Start resolving classes and default constructors.

frog/leg/typechecker.dart

 // Copyright (c) 2011, 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.
 
 class TypeCheckerTask extends CompilerTask {
   TypeCheckerTask(Compiler compiler) : types = new Types(), super(compiler);
   String get name() => "Type checker";
   Types types;
 
   void check(Node tree, TreeElements elements) {
@@ skipping 322 matching lines @@
   }
 
   Type visitLiteralString(LiteralString node) {
     return types.stringType;
   }
 
   Type visitLiteralNull(LiteralNull node) {
     return types.dynamicType;
   }
 
+  Type visitNewExpression(NewExpression node) {
+    // TODO(karlklose): return the type.
+    return types.dynamicType;
+  }
+
   Type visitLiteralList(LiteralList node) {
     return types.dynamicType;
   }
 
   Type visitNodeList(NodeList node) {
     for (Link<Node> link = node.nodes; !link.isEmpty(); link = link.tail) {
       type(link.head);
     }
     return null;
   }
@@ skipping 75 matching lines @@
 
   Type visitWhile(While node) {
     checkCondition(node.condition);
     type(node.body);
   }
 
   Type visitParenthesizedExpression(ParenthesizedExpression node) {
     return type(node.expression);
   }
 }