1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_INCLUDES_H 10 #define _LIBCPP___ALGORITHM_INCLUDES_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__config> 15 #include <__functional/identity.h> 16 #include <__functional/invoke.h> 17 #include <__iterator/iterator_traits.h> 18 #include <__type_traits/is_callable.h> 19 #include <__utility/move.h> 20 21 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 22 # pragma GCC system_header 23 #endif 24 25 _LIBCPP_PUSH_MACROS 26 #include <__undef_macros> 27 28 _LIBCPP_BEGIN_NAMESPACE_STD 29 30 template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Comp, class _Proj1, class _Proj2> 31 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __includes( 32 _Iter1 __first1, 33 _Sent1 __last1, 34 _Iter2 __first2, 35 _Sent2 __last2, 36 _Comp&& __comp, 37 _Proj1&& __proj1, 38 _Proj2&& __proj2) { 39 for (; __first2 != __last2; ++__first1) { 40 if (__first1 == __last1 || 41 std::__invoke(__comp, std::__invoke(__proj2, *__first2), std::__invoke(__proj1, *__first1))) 42 return false; 43 if (!std::__invoke(__comp, std::__invoke(__proj1, *__first1), std::__invoke(__proj2, *__first2))) 44 ++__first2; 45 } 46 return true; 47 } 48 49 template <class _InputIterator1, class _InputIterator2, class _Compare> 50 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 51 includes(_InputIterator1 __first1, 52 _InputIterator1 __last1, 53 _InputIterator2 __first2, 54 _InputIterator2 __last2, 55 _Compare __comp) { 56 static_assert( 57 __is_callable<_Compare, decltype(*__first1), decltype(*__first2)>::value, "Comparator has to be callable"); 58 59 return std::__includes( 60 std::move(__first1), 61 std::move(__last1), 62 std::move(__first2), 63 std::move(__last2), 64 static_cast<__comp_ref_type<_Compare> >(__comp), 65 __identity(), 66 __identity()); 67 } 68 69 template <class _InputIterator1, class _InputIterator2> 70 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 71 includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { 72 return std::includes(std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), __less<>()); 73 } 74 75 _LIBCPP_END_NAMESPACE_STD 76 77 _LIBCPP_POP_MACROS 78 79 #endif // _LIBCPP___ALGORITHM_INCLUDES_H 80