e78f53d1e8
This reverts commit 68c04b0ae62d8431d72d8b47fc13008002ee4387. This disables the IWYU mapping that caused the failure, since the headers aren't reachable for now. This is the first part of the "Freezing C++03 headers" proposal explained in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58. This patch mechanically copies the headers as of the LLVM 19.1 release into a subdirectory of libc++ so that we can start using these headers when building in C++03 mode. We are going to be backporting important changes to that copy of the headers until the LLVM 21 release. After the LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy of the headers. This patch only performs a copy of the headers -- these headers are still unused by the rest of the codebase.
139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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_RANGES_MERGE_H
|
|
#define _LIBCPP___ALGORITHM_RANGES_MERGE_H
|
|
|
|
#include <__algorithm/in_in_out_result.h>
|
|
#include <__algorithm/ranges_copy.h>
|
|
#include <__config>
|
|
#include <__functional/identity.h>
|
|
#include <__functional/invoke.h>
|
|
#include <__functional/ranges_operations.h>
|
|
#include <__iterator/concepts.h>
|
|
#include <__iterator/mergeable.h>
|
|
#include <__ranges/access.h>
|
|
#include <__ranges/concepts.h>
|
|
#include <__ranges/dangling.h>
|
|
#include <__type_traits/remove_cvref.h>
|
|
#include <__utility/move.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
#include <__undef_macros>
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
namespace ranges {
|
|
|
|
template <class _InIter1, class _InIter2, class _OutIter>
|
|
using merge_result = in_in_out_result<_InIter1, _InIter2, _OutIter>;
|
|
|
|
namespace __merge {
|
|
|
|
template < class _InIter1,
|
|
class _Sent1,
|
|
class _InIter2,
|
|
class _Sent2,
|
|
class _OutIter,
|
|
class _Comp,
|
|
class _Proj1,
|
|
class _Proj2>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr merge_result<__remove_cvref_t<_InIter1>,
|
|
__remove_cvref_t<_InIter2>,
|
|
__remove_cvref_t<_OutIter>>
|
|
__merge_impl(_InIter1&& __first1,
|
|
_Sent1&& __last1,
|
|
_InIter2&& __first2,
|
|
_Sent2&& __last2,
|
|
_OutIter&& __result,
|
|
_Comp&& __comp,
|
|
_Proj1&& __proj1,
|
|
_Proj2&& __proj2) {
|
|
for (; __first1 != __last1 && __first2 != __last2; ++__result) {
|
|
if (std::invoke(__comp, std::invoke(__proj2, *__first2), std::invoke(__proj1, *__first1))) {
|
|
*__result = *__first2;
|
|
++__first2;
|
|
} else {
|
|
*__result = *__first1;
|
|
++__first1;
|
|
}
|
|
}
|
|
auto __ret1 = ranges::copy(std::move(__first1), std::move(__last1), std::move(__result));
|
|
auto __ret2 = ranges::copy(std::move(__first2), std::move(__last2), std::move(__ret1.out));
|
|
return {std::move(__ret1.in), std::move(__ret2.in), std::move(__ret2.out)};
|
|
}
|
|
|
|
struct __fn {
|
|
template <input_iterator _InIter1,
|
|
sentinel_for<_InIter1> _Sent1,
|
|
input_iterator _InIter2,
|
|
sentinel_for<_InIter2> _Sent2,
|
|
weakly_incrementable _OutIter,
|
|
class _Comp = less,
|
|
class _Proj1 = identity,
|
|
class _Proj2 = identity>
|
|
requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr merge_result<_InIter1, _InIter2, _OutIter> operator()(
|
|
_InIter1 __first1,
|
|
_Sent1 __last1,
|
|
_InIter2 __first2,
|
|
_Sent2 __last2,
|
|
_OutIter __result,
|
|
_Comp __comp = {},
|
|
_Proj1 __proj1 = {},
|
|
_Proj2 __proj2 = {}) const {
|
|
return __merge::__merge_impl(__first1, __last1, __first2, __last2, __result, __comp, __proj1, __proj2);
|
|
}
|
|
|
|
template <input_range _Range1,
|
|
input_range _Range2,
|
|
weakly_incrementable _OutIter,
|
|
class _Comp = less,
|
|
class _Proj1 = identity,
|
|
class _Proj2 = identity>
|
|
requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr merge_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>, _OutIter>
|
|
operator()(_Range1&& __range1,
|
|
_Range2&& __range2,
|
|
_OutIter __result,
|
|
_Comp __comp = {},
|
|
_Proj1 __proj1 = {},
|
|
_Proj2 __proj2 = {}) const {
|
|
return __merge::__merge_impl(
|
|
ranges::begin(__range1),
|
|
ranges::end(__range1),
|
|
ranges::begin(__range2),
|
|
ranges::end(__range2),
|
|
__result,
|
|
__comp,
|
|
__proj1,
|
|
__proj2);
|
|
}
|
|
};
|
|
|
|
} // namespace __merge
|
|
|
|
inline namespace __cpo {
|
|
inline constexpr auto merge = __merge::__fn{};
|
|
} // namespace __cpo
|
|
} // namespace ranges
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___ALGORITHM_RANGES_MERGE_H
|