Add ConstantConstructor to ConstantExpression system.

pkg/compiler/lib/src/resolution/members.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 resolution;
 
 abstract class TreeElements {
   AnalyzableElement get analyzedElement;
   Iterable<Node> get superUses;
 
@@ skipping 696 matching lines @@
       compiler.reportError(element, MessageKind.CONST_WITHOUT_INITIALIZER);
     } else if (modifiers.isFinal && !element.isInstanceMember) {
       compiler.reportError(element, MessageKind.FINAL_WITHOUT_INITIALIZER);
     } else {
       registry.registerInstantiatedClass(compiler.nullClass);
     }
 
     if (Elements.isStaticOrTopLevelField(element)) {
       visitor.addDeferredAction(element, () {
         if (element.modifiers.isConst) {
-          constantCompiler.compileConstant(element);
+          element.constant = constantCompiler.compileConstant(element);
         } else {
           constantCompiler.compileVariable(element);
         }
       });
       if (initializer != null) {
         if (!element.modifiers.isConst) {
           // TODO(johnniwinther): Determine the const-ness eagerly to avoid
           // unnecessary registrations.
           registry.registerLazyField();
         }
@@ skipping 1692 matching lines @@
       if (element.isInitializingFormal) {
         registry.useElement(parameterNode, element);
       } else {
         LocalParameterElement parameterElement = element;
         defineLocalVariable(parameterNode, parameterElement);
         addToScope(parameterElement);
       }
       parameterNodes = parameterNodes.tail;
     });
     addDeferredAction(enclosingElement, () {
-      functionParameters.forEachOptionalParameter((Element parameter) {
-        compiler.resolver.constantCompiler.compileConstant(parameter);
+      functionParameters.forEachOptionalParameter(
+          (ParameterElementX parameter) {
+        parameter.constant =
+            compiler.resolver.constantCompiler.compileConstant(parameter);
       });
     });
     if (inCheckContext) {
       functionParameters.forEachParameter((ParameterElement element) {
         registry.registerIsCheck(element.type);
       });
     }
   }
 
   visitCascade(Cascade node) {
@@ skipping 2420 matching lines @@
     if (definitions.modifiers.isFinal &&
         !resolver.allowFinalWithoutInitializer) {
       compiler.reportError(node, MessageKind.FINAL_WITHOUT_INITIALIZER);
     }
     return node;
   }
 
   visitNodeList(NodeList node) {
     for (Link<Node> link = node.nodes; !link.isEmpty; link = link.tail) {
       Identifier name = visit(link.head);
-      LocalVariableElement element = new LocalVariableElementX(
+      LocalVariableElementX element = new LocalVariableElementX(
           name.source, resolver.enclosingElement,
           variables, name.token);
       resolver.defineLocalVariable(link.head, element);
       resolver.addToScope(element);
       if (definitions.modifiers.isConst) {
         compiler.enqueuer.resolution.addDeferredAction(element, () {
-          compiler.resolver.constantCompiler.compileConstant(element);
+          element.constant =
+              compiler.resolver.constantCompiler.compileConstant(element);
         });
       }
     }
   }
 }
 
 class ConstructorResolver extends CommonResolverVisitor<Element> {
   final ResolverVisitor resolver;
   bool inConstContext;
   DartType type;
@@ skipping 258 matching lines @@
 }
 
 /// The result for the resolution of the `assert` method.
 class AssertResult implements ResolutionResult {
   const AssertResult();
 
   Element get element => null;
 
   String toString() => 'AssertResult()';
 }