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_BEGIN_NAMESPACE_STD
26
27template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Comp, class _Proj1, class _Proj2>
28_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
29__includes(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
30           _Comp&& __comp, _Proj1&& __proj1, _Proj2&& __proj2) {
31  for (; __first2 != __last2; ++__first1) {
32    if (__first1 == __last1 || std::__invoke(
33          __comp, std::__invoke(__proj2, *__first2), std::__invoke(__proj1, *__first1)))
34      return false;
35    if (!std::__invoke(__comp, std::__invoke(__proj1, *__first1), std::__invoke(__proj2, *__first2)))
36      ++__first2;
37  }
38  return true;
39}
40
41template <class _InputIterator1, class _InputIterator2, class _Compare>
42_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool includes(
43    _InputIterator1 __first1,
44    _InputIterator1 __last1,
45    _InputIterator2 __first2,
46    _InputIterator2 __last2,
47    _Compare __comp) {
48  static_assert(__is_callable<_Compare, decltype(*__first1), decltype(*__first2)>::value,
49      "Comparator has to be callable");
50
51  return std::__includes(
52      std::move(__first1),
53      std::move(__last1),
54      std::move(__first2),
55      std::move(__last2),
56      static_cast<__comp_ref_type<_Compare> >(__comp),
57      __identity(),
58      __identity());
59}
60
61template <class _InputIterator1, class _InputIterator2>
62_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool
63includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) {
64  return std::includes(
65      std::move(__first1),
66      std::move(__last1),
67      std::move(__first2),
68      std::move(__last2),
69      __less<typename iterator_traits<_InputIterator1>::value_type,
70             typename iterator_traits<_InputIterator2>::value_type>());
71}
72
73_LIBCPP_END_NAMESPACE_STD
74
75#endif // _LIBCPP___ALGORITHM_INCLUDES_H
76