Move dart2jslib parts into separate libraries.

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;
+library dart2js.enqueue;
+
+import 'dart:collection' show
+    Queue;
+import 'dart2jslib.dart' show
+    invariant,
+    CodegenWorkItem,
+    Compiler,
+    CompilerTask,
+    DeferredAction,
+    DeferredTask,
+    ItemCompilationContext,
+    Registry,
+    ResolutionWorkItem,
+    WorkItem;
+import 'dart_types.dart' show
+    DartType,
+    InterfaceType;
+import 'elements/elements.dart' show
+    AnalyzableElement,
+    AstElement,
+    ClassElement,
+    ConstructorElement,
+    Element,
+    Elements,
+    FunctionElement,
+    LibraryElement,
+    LocalFunctionElement,
+    Member,
+    MemberElement,
+    MethodElement,
+    TypedElement,
+    TypedefElement;
+import 'js/js.dart' as js;
+import 'native/native.dart' as native;
+import 'resolution/resolution.dart' show
+    ResolverVisitor;
+import 'tree/tree.dart' show
+    Send;
+import 'universe/universe.dart';
+import 'util/util.dart' show
+    Link,
+    Setlet,
+    SpannableAssertionFailure;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
   final CodegenEnqueuer codegen;
 
   String get name => 'Enqueue';
 
   EnqueueTask(Compiler compiler)
@@ skipping 123 matching lines @@
   void processInstantiatedClassMembers(ClassElement cls) {
     cls.implementation.forEachMember(processInstantiatedClassMember);
   }
 
   void processInstantiatedClassMember(ClassElement cls, Element member) {
     assert(invariant(member, member.isDeclaration));
     if (isProcessed(member)) return;
     if (!member.isInstanceMember) return;
     String memberName = member.name;
 
-    if (member.kind == ElementKind.FIELD) {
+    if (member.isField) {
       // The obvious thing to test here would be "member.isNative",
       // however, that only works after metadata has been parsed/analyzed,
       // and that may not have happened yet.
       // So instead we use the enclosing class, which we know have had
       // its metadata parsed and analyzed.
       // Note: this assumes that there are no non-native fields on native
       // classes, which may not be the case when a native class is subclassed.
       if (cls.isNative) {
         compiler.world.registerUsedElement(member);
         nativeEnqueuer.handleFieldAnnotations(member);
@@ skipping 20 matching lines @@
         }
         // Native fields need to go into instanceMembersByName as they
         // are virtual instantiation points and escape points.
       } else {
         // All field initializers must be resolved as they could
         // have an observable side-effect (and cannot be tree-shaken
         // away).
         addToWorkList(member);
         return;
       }
-    } else if (member.kind == ElementKind.FUNCTION) {
+    } else if (member.isFunction) {
       FunctionElement function = member;
       function.computeType(compiler);
       if (function.name == Compiler.NO_SUCH_METHOD) {
         registerNoSuchMethod(function);
       }
       if (function.name == Compiler.CALL_OPERATOR_NAME &&
           !cls.typeVariables.isEmpty) {
         registerCallMethodWithFreeTypeVariables(
             function, compiler.globalDependencies);
       }
       // If there is a property access with the same name as a method we
       // need to emit the method.
       if (universe.hasInvokedGetter(function, compiler.world)) {
         registerClosurizedMember(function, compiler.globalDependencies);
         addToWorkList(function);
         return;
       }
       // Store the member in [instanceFunctionsByName] to catch
       // getters on the function.
       instanceFunctionsByName.putIfAbsent(memberName, () => new Set<Element>())
           .add(member);
       if (universe.hasInvocation(function, compiler.world)) {
         addToWorkList(function);
         return;
       }
-    } else if (member.kind == ElementKind.GETTER) {
+    } else if (member.isGetter) {
       FunctionElement getter = member;
       getter.computeType(compiler);
       if (universe.hasInvokedGetter(getter, compiler.world)) {
         addToWorkList(getter);
         return;
       }
       // We don't know what selectors the returned closure accepts. If
       // the set contains any selector we have to assume that it matches.
       if (universe.hasInvocation(getter, compiler.world)) {
         addToWorkList(getter);
         return;
       }
-    } else if (member.kind == ElementKind.SETTER) {
+    } else if (member.isSetter) {
       FunctionElement setter = member;
       setter.computeType(compiler);
       if (universe.hasInvokedSetter(setter, compiler.world)) {
         addToWorkList(setter);
         return;
       }
     }
 
     // The element is not yet used. Add it to the list of instance
     // members to still be processed.
@@ skipping 352 matching lines @@
 
   void registerFieldSetter(Element element) {
     universe.fieldSetters.add(element);
   }
 
   void registerIsCheck(DartType type) {
     type = universe.registerIsCheck(type, compiler);
     // Even in checked mode, type annotations for return type and argument
     // types do not imply type checks, so there should never be a check
     // against the type variable of a typedef.
-    assert(type.kind != TypeKind.TYPE_VARIABLE ||
+    assert(!type.isTypeVariable ||
            !type.element.enclosingElement.isTypedef);
   }
 
   void registerCallMethodWithFreeTypeVariables(
       Element element,
       Registry registry) {
     compiler.backend.registerCallMethodWithFreeTypeVariables(
         element, this, registry);
     universe.callMethodsWithFreeTypeVariables.add(element);
   }
@@ skipping 339 matching lines @@
   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);
 }