sync the repo

[hiphop-php.git] / hphp / hack / test / typecheck / immmap_mutate.php

<?hh
/**
 * Copyright (c) 2014, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the "hack" directory of this source tree.
 *
 *
 */

function mutate(ImmMap<int, int> $m): void {
  $m[1] = 2;
}