eval(readFile("Worlds_Library"))

$world.call(null,
  (function() {
    var $staticScope = $scope;
    return function($world, $this) {
      var $scope = $staticScope.makeChild();
      $scope.decl($world, "x", arguments[2]);
alert("a x="+$scope.get($world, "x"))
alert("b x="+$scope.makeChild().get($world, "x"))
alert("c x="+$scope.get($world.makeChild(), "x"))
alert("d x="+$scope.makeChild().get($world.makeChild(), "x"))
      $world.tryElse(
        function($world){
alert("e x="+$scope.get($world, "x"))
          $world.call(null, $scope.get($world, "alert"),("in try, " + $scope.get($world, "x")));
          throw "abort"
        }, function($world) {
          $world.call(null, $scope.get($world, "alert"),("in else, " + $scope.get($world, "x")))
        }
      )
    }
  })(),
  5)