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
30template <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
49template <class _InputIterator1, class _InputIterator2, class _Compare>
50_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
51includes(_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
69template <class _InputIterator1, class _InputIterator2>
70_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
71includes(_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