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 <__type_traits/invoke.h>
17#include <__type_traits/is_callable.h>
18#include <__utility/move.h>
19
20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21# pragma GCC system_header
22#endif
23
24_LIBCPP_PUSH_MACROS
25#include <__undef_macros>
26
27_LIBCPP_BEGIN_NAMESPACE_STD
28
29template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Comp, class _Proj1, class _Proj2>
30_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __includes(
31 _Iter1 __first1,
32 _Sent1 __last1,
33 _Iter2 __first2,
34 _Sent2 __last2,
35 _Comp&& __comp,
36 _Proj1&& __proj1,
37 _Proj2&& __proj2) {
38 for (; __first2 != __last2; ++__first1) {
39 if (__first1 == __last1 ||
40 std::__invoke(__comp, std::__invoke(__proj2, *__first2), std::__invoke(__proj1, *__first1)))
41 return false;
42 if (!std::__invoke(__comp, std::__invoke(__proj1, *__first1), std::__invoke(__proj2, *__first2)))
43 ++__first2;
44 }
45 return true;
46}
47
48template <class _InputIterator1, class _InputIterator2, class _Compare>
49[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
50includes(_InputIterator1 __first1,
51 _InputIterator1 __last1,
52 _InputIterator2 __first2,
53 _InputIterator2 __last2,
54 _Compare __comp) {
55 static_assert(
56 __is_callable<_Compare&, decltype(*__first1), decltype(*__first2)>::value, "The comparator has to be callable");
57
58 return std::__includes(
59 std::move(__first1),
60 std::move(__last1),
61 std::move(__first2),
62 std::move(__last2),
63 static_cast<__comp_ref_type<_Compare> >(__comp),
64 __identity(),
65 __identity());
66}
67
68template <class _InputIterator1, class _InputIterator2>
69[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
70includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) {
71 return std::includes(std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), __less<>());
72}
73
74_LIBCPP_END_NAMESPACE_STD
75
76_LIBCPP_POP_MACROS
77
78#endif // _LIBCPP___ALGORITHM_INCLUDES_H
79