libcxx/include/__algorithm/find_first_of.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP___ALGORITHM_FIND_FIRST_OF_H
  11 #define _LIBCPP___ALGORITHM_FIND_FIRST_OF_H
  12
  13 #include <__algorithm/comp.h>
  14 #include <__config>
  15 #include <__iterator/iterator_traits.h>
  16
  17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  18 #  pragma GCC system_header
  19 #endif
  20
  21 _LIBCPP_BEGIN_NAMESPACE_STD
  22
  23 template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate>
  24 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator1 __find_first_of_ce(
  25     _ForwardIterator1 __first1,
  26     _ForwardIterator1 __last1,
  27     _ForwardIterator2 __first2,
  28     _ForwardIterator2 __last2,
  29     _BinaryPredicate&& __pred) {
  30   for (; __first1 != __last1; ++__first1)
  31     for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j)
  32       if (__pred(*__first1, *__j))
  33         return __first1;
  34   return __last1;
  35 }
  36
  37 template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate>
  38 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator1 find_first_of(
  39     _ForwardIterator1 __first1,
  40     _ForwardIterator1 __last1,
  41     _ForwardIterator2 __first2,
  42     _ForwardIterator2 __last2,
  43     _BinaryPredicate __pred) {
  44   return std::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred);
  45 }
  46
  47 template <class _ForwardIterator1, class _ForwardIterator2>
  48 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator1 find_first_of(
  49     _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2) {
  50   return std::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to());
  51 }
  52
  53 _LIBCPP_END_NAMESPACE_STD
  54
  55 #endif // _LIBCPP___ALGORITHM_FIND_FIRST_OF_H