hphp/hack/test/typecheck/this_inherit.php

   1 <?hh
   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 class Base {
  13   public function foo(): this {
  14     return $this;
  15   }
  16 }
  17
  18 class Child extends Base {
  19   public function foo(): this {
  20     return $this;
  21   }
  22 }