Support serialization of loadLibrary

pkg/compiler/lib/src/serialization/element_serialization.dart

 // Copyright (c) 2015, 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.serialization.elements;
 
 import '../common.dart';
+import '../common/names.dart';
 import '../constants/constructors.dart';
 import '../constants/expressions.dart';
 import '../dart_types.dart';
 import '../diagnostics/messages.dart';
 import '../elements/elements.dart';
-import '../elements/modelx.dart' show ErroneousElementX;
+import '../elements/modelx.dart'
+    show DeferredLoaderGetterElementX, ErroneousElementX;
 import 'constant_serialization.dart';
 import 'keys.dart';
 import 'modelz.dart';
 import 'serialization.dart';
 import 'serialization_util.dart';
 
 /// Enum kinds used for encoding [Element]s.
 enum SerializedElementKind {
   ERROR,
   LIBRARY,
@@ skipping 20 matching lines @@
   INSTANCE_GETTER,
   INSTANCE_SETTER,
   LOCAL_FUNCTION,
   TYPEDEF,
   TYPEVARIABLE,
   PARAMETER,
   INITIALIZING_FORMAL,
   IMPORT,
   EXPORT,
   PREFIX,
+  DEFERRED_LOAD_LIBRARY,
   LOCAL_VARIABLE,
   EXTERNAL_LIBRARY,
   EXTERNAL_LIBRARY_MEMBER,
   EXTERNAL_CLASS_MEMBER,
   EXTERNAL_CONSTRUCTOR,
 }
 
 /// Set of serializers used to serialize different kinds of elements by
 /// encoding into them into [ObjectEncoder]s.
 ///
 /// This class is called from the [Serializer] when an [Element] needs
 /// serialization. The [ObjectEncoder] ensures that any [Element], [DartType],
 /// and [ConstantExpression] that the serialized [Element] depends upon are also
 /// serialized.
 const List<ElementSerializer> ELEMENT_SERIALIZERS = const [
   const ErrorSerializer(),
   const LibrarySerializer(),
   const CompilationUnitSerializer(),
+  const PrefixSerializer(),
+  const DeferredLoadLibrarySerializer(),
   const ClassSerializer(),
   const ConstructorSerializer(),
   const FieldSerializer(),
   const FunctionSerializer(),
   const TypedefSerializer(),
   const TypeVariableSerializer(),
   const ParameterSerializer(),
   const ImportSerializer(),
   const ExportSerializer(),
-  const PrefixSerializer(),
   const LocalVariableSerializer(),
 ];
 
 /// Interface for a function that can serialize a set of element kinds.
 abstract class ElementSerializer {
   /// Returns the [SerializedElementKind] for [element] if this serializer
   /// supports serialization of [element] or `null` otherwise.
   SerializedElementKind getSerializedKind(Element element);
 
   /// Serializes [element] into the [encoder] using the [kind] computed
@@ skipping 401 matching lines @@
       EnumConstantElement enumConstant = element;
       encoder.setInt(Key.INDEX, enumConstant.index);
     }
   }
 }
 
 class FunctionSerializer implements ElementSerializer {
   const FunctionSerializer();
 
   SerializedElementKind getSerializedKind(Element element) {
+    if (element.isDeferredLoaderGetter) {
+      return null;
+    }
     if (element.isFunction) {
       if (element.isTopLevel) return SerializedElementKind.TOPLEVEL_FUNCTION;
       if (element.isStatic) return SerializedElementKind.STATIC_FUNCTION;
       if (element.isInstanceMember) {
         return SerializedElementKind.INSTANCE_FUNCTION;
       }
       if (element.isLocal) {
         return SerializedElementKind.LOCAL_FUNCTION;
       }
     }
@@ skipping 193 matching lines @@
       return SerializedElementKind.PREFIX;
     }
     return null;
   }
 
   void serialize(PrefixElement element, ObjectEncoder encoder,
       SerializedElementKind kind) {
     encoder.setString(Key.NAME, element.name);
     encoder.setElement(Key.LIBRARY, element.library);
     encoder.setElement(Key.COMPILATION_UNIT, element.compilationUnit);
-    if (element.deferredImport != null) {
+    encoder.setBool(Key.IS_DEFERRED, element.isDeferred);
+    if (element.isDeferred) {
       encoder.setElement(Key.IMPORT, element.deferredImport);
+      encoder.setElement(Key.GETTER, element.loadLibrary);
     }
-    encoder.setBool(Key.IS_DEFERRED, element.isDeferred);
   }
 }
 
+class DeferredLoadLibrarySerializer implements ElementSerializer {
+  const DeferredLoadLibrarySerializer();
+
+  SerializedElementKind getSerializedKind(Element element) {
+    if (element.isDeferredLoaderGetter) {
+      return SerializedElementKind.DEFERRED_LOAD_LIBRARY;
+    }
+    return null;
+  }
+
+  void serialize(GetterElement element, ObjectEncoder encoder,
+      SerializedElementKind kind) {
+    encoder.setElement(Key.PREFIX, element.enclosingElement);
+  }
+}
+
 /// Utility class for deserializing [Element]s.
 ///
 /// This is used by the [Deserializer].
 class ElementDeserializer {
   /// Deserializes an [Element] from an [ObjectDecoder].
   ///
   /// The class is called from the [Deserializer] when an [Element]
   /// needs deserialization. The [ObjectDecoder] ensures that any [Element],
   /// [DartType], and [ConstantExpression] that the deserialized [Element]
   /// depends upon are available.
@@ skipping 69 matching lines @@
       case SerializedElementKind.PARAMETER:
         return new LocalParameterElementZ(decoder);
       case SerializedElementKind.INITIALIZING_FORMAL:
         return new InitializingFormalElementZ(decoder);
       case SerializedElementKind.IMPORT:
         return new ImportElementZ(decoder);
       case SerializedElementKind.EXPORT:
         return new ExportElementZ(decoder);
       case SerializedElementKind.PREFIX:
         return new PrefixElementZ(decoder);
+      case SerializedElementKind.DEFERRED_LOAD_LIBRARY:
+        return new DeferredLoaderGetterElementX(decoder.getElement(Key.PREFIX));
       case SerializedElementKind.LOCAL_VARIABLE:
         return new LocalVariableElementZ(decoder);
       case SerializedElementKind.EXTERNAL_LIBRARY:
       case SerializedElementKind.EXTERNAL_LIBRARY_MEMBER:
       case SerializedElementKind.EXTERNAL_CLASS_MEMBER:
       case SerializedElementKind.EXTERNAL_CONSTRUCTOR:
         break;
     }
     throw new UnsupportedError("Unexpected element kind '${elementKind}.");
   }
 }