Better runtime type checks.

frog/world.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.
 
 /** The one true [World]. */
 World world;
 
 /**
  * Should be called exactly once to setup singleton world.
  * Can use world.reset() to reinitialize.
@@ skipping 74 matching lines @@
 
   // Special types to Dart.
   Type varType;
   // TODO(jimhug): Is this ever not === varType?
   Type dynamicType;
 
   Type voidType;
 
   Type objectType;
   Type numType;
+  Type intType;

[jimhug, 2011/11/07 16:41:26]

Darn.  I was hoping we could pretend these just didn't exist <smile?>

+  Type doubleType;
   Type boolType;
   Type stringType;
   Type listType;
   Type mapType;
   Type functionType;
 
   World(this.files)
     : libraries = {}, _todo = [], _members = {}, _topNames = {},
       // TODO(jmesserly): these two types don't actually back our Date and
       // RegExp yet, so we need to add them manually.
@@ skipping 13 matching lines @@
     corelib = new Library(readFile('dart:core'));
     libraries['dart:core'] = corelib;
     _todo.add(corelib);
 
     voidType = _addToCoreLib('void', false);
     dynamicType = _addToCoreLib('Dynamic', false);
     varType = dynamicType;
 
     objectType = _addToCoreLib('Object', true);
     numType = _addToCoreLib('num', false);
+    intType = _addToCoreLib('int', false);
+    doubleType = _addToCoreLib('double', false);
     boolType = _addToCoreLib('bool', false);
     stringType = _addToCoreLib('String', false);
     listType = _addToCoreLib('List', false);
     mapType = _addToCoreLib('Map', false);
     functionType = _addToCoreLib('Function', false);
   }
 
   _addMember(Member member) {
     // Private members are only visible in their own library.
     assert(!member.isPrivate);
@@ skipping 287 matching lines @@
 
   withTiming(String name, f()) {
     final sw = new StopWatch();
     sw.start();
     var result = f();
     sw.stop();
     info('$name in ${sw.elapsedInMs()}msec');
     return result;
   }
 }