sort classes in dependency order, or load lazily if needed, fixes #78

lib/runtime/dart_core.js

 // Copyright (c) 2015, 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.
 
-var dart_core;
-(function (dart_core) {
-  var Object = (function () {
-    var constructor = function Object() {};
+var core;
+(function (core) {
+  'use strict';
 
-    constructor.prototype.toString = function toString() {
-      return 'Instance of ' + this.constructor.name;
-    };
+  // TODO(jmesserly): for now this is copy+paste from dart/core.js
+  class Object {
+    constructor() {
+      var name = this.constructor.name;
+      var init = this[name];
+      var result = void 0;
+      if (init)
+        result = init.apply(this, arguments);
+      return result === void 0 ? this : result;
+    }
+    ['=='](other) {
+      return identical(this, other);
+    }
+    get hashCode() {
+      return _js_helper.Primitives.objectHashCode(this);
+    }
+    toString() {
+      return _js_helper.Primitives.objectToString(this);
+    }
+    noSuchMethod(invocation) {
+      throw new NoSuchMethodError(this, invocation.memberName, invocation.positionalArguments, invocation.namedArguments);
+    }
+    get runtimeType() {
+      return _js_helper.getRuntimeType(this);
+    }
+  }
+  core.Object = Object;
 
-    constructor.prototype.noSuchMethod = function noSuchMethod(invocation) {
-      // TODO: add arguments when Invocation is defined
-      throw new NoSuchMethodError();
-    };
-
-    // TODO: implement ==
-
-    // TODO: implement hashCode
-
-    // TODO: implement runtimeType
-
-    return constructor;
-  })();
-  dart_core.Object = Object;
+  // Function identical: (Object, Object) → bool
+  function identical(a, b) {
+    return _js_helper.Primitives.identicalImplementation(a, b);
+  }
+  core.identical = identical;
 
   // Function print: (Object) → void
   function print(obj) {
     console.log(obj.toString());
   }
-  dart_core.print = print;
+  core.print = print;
 
   // Class NoSuchMethodError
   var NoSuchMethodError = (function () {
     // TODO(vsm): Implement.
     function NoSuchMethodError(f, args) {
     }
     return NoSuchMethodError;
   })();
-  dart_core.NoSuchMethodError = NoSuchMethodError;
+  core.NoSuchMethodError = NoSuchMethodError;
 
   // Class UnimplementedError
   var UnimplementedError = (function () {
     // TODO(vsm): Implement.
     function UnimplementedError(message) {
       this.message = (message != void 0) ? message : null;
     }
     return UnimplementedError;
   })();
-  dart_core.UnimplementedError = UnimplementedError;
-})(dart_core || (dart_core = {}));
+  core.UnimplementedError = UnimplementedError;
+})(core || (core = {}));