hphp/hack/test/typecheck/await_twice.php

   1 <?hh // strict
   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 async function tweedledum(): Awaitable<string> {
  13   return "alice";
  14 }
  15
  16 async function tweedledee(): Awaitable<Awaitable<string>> {
  17   return tweedledum();
  18 }
  19
  20 async function whats_in_the_rabbit_hole(): Awaitable<void> {
  21   $a = await tweedledee();
  22   $b = await $a;
  23   print($b);
  24 }