hphp/hsl/src/keyset/introspect.php

   1 <?hh
   2 /*
   3  *  Copyright (c) 2004-present, 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 root directory of this source tree.
   8  *
   9  */
  10
  11 namespace HH\Lib\Keyset;
  12
  13 use namespace HH\Lib\C;
  14
  15 /**
  16  * Returns whether the two given keysets have the same elements, using strict
  17  * equality. To guarantee equality of order as well as contents, use `===`.
  18  *
  19  * Time complexity: O(n)
  20  * Space complexity: O(1)
  21  */
  22 function equal<Tv as arraykey>(
  23   keyset<Tv> $keyset1,
  24   keyset<Tv> $keyset2,
  25 )[]: bool {
  26   return $keyset1 == $keyset2;
  27 }