mfbt/Algorithm.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* A polyfill for `<algorithm>`. */
   8
   9 #ifndef mozilla_Algorithm_h
  10 #define mozilla_Algorithm_h
  11
  12 namespace mozilla {
  13
  14 // Returns true if all elements in the range [aFirst, aLast)
  15 // satisfy the predicate aPred.
  16 template <class Iter, class Pred>
  17 constexpr bool AllOf(Iter aFirst, Iter aLast, Pred aPred)
  18 {
  19   for (; aFirst != aLast; ++aFirst) {
  20     if (!aPred(*aFirst)) {
  21       return false;
  22     }
  23   }
  24   return true;
  25 }
  26
  27 } // namespace mozilla
  28
  29 #endif // mozilla_Algorithm_h