hphp/hack/test/typecheck/arraykey_type_hint_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 class C {}
  13
  14 function f(arraykey $k1, arraykey $k2): arraykey {
  15   return $k2;
  16 }
  17
  18 function test(): void {
  19   $c = new C();
  20   f($c, 2);
  21 }