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>
__includes(_Iter1 __first1,_Sent1 __last1,_Iter2 __first2,_Sent2 __last2,_Comp && __comp,_Proj1 && __proj1,_Proj2 && __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 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
includes(_InputIterator1 __first1,_InputIterator1 __last1,_InputIterator2 __first2,_InputIterator2 __last2,_Compare __comp)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 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
includes(_InputIterator1 __first1,_InputIterator1 __last1,_InputIterator2 __first2,_InputIterator2 __last2)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