Incremental compiler: support optional arguments.

dart/pkg/compiler/lib/src/enqueue.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;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
@@ skipping 794 matching lines @@
 }
 
 /// [Enqueuer] which is specific to code generation.
 class CodegenEnqueuer extends Enqueuer {
   final Queue<CodegenWorkItem> queue;
   final Map<Element, js.Expression> generatedCode =
       new Map<Element, js.Expression>();
 
   final Set<Element> newlyEnqueuedElements;
 
+  final Set<Selector> newlySeenSelectors;
+
   CodegenEnqueuer(Compiler compiler,
                   ItemCompilationContext itemCompilationContextCreator())
       : queue = new Queue<CodegenWorkItem>(),
         newlyEnqueuedElements = compiler.cacheStrategy.newSet(),
+        newlySeenSelectors = compiler.cacheStrategy.newSet(),
         super('codegen enqueuer', compiler, itemCompilationContextCreator);
 
   bool isProcessed(Element member) =>
       member.isAbstract || generatedCode.containsKey(member);
 
   /**
    * Decides whether an element should be included to satisfy requirements
    * of the mirror system.
    *
    * For code generation, we rely on the precomputed set of elements that takes
@@ skipping 39 matching lines @@
     super.forgetElement(element);
     generatedCode.remove(element);
     if (element is MemberElement) {
       for (Element closure in element.nestedClosures) {
         generatedCode.remove(closure);
         removeFromSet(instanceMembersByName, closure);
         removeFromSet(instanceFunctionsByName, closure);
       }
     }
   }
+
+  void handleUnseenSelector(String methodName, Selector selector) {
+    if (compiler.hasIncrementalSupport) {
+      newlySeenSelectors.add(selector);
+    }
+    super.handleUnseenSelector(methodName, selector);
+  }
 }
 
 /// Parameterizes filtering of which work items are enqueued.
 class QueueFilter {
   bool checkNoEnqueuedInvokedInstanceMethods(Enqueuer enqueuer) {
     enqueuer.task.measure(() {
       // Run through the classes and see if we need to compile methods.
       for (ClassElement classElement in
                enqueuer.universe.directlyInstantiatedClasses) {
         for (ClassElement currentClass = classElement;
              currentClass != null;
              currentClass = currentClass.superclass) {
           enqueuer.processInstantiatedClassMembers(currentClass);
         }
       }
     });
     return true;
   }
 
   void processWorkItem(void f(WorkItem work), WorkItem work) {
     f(work);
   }
 }
 
 void removeFromSet(Map<String, Set<Element>> map, Element element) {
   Set<Element> set = map[element.name];
   if (set == null) return;
   set.remove(element);
 }