hphp/hack/test/typecheck/typing_ok_test_cond.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 A {}
  13
  14 function foo(A $x): void {}
  15
  16 function test1(?A $x): void {
  17   while ($x) {
  18     assert($x is A);
  19     foo($x);
  20   }
  21 }
  22
  23 function test2(?A $x): void {
  24   while (!$x) {
  25   }
  26   foo($x);
  27 }
  28
  29 function test3(?A $x): void {
  30   for (; $x; ) {
  31     assert($x is A);
  32     foo($x);
  33   }
  34 }
  35
  36 function test4(?A $x): void {
  37   for (; !$x; ) {
  38   }
  39   foo($x);
  40 }
  41
  42 function test5(?A $x): void {
  43   if ($x) {
  44     foo($x);
  45   }
  46 }
  47
  48 function test6(?A $x): void {
  49   if (!$x) {
  50   } else {
  51     foo($x);
  52   }
  53 }