dart2js: Add support for static fields to new emitter.

sdk/lib/_internal/compiler/implementation/js_emitter/program_builder.dart

 // Copyright (c) 2014, 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.js_emitter.program_builder;
 
 import 'model.dart';
 import '../common.dart';
 import '../js/js.dart' as js;
 
-import '../js_backend/js_backend.dart' show Namer, JavaScriptBackend;
+import '../js_backend/js_backend.dart' show
+    Namer,
+    JavaScriptBackend,
+    JavaScriptConstantCompiler;
+
 import '../js_emitter/js_emitter.dart' as emitterTask show
     CodeEmitterTask,
     Emitter;
 
 import '../universe/universe.dart' show Universe;
 import '../deferred_load.dart' show DeferredLoadTask, OutputUnit;
 
 part 'registry.dart';
 
 class ProgramBuilder {
@@ skipping 20 matching lines @@
   /// generate the deferredLoadingMap (to know which hunks to load).
   final Map<OutputUnit, Output> _outputs = <OutputUnit, Output>{};
 
   /// Mapping from [ConstantValue] to constructed [Constant]. We need this to
   /// update field-initializers to point to the ConstantModel.
   final Map<ConstantValue, Constant> _constants = <ConstantValue, Constant>{};
 
   Program buildProgram() {
     _task.outputClassLists.forEach(_registry.registerElements);
     _task.outputStaticLists.forEach(_registry.registerElements);
+    _task.outputConstantLists.forEach(_registerConstants);
 
     // TODO(kasperl): There's code that implicitly needs access to the special
     // $ holder so we have to register that. Can we track if we have to?
     _registry.registerHolder(r'$');
 
     MainOutput mainOutput = _buildMainOutput(_registry.mainFragment);
     Iterable<Output> deferredOutputs = _registry.deferredFragments
         .map((fragment) => _buildDeferredOutput(mainOutput, fragment));
 
     List<Output> outputs = new List<Output>(_registry.fragmentCount);
@@ skipping 27 matching lines @@
     });
     return loadMap;
   }
 
   MainOutput _buildMainOutput(Fragment fragment) {
     // Construct the main output from the libraries and the registered holders.
     MainOutput result = new MainOutput(
         "",  // The empty string is the name for the main output file.
         namer.elementAccess(_compiler.mainFunction),
         _buildLibraries(fragment),
+        _buildStaticNonFinalFields(fragment),
         _buildConstants(fragment),
         _registry.holders.toList(growable: false));
     _outputs[fragment.outputUnit] = result;
     return result;
   }
 
   /// Returns a name composed of the main output file name and [name].
   String _outputFileName(String name) {
     assert(name != "");
     String outPath = _compiler.outputUri != null
         ? _compiler.outputUri.path
         : "out";
     String outName = outPath.substring(outPath.lastIndexOf('/') + 1);
     return "${outName}_$name";
   }
 
   DeferredOutput _buildDeferredOutput(MainOutput mainOutput,
                                       Fragment fragment) {
     DeferredOutput result = new DeferredOutput(
         _outputFileName(fragment.name), fragment.name,
         mainOutput,
         _buildLibraries(fragment),
+        _buildStaticNonFinalFields(fragment),
         _buildConstants(fragment));
     _outputs[fragment.outputUnit] = result;
     return result;
   }
 
   List<Constant> _buildConstants(Fragment fragment) {
     List<ConstantValue> constantValues =
         _task.outputConstantLists[fragment.outputUnit];
     if (constantValues == null) return const <Constant>[];
-    return constantValues.map((ConstantValue constantValue) {
-      assert(!_constants.containsKey(constantValue));
-      String name = namer.constantName(constantValue);
-      String constantObject = namer.globalObjectForConstant(constantValue);
-      Holder holder = _registry.registerHolder(constantObject);
-      Constant constant = new Constant(name, holder, constantValue);
-      _constants[constantValue] = constant;
-      return constant;
-    }).toList();
+    return constantValues.map((ConstantValue value) => _constants[value])
+        .toList(growable: false);
+  }
+
+  List<StaticField> _buildStaticNonFinalFields(Fragment fragment) {
+    // TODO(floitsch): handle static non-final fields correctly with deferred
+    // libraries.
+    if (fragment != _registry.mainFragment) return const <StaticField>[];
+    Iterable<VariableElement> staticNonFinalFields =
+        backend.constants.getStaticNonFinalFieldsForEmission();
+    return Elements.sortedByPosition(staticNonFinalFields)
+        .map(_buildStaticField)
+        .toList(growable: false);
+  }
+
+  StaticField _buildStaticField(Element element) {
+    JavaScriptConstantCompiler handler = backend.constants;
+    ConstantValue initialValue = handler.getInitialValueFor(element).value;
+    js.Expression code = _task.emitter.constantReference(initialValue);
+    String name = namer.getNameOfGlobalField(element);
+    bool isFinal = false;
+    bool isLazy = false;
+    return new StaticField(name, _registry.registerHolder(r'$'), code,
+                           isFinal, isLazy);
+  }
+
+  List<StaticField> _buildStaticLazilyInitializedFields(Fragment fragment) {
+    JavaScriptConstantCompiler handler = backend.constants;
+    List<VariableElement> lazyFields =
+        handler.getLazilyInitializedFieldsForEmission();
+    // TODO(floitsch): handle static lazy finals correctly with deferred
+    // libraries.
+    if (fragment != _registry.mainFragment) return const <StaticField>[];
+    throw new UnimplementedError("lazy statics");
   }
 
   List<Library> _buildLibraries(Fragment fragment) {
     List<Library> libraries = new List<Library>(fragment.length);
     int count = 0;
     fragment.forEach((LibraryElement library, List<Element> elements) {
       libraries[count++] = _buildLibrary(library, elements);
     });
     return libraries;
   }
@@ skipping 50 matching lines @@
     return new StaticMethod(name, _registry.registerHolder(holder), code);
   }
 
   StaticMethod _buildStaticMethodTearOff(FunctionElement element) {
     String name = namer.getStaticClosureName(element);
     String holder = namer.globalObjectFor(element);
     // TODO(kasperl): This clearly doesn't work yet.
     js.Expression code = js.string("<<unimplemented>>");
     return new StaticMethod(name, _registry.registerHolder(holder), code);
   }
+
+  void _registerConstants(OutputUnit outputUnit,
+                          List<ConstantValue> constantValues) {
+    if (constantValues == null) return;
+    for (ConstantValue constantValue in constantValues) {
+      assert(!_constants.containsKey(constantValue));
+      String name = namer.constantName(constantValue);
+      String constantObject = namer.globalObjectForConstant(constantValue);
+      Holder holder = _registry.registerHolder(constantObject);
+      Constant constant = new Constant(name, holder, constantValue);
+      _constants[constantValue] = constant;
+    };
+  }
 }