hphp/hack/test/typecheck/this_anon_bad.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 <<__ConsistentConstruct>>
  13 class Foo {
  14   public function getAnon1(): (function(this): int) {
  15     return function(this $x): int {
  16       return 4;
  17     };
  18   }
  19
  20   public function test(): void {
  21     $func = $this->getAnon1();
  22
  23     // Can pass in $this
  24     $func($this);
  25
  26     // Can pass an alias of $this
  27     $this_alias = $this;
  28     $func($this_alias);
  29
  30     // Can pass new static()
  31     $func(new static());
  32
  33     // But not new Foo()
  34     $func(new Foo());
  35   }
  36 }