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_CONSTEXPR_AFTER_CXX11 _ForwardIterator1 __find_first_of_ce(_ForwardIterator1 __first1, 25 _ForwardIterator1 __last1, 26 _ForwardIterator2 __first2, 27 _ForwardIterator2 __last2, 28 _BinaryPredicate&& __pred) { 29 for (; __first1 != __last1; ++__first1) 30 for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 31 if (__pred(*__first1, *__j)) 32 return __first1; 33 return __last1; 34 } 35 36 template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 37 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 38 find_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 39 _ForwardIterator2 __last2, _BinaryPredicate __pred) { 40 return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred); 41 } 42 43 template <class _ForwardIterator1, class _ForwardIterator2> 44 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 find_first_of( 45 _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2) { 46 typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 47 typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 48 return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 49 } 50 51 _LIBCPP_END_NAMESPACE_STD 52 53 #endif // _LIBCPP___ALGORITHM_FIND_FIRST_OF_H 54