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 
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 #  pragma GCC system_header
19 #  pragma clang include_instead(<algorithm>)
20 #endif
21 
22 _LIBCPP_BEGIN_NAMESPACE_STD
23 
24 template <class _Compare, class _InputIterator1, class _InputIterator2>
25 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
26 __includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2,
27            _Compare __comp)
28 {
29     for (; __first2 != __last2; ++__first1)
30     {
31         if (__first1 == __last1 || __comp(*__first2, *__first1))
32             return false;
33         if (!__comp(*__first1, *__first2))
34             ++__first2;
35     }
36     return true;
37 }
38 
39 template <class _InputIterator1, class _InputIterator2, class _Compare>
40 _LIBCPP_NODISCARD_EXT inline
41 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
42 bool
43 includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2,
44          _Compare __comp)
45 {
46     typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
47     return _VSTD::__includes<_Comp_ref>(__first1, __last1, __first2, __last2, __comp);
48 }
49 
50 template <class _InputIterator1, class _InputIterator2>
51 _LIBCPP_NODISCARD_EXT inline
52 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
53 bool
54 includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2)
55 {
56     return _VSTD::includes(__first1, __last1, __first2, __last2,
57                           __less<typename iterator_traits<_InputIterator1>::value_type,
58                                  typename iterator_traits<_InputIterator2>::value_type>());
59 }
60 
61 _LIBCPP_END_NAMESPACE_STD
62 
63 #endif // _LIBCPP___ALGORITHM_INCLUDES_H
64