first stage of Value cleanups

frog/var_member.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.
 
 /** A dynamic member stub. */
 class VarMember {
   final String name;
 
   VarMember(this.name);
 
   abstract void generate(CodeWriter code);
 
   Type get returnType() => world.varType;
 
   Value invoke(MethodGenerator context, Node node, Value target, Arguments args) {
     return new Value(returnType,
-      '${target.code}.$name(${args.getCode()})');
+      '${target.code}.$name(${args.getCode()})', node.span);
   }
 }
 
 /**
  * This function generates a dynamic call stub for functions. It's part of a
  * series of steps described below. Most of the code is generated by
  * gen.dart, with some helpers in core.js
  *
  * Given a call site in Dart like:
  *   f(1, 2, capture:true);
@@ skipping 161 matching lines @@
   }
 
   /** Invokes members to ensure they're generated. */
   _invokeMembers(MethodGenerator context, Node node) {
     if (_fallbackStubs != null) return;
 
     _fallbackStubs = [];
     for (var member in members) {
       // Invoke the member with the stub args (this gives us the method body),
       // then create the stub method.
-      final target = new Value(member.declaringType, 'this');
+      final target = new Value(member.declaringType, 'this', node.span);
       var result = member.invoke(context, node, target, args);
       var stub = new VarMethodStub(name, member, args, result);
 
       // Put the stub on the type directly if possible. Otherwise
       // put the stub on Object.prototype.
       var type = member.declaringType;
       if (type.library != world.dom && !type.isObject) {
         _addVarStub(type, stub);
       } else {
         _fallbackStubs.add(stub);
       }
     }
 
     // Finally, invoke noSuchMethod
-    final target = new Value(world.objectType, 'this');
+    final target = new Value(world.objectType, 'this', node.span);
     var result = target.invokeNoSuchMethod(context, baseName, node, args);
     var stub = new VarMethodStub(name, null, args, result);
     if (_fallbackStubs.length == 0) {
       _addVarStub(world.objectType, stub);
     } else {
       _fallbackStubs.add(stub);
       world.gen.corejs.useVarMethod = true;
     }
   }
 
@@ skipping 31 matching lines @@
   }
 }
 
 String _getCallStubName(String name, Arguments args) {
   final nameBuilder = new StringBuffer('${name}\$${args.bareCount}');
   for (int i = args.bareCount; i < args.length; i++) {
     nameBuilder.add('\$').add(args.getName(i));
   }
   return nameBuilder.toString();
 }