hphp/hack/test/typecheck/this_privacypolicybase2.php

   1 <?hh // strict
   2 /**
   3  * Copyright (c) 2014, Facebook, Inc.
   4  * All rights reserved.
   5  *
   6  * This source code is licensed under the MIT license found in the
   7  * LICENSE file in the "hack" directory of this source tree.
   8  *
   9  *
  10  */
  11
  12 abstract class Entish {
  13   abstract protected static function getPrivacyPolicy(): PrivacyPolicyBase<this>;
  14 }
  15
  16 abstract class PrivacyPolicyBase<T> {}
  17
  18 class MyEnt extends Entish {
  19   protected static function getPrivacyPolicy(): PrivacyPolicyBase<this> {
  20     return new MyEntPrivacyPolicy();
  21   }
  22 }
  23
  24 class MyEntPrivacyPolicy<T as MyEnt> extends PrivacyPolicyBase<T> {}