hphp/hack/test/typecheck/generic_fun.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 function id<T>(T $x): T { return $x; }
  13
  14 function test(): (function(int): int) {
  15   return fun('id');
  16 }