hphp/hack/test/typecheck/instantiate_unresolved1.php

   1 <?hh
   2 /**
   3  * Copyright (c) 2014, Facebook, Inc.
   4  * All rights reserved.
   5  *
   6  * This source code is licensed under the BSD-style license found in the
   7  * LICENSE file in the "hack" directory of this source tree. An additional grant
   8  * of patent rights can be found in the PATENTS file in the same directory.
   9  *
  10  */
  11
  12 function cached_result<T>(T $x): Awaitable<T> {
  13   // UNSAFE
  14 }
  15
  16 function consume<T>(Awaitable<T> $x): void {}
  17
  18 function f(): void {
  19   if (true) {
  20     $x = cached_result('hi');
  21   } else {
  22     $x = cached_result(null);
  23   }
  24
  25   consume($x);
  26 }