Lazy implementation of final variables.

lib/compiler/implementation/tree/nodes.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.
 
 interface Visitor<R> {
   R visitBlock(Block node);
   R visitBreakStatement(BreakStatement node);
   R visitCascade(Cascade node);
   R visitCascadeReceiver(CascadeReceiver node);
   R visitCaseMatch(CaseMatch node);
@@ skipping 1118 matching lines @@
   accept(Visitor visitor) => visitor.visitModifiers(this);
   visitChildren(Visitor visitor) => nodes.accept(visitor);
 
   bool isStatic() => (flags & FLAG_STATIC) != 0;
   bool isAbstract() => (flags & FLAG_ABSTRACT) != 0;
   bool isFinal() => (flags & FLAG_FINAL) != 0;
   bool isVar() => (flags & FLAG_VAR) != 0;
   bool isConst() => (flags & FLAG_CONST) != 0;
   bool isFactory() => (flags & FLAG_FACTORY) != 0;
   bool isExternal() => (flags & FLAG_EXTERNAL) != 0;
+  bool isFinalOrConst() => (flags & (FLAG_FINAL | FLAG_CONST)) != 0;
 
   String toString() {
     LinkBuilder<String> builder = new LinkBuilder<String>();
     if (isStatic()) builder.addLast('static');
     if (isAbstract()) builder.addLast('abstract');
     if (isFinal()) builder.addLast('final');
     if (isVar()) builder.addLast('var');
     if (isConst()) builder.addLast('const');
     if (isFactory()) builder.addLast('factory');
     if (isExternal()) builder.addLast('external');
@@ skipping 522 matching lines @@
 }
 
 class CatchBlock extends Node {
   final TypeAnnotation type;
   final NodeList formals;
   final Block block;
 
   final Token onKeyword;
   final Token catchKeyword;
 
-  CatchBlock(this.type, this.formals, this.block, 
+  CatchBlock(this.type, this.formals, this.block,
              this.onKeyword, this.catchKeyword);
 
   CatchBlock asCatchBlock() => this;
 
   accept(Visitor visitor) => visitor.visitCatchBlock(this);
 
   Node get exception() {
     if (formals.nodes.isEmpty()) return null;
     VariableDefinitions declarations = formals.nodes.head;
     return declarations.definitions.nodes.head;
@@ skipping 61 matching lines @@
  * argument).
  *
  * TODO(ahe): This method is controversial, the team needs to discuss
  * if top-level methods are acceptable and what naming conventions to
  * use.
  */
 initializerDo(Node node, f(Node node)) {
   SendSet send = node.asSendSet();
   if (send !== null) return f(send.arguments.head);
 }