selector.unaryOperator(source)
           : new Selector.binaryOperator(source);
     }
 
     Identifier identifier = node.selector.asIdentifier();
     if (node.isPropertyAccess) {
       assert(!isSet);
       return new Selector.getter(identifier.source, library);
     } else if (isSet) {
@@ skipping 1436 matching lines @@
     return e;
   }
 
   /// Assumed to be called by [resolveRedirectingFactory].
   Element visitReturn(Return node) {
     Node expression = node.expression;
     return finishConstructorReference(visit(expression),
                                       expression, expression);
   }
 }