diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/merge.h')
-rw-r--r-- | contrib/llvm-project/libcxx/include/__algorithm/merge.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/merge.h b/contrib/llvm-project/libcxx/include/__algorithm/merge.h new file mode 100644 index 000000000000..ea53ad68f7f7 --- /dev/null +++ b/contrib/llvm-project/libcxx/include/__algorithm/merge.h @@ -0,0 +1,76 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MERGE_H +#define _LIBCPP___ALGORITHM_MERGE_H + +#include <__config> +#include <__algorithm/comp.h> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/copy.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> +_LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +__merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + for (; __first1 != __last1; ++__result) + { + if (__first2 == __last2) + return _VSTD::copy(__first1, __last1, __result); + if (__comp(*__first2, *__first1)) + { + *__result = *__first2; + ++__first2; + } + else + { + *__result = *__first1; + ++__first1; + } + } + return _VSTD::copy(__first2, __last2, __result); +} + +template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); +} + +template <class _InputIterator1, class _InputIterator2, class _OutputIterator> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) +{ + typedef typename iterator_traits<_InputIterator1>::value_type __v1; + typedef typename iterator_traits<_InputIterator2>::value_type __v2; + return _VSTD::merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MERGE_H |