Make Enqueuer a pure interface.

pkg/compiler/lib/src/compiler.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.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'cache_strategy.dart' show CacheStrategy;
@@ skipping 19 matching lines @@
 import 'dart_types.dart' show DartType, DynamicType, InterfaceType, Types;
 import 'deferred_load.dart' show DeferredLoadTask;
 import 'diagnostics/code_location.dart';
 import 'diagnostics/diagnostic_listener.dart' show DiagnosticReporter;
 import 'diagnostics/invariant.dart' show REPORT_EXCESS_RESOLUTION;
 import 'diagnostics/messages.dart' show Message, MessageTemplate;
 import 'dump_info.dart' show DumpInfoTask;
 import 'elements/elements.dart';
 import 'elements/modelx.dart' show ErroneousElementX;
 import 'enqueue.dart'
-    show
-        CodegenEnqueuer,
-        Enqueuer,
-        EnqueueTask,
-        ResolutionEnqueuer,
-        QueueFilter;
+    show Enqueuer, EnqueueTask, ResolutionEnqueuer, QueueFilter;
 import 'environment.dart';
 import 'id_generator.dart';
 import 'io/source_information.dart' show SourceInformation;
 import 'js_backend/backend_helpers.dart' as js_backend show BackendHelpers;
 import 'js_backend/js_backend.dart' as js_backend show JavaScriptBackend;
 import 'library_loader.dart'
     show
         ElementScanner,
         LibraryLoader,
         LibraryLoaderTask,
@@ skipping 816 matching lines @@
    * were resolved, but not compiled (aka excess resolution).
    */
   checkQueues() {
     for (Enqueuer world in [enqueuer.resolution, enqueuer.codegen]) {
       world.forEach((WorkItem work) {
         reporter.internalError(work.element, "Work list is not empty.");
       });
     }
     if (!REPORT_EXCESS_RESOLUTION) return;
     var resolved = new Set.from(enqueuer.resolution.processedElements);
-    for (Element e in enqueuer.codegen.generatedCode.keys) {
+    for (Element e in enqueuer.codegen.processedEntities) {
       resolved.remove(e);
     }
     for (Element e in new Set.from(resolved)) {
       if (e.isClass ||
           e.isField ||
           e.isTypeVariable ||
           e.isTypedef ||
           identical(e.kind, ElementKind.ABSTRACT_FIELD)) {
         resolved.remove(e);
       }
@@ skipping 45 matching lines @@
         }
         AstElement element = work.element;
         if (world.hasBeenProcessed(element)) {
           return const WorldImpact();
         }
         WorldImpact worldImpact = analyzeElement(element);
         world.registerProcessedElement(element);
         return worldImpact;
       });
 
-  WorldImpact codegen(CodegenWorkItem work, CodegenEnqueuer world) {
+  WorldImpact codegen(CodegenWorkItem work, Enqueuer world) {
     assert(invariant(work.element, identical(world, enqueuer.codegen)));
     if (shouldPrintProgress) {
       // TODO(ahe): Add structured diagnostics to the compiler API and
       // use it to separate this from the --verbose option.
-      reporter
-          .log('Compiled ${enqueuer.codegen.generatedCode.length} methods.');
+      reporter.log(
+          'Compiled ${enqueuer.codegen.processedEntities.length} methods.');
       progress.reset();
     }
     return backend.codegen(work);
   }
 
   void reportDiagnostic(DiagnosticMessage message,
       List<DiagnosticMessage> infos, api.Diagnostic kind);
 
   void reportCrashInUserCode(String message, exception, stackTrace) {
     reporter.onCrashInUserCode(message, exception, stackTrace);
@@ skipping 1271 matching lines @@
   _ElementScanner(this.scanner);
   void scanLibrary(LibraryElement library) => scanner.scanLibrary(library);
   void scanUnit(CompilationUnitElement unit) => scanner.scan(unit);
 }
 
 class _EmptyEnvironment implements Environment {
   const _EmptyEnvironment();
 
   String valueOf(String key) => null;
 }