Mercurial > hg > CbC > CbC_llvm
view libcxx/include/__algorithm/set_union.h @ 236:c4bab56944e8 llvm-original
LLVM 16
author | kono |
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date | Wed, 09 Nov 2022 17:45:10 +0900 |
parents | 5f17cb93ff66 |
children | 1f2b6ac9f198 |
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//===----------------------------------------------------------------------===// // // 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_SET_UNION_H #define _LIBCPP___ALGORITHM_SET_UNION_H #include <__algorithm/comp.h> #include <__algorithm/comp_ref_type.h> #include <__algorithm/copy.h> #include <__config> #include <__iterator/iterator_traits.h> #include <__utility/move.h> #include <__utility/pair.h> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif _LIBCPP_BEGIN_NAMESPACE_STD template <class _InIter1, class _InIter2, class _OutIter> struct __set_union_result { _InIter1 __in1_; _InIter2 __in2_; _OutIter __out_; // need a constructor as C++03 aggregate init is hard _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __set_union_result(_InIter1&& __in_iter1, _InIter2&& __in_iter2, _OutIter&& __out_iter) : __in1_(std::move(__in_iter1)), __in2_(std::move(__in_iter2)), __out_(std::move(__out_iter)) {} }; template <class _Compare, class _InIter1, class _Sent1, class _InIter2, class _Sent2, class _OutIter> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __set_union_result<_InIter1, _InIter2, _OutIter> __set_union( _InIter1 __first1, _Sent1 __last1, _InIter2 __first2, _Sent2 __last2, _OutIter __result, _Compare&& __comp) { for (; __first1 != __last1; ++__result) { if (__first2 == __last2) { auto __ret1 = std::__copy_impl(std::move(__first1), std::move(__last1), std::move(__result)); return __set_union_result<_InIter1, _InIter2, _OutIter>( std::move(__ret1.first), std::move(__first2), std::move((__ret1.second))); } if (__comp(*__first2, *__first1)) { *__result = *__first2; ++__first2; } else { if (!__comp(*__first1, *__first2)) { ++__first2; } *__result = *__first1; ++__first1; } } auto __ret2 = std::__copy_impl(std::move(__first2), std::move(__last2), std::move(__result)); return __set_union_result<_InIter1, _InIter2, _OutIter>( std::move(__first1), std::move(__ret2.first), std::move((__ret2.second))); } template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator set_union( _InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) { return std::__set_union<__comp_ref_type<_Compare> >( std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), std::move(__result), __comp) .__out_; } template <class _InputIterator1, class _InputIterator2, class _OutputIterator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator set_union( _InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) { return std::set_union( std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), std::move(__result), __less<typename iterator_traits<_InputIterator1>::value_type, typename iterator_traits<_InputIterator2>::value_type>()); } _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___ALGORITHM_SET_UNION_H