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 <__iterator/iterator_traits.h>
16 #include <__utility/move.h>
17 
18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19 #  pragma GCC system_header
20 #endif
21 
22 _LIBCPP_BEGIN_NAMESPACE_STD
23 
24 template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Comp>
25 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
26 __includes(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2, _Comp&& __comp) {
27   for (; __first2 != __last2; ++__first1) {
28     if (__first1 == __last1 || __comp(*__first2, *__first1))
29       return false;
30     if (!__comp(*__first1, *__first2))
31       ++__first2;
32   }
33   return true;
34 }
35 
36 template <class _InputIterator1, class _InputIterator2, class _Compare>
37 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 bool includes(
38     _InputIterator1 __first1,
39     _InputIterator1 __last1,
40     _InputIterator2 __first2,
41     _InputIterator2 __last2,
42     _Compare __comp) {
43   typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
44   return std::__includes(
45       std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), static_cast<_Comp_ref>(__comp));
46 }
47 
48 template <class _InputIterator1, class _InputIterator2>
49 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
50 includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) {
51   return std::includes(
52       std::move(__first1),
53       std::move(__last1),
54       std::move(__first2),
55       std::move(__last2),
56       __less<typename iterator_traits<_InputIterator1>::value_type,
57              typename iterator_traits<_InputIterator2>::value_type>());
58 }
59 
60 _LIBCPP_END_NAMESPACE_STD
61 
62 #endif // _LIBCPP___ALGORITHM_INCLUDES_H
63