Handle constructor declarations.

pkg/compiler/lib/src/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.
 
 library dart2js.resolution.members;
 
 import '../common.dart';
 import '../common/names.dart' show Selectors;
 import '../common/resolution.dart' show Resolution;
 import '../compile_time_constants.dart';
@@ skipping 3427 matching lines @@
         // through the send structure.
         registry.useElement(node, semantics.setter);
         registry.useElement(node.selector, semantics.getter);
 
         // TODO(23998): Remove these when selectors are only accessed
         // through the send structure.
         registry.setGetterSelectorInComplexSendSet(node, getterSelector);
         registry.setSelector(node, setterSelector);
         registry.setOperatorSelectorInComplexSendSet(node, operatorSelector);
 
-        registry.registerDynamicUse(new DynamicUse(operatorSelector, null));
-
         SendStructure sendStructure;
         if (operator.kind == AssignmentOperatorKind.IF_NULL) {
+          registry.registerConstantLiteral(new NullConstantExpression());
+          registry.registerDynamicUse(new DynamicUse(Selectors.equals, null));
           sendStructure = new SetIfNullStructure(semantics);
         } else {
+          registry.registerDynamicUse(new DynamicUse(operatorSelector, null));
           sendStructure = new CompoundStructure(semantics, operator);
         }
         registry.registerSendStructure(node, sendStructure);
       }
     }
     return new ResolutionResult.forElement(semantics.setter);
   }
 
   ResolutionResult visitSendSet(SendSet node) {
     if (node.isIndex) {
@@ skipping 417 matching lines @@
                     type),
                 selector));
         return new ResolutionResult.forElement(constructor);
     }
 
     if (!isInvalid) {
       // [constructor] might be the implementation element
       // and only declaration elements may be registered.
       // TODO(johniwinther): Avoid registration of `type` in face of redirecting
       // factory constructors.
-      registry.registerStaticUse(
-          node.isConst
-              ? new StaticUse.constConstructorInvoke(
+      registry.registerStaticUse(node.isConst
+          ? new StaticUse.constConstructorInvoke(
               constructor.declaration, callStructure, type)
-              : new StaticUse.typedConstructorInvoke(
+          : new StaticUse.typedConstructorInvoke(
               constructor.declaration, callStructure, type));
       InterfaceType interfaceType = type;
       if (interfaceType.typeArguments.any((DartType type) => !type.isDynamic)) {
         registry.registerFeature(Feature.TYPE_VARIABLE_BOUNDS_CHECK);
       }
     }
 
     ResolutionResult resolutionResult = const NoneResult();
     if (node.isConst) {
       bool isValidAsConstant = !isInvalid && constructor.isConst;
@@ skipping 837 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(
     DiagnosticReporter reporter, Node node, Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), reporter, node);
 }