|
221
|
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_MERGE_H
|
|
|
10 #define _LIBCPP___ALGORITHM_MERGE_H
|
|
|
11
|
|
|
12 #include <__config>
|
|
|
13 #include <__algorithm/copy.h>
|
|
|
14 #include <__algorithm/comp_ref_type.h>
|
|
|
15 #include <__iterator/iterator_traits.h>
|
|
|
16
|
|
|
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
|
18 #pragma GCC system_header
|
|
|
19 #endif
|
|
|
20
|
|
|
21 _LIBCPP_PUSH_MACROS
|
|
|
22 #include <__undef_macros>
|
|
|
23
|
|
|
24 _LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
25
|
|
|
26 template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator>
|
|
|
27 _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
|
28 _OutputIterator
|
|
|
29 __merge(_InputIterator1 __first1, _InputIterator1 __last1,
|
|
|
30 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
|
|
|
31 {
|
|
|
32 for (; __first1 != __last1; ++__result)
|
|
|
33 {
|
|
|
34 if (__first2 == __last2)
|
|
|
35 return _VSTD::copy(__first1, __last1, __result);
|
|
|
36 if (__comp(*__first2, *__first1))
|
|
|
37 {
|
|
|
38 *__result = *__first2;
|
|
|
39 ++__first2;
|
|
|
40 }
|
|
|
41 else
|
|
|
42 {
|
|
|
43 *__result = *__first1;
|
|
|
44 ++__first1;
|
|
|
45 }
|
|
|
46 }
|
|
|
47 return _VSTD::copy(__first2, __last2, __result);
|
|
|
48 }
|
|
|
49
|
|
|
50 template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare>
|
|
|
51 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
|
52 _OutputIterator
|
|
|
53 merge(_InputIterator1 __first1, _InputIterator1 __last1,
|
|
|
54 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
|
|
|
55 {
|
|
|
56 typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
|
|
|
57 return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp);
|
|
|
58 }
|
|
|
59
|
|
|
60 template <class _InputIterator1, class _InputIterator2, class _OutputIterator>
|
|
|
61 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
|
62 _OutputIterator
|
|
|
63 merge(_InputIterator1 __first1, _InputIterator1 __last1,
|
|
|
64 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
|
|
|
65 {
|
|
|
66 typedef typename iterator_traits<_InputIterator1>::value_type __v1;
|
|
|
67 typedef typename iterator_traits<_InputIterator2>::value_type __v2;
|
|
|
68 return _VSTD::merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>());
|
|
|
69 }
|
|
|
70
|
|
|
71 _LIBCPP_END_NAMESPACE_STD
|
|
|
72
|
|
|
73 _LIBCPP_POP_MACROS
|
|
|
74
|
|
|
75 #endif // _LIBCPP___ALGORITHM_MERGE_H
|
