Handle fields with initializers in constant constructors.

pkg/compiler/lib/src/resolution/resolution.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.resolution;
 
 import 'dart:collection' show Queue;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
@@ skipping 35 matching lines @@
 import '../tree/tree.dart';
 import '../universe/call_structure.dart' show CallStructure;
 import '../universe/use.dart' show StaticUse, TypeUse;
 import '../universe/world_impact.dart' show WorldImpact;
 import '../util/util.dart' show Link, Setlet;
 import 'class_hierarchy.dart';
 import 'class_members.dart' show MembersCreator;
 import 'constructors.dart';
 import 'members.dart';
 import 'registry.dart';
+import 'resolution_result.dart';
 import 'scope.dart' show MutableScope;
 import 'signatures.dart';
 import 'tree_elements.dart';
 import 'typedefs.dart';
 
 class ResolverTask extends CompilerTask {
   final ConstantCompiler constantCompiler;
   final Compiler compiler;
 
   ResolverTask(Compiler compiler, this.constantCompiler)
@@ skipping 314 matching lines @@
       // happens for enum fields where the type is known but is not in the
       // synthesized AST.
       element.variables.type = const DynamicType();
     }
 
     Expression initializer = element.initializer;
     Modifiers modifiers = element.modifiers;
     if (initializer != null) {
       // TODO(johnniwinther): Avoid analyzing initializers if
       // [Compiler.analyzeSignaturesOnly] is set.
-      visitor.visit(initializer);
+      ResolutionResult result = visitor.visit(initializer);
+      if (result.isConstant) {
+        element.constant = result.constant;
+      }
     } else if (modifiers.isConst) {
       reporter.reportErrorMessage(
           element, MessageKind.CONST_WITHOUT_INITIALIZER);
     } else if (modifiers.isFinal && !element.isInstanceMember) {
       reporter.reportErrorMessage(
           element, MessageKind.FINAL_WITHOUT_INITIALIZER);
     } else {
       // TODO(johnniwinther): Register a feature instead.
       registry.registerTypeUse(new TypeUse.instantiation(coreTypes.nullType));
     }
@@ skipping 722 matching lines @@
   TreeElements get treeElements {
     assert(invariant(this, _treeElements != null,
         message: "TreeElements have not been computed for $this."));
     return _treeElements;
   }
 
   void reuseElement() {
     _treeElements = null;
   }
 }