__cxx03/__memory/ranges_uninitialized_algorithms.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___CXX03___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H
0011 #define _LIBCPP___CXX03___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H
0012
0013 #include <__cxx03/__algorithm/in_out_result.h>
0014 #include <__cxx03/__concepts/constructible.h>
0015 #include <__cxx03/__config>
0016 #include <__cxx03/__iterator/concepts.h>
0017 #include <__cxx03/__iterator/incrementable_traits.h>
0018 #include <__cxx03/__iterator/iter_move.h>
0019 #include <__cxx03/__iterator/iterator_traits.h>
0020 #include <__cxx03/__iterator/readable_traits.h>
0021 #include <__cxx03/__memory/concepts.h>
0022 #include <__cxx03/__memory/uninitialized_algorithms.h>
0023 #include <__cxx03/__ranges/access.h>
0024 #include <__cxx03/__ranges/concepts.h>
0025 #include <__cxx03/__ranges/dangling.h>
0026 #include <__cxx03/__type_traits/remove_reference.h>
0027 #include <__cxx03/__utility/move.h>
0028 #include <__cxx03/new>
0029
0030 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0031 #  pragma GCC system_header
0032 #endif
0033
0034 _LIBCPP_PUSH_MACROS
0035 #include <__cxx03/__undef_macros>
0036
0037 _LIBCPP_BEGIN_NAMESPACE_STD
0038
0039 #if _LIBCPP_STD_VER >= 20
0040
0041 namespace ranges {
0042
0043 // uninitialized_default_construct
0044
0045 namespace __uninitialized_default_construct {
0046
0047 struct __fn {
0048   template <__nothrow_forward_iterator _ForwardIterator, __nothrow_sentinel_for<_ForwardIterator> _Sentinel>
0049     requires default_initializable<iter_value_t<_ForwardIterator>>
0050   _LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last) const {
0051     using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
0052     return std::__uninitialized_default_construct<_ValueType>(std::move(__first), std::move(__last));
0053   }
0054
0055   template <__nothrow_forward_range _ForwardRange>
0056     requires default_initializable<range_value_t<_ForwardRange>>
0057   _LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range) const {
0058     return (*this)(ranges::begin(__range), ranges::end(__range));
0059   }
0060 };
0061
0062 } // namespace __uninitialized_default_construct
0063
0064 inline namespace __cpo {
0065 inline constexpr auto uninitialized_default_construct = __uninitialized_default_construct::__fn{};
0066 } // namespace __cpo
0067
0068 // uninitialized_default_construct_n
0069
0070 namespace __uninitialized_default_construct_n {
0071
0072 struct __fn {
0073   template <__nothrow_forward_iterator _ForwardIterator>
0074     requires default_initializable<iter_value_t<_ForwardIterator>>
0075   _LIBCPP_HIDE_FROM_ABI _ForwardIterator
0076   operator()(_ForwardIterator __first, iter_difference_t<_ForwardIterator> __n) const {
0077     using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
0078     return std::__uninitialized_default_construct_n<_ValueType>(std::move(__first), __n);
0079   }
0080 };
0081
0082 } // namespace __uninitialized_default_construct_n
0083
0084 inline namespace __cpo {
0085 inline constexpr auto uninitialized_default_construct_n = __uninitialized_default_construct_n::__fn{};
0086 } // namespace __cpo
0087
0088 // uninitialized_value_construct
0089
0090 namespace __uninitialized_value_construct {
0091
0092 struct __fn {
0093   template <__nothrow_forward_iterator _ForwardIterator, __nothrow_sentinel_for<_ForwardIterator> _Sentinel>
0094     requires default_initializable<iter_value_t<_ForwardIterator>>
0095   _LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last) const {
0096     using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
0097     return std::__uninitialized_value_construct<_ValueType>(std::move(__first), std::move(__last));
0098   }
0099
0100   template <__nothrow_forward_range _ForwardRange>
0101     requires default_initializable<range_value_t<_ForwardRange>>
0102   _LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range) const {
0103     return (*this)(ranges::begin(__range), ranges::end(__range));
0104   }
0105 };
0106
0107 } // namespace __uninitialized_value_construct
0108
0109 inline namespace __cpo {
0110 inline constexpr auto uninitialized_value_construct = __uninitialized_value_construct::__fn{};
0111 } // namespace __cpo
0112
0113 // uninitialized_value_construct_n
0114
0115 namespace __uninitialized_value_construct_n {
0116
0117 struct __fn {
0118   template <__nothrow_forward_iterator _ForwardIterator>
0119     requires default_initializable<iter_value_t<_ForwardIterator>>
0120   _LIBCPP_HIDE_FROM_ABI _ForwardIterator
0121   operator()(_ForwardIterator __first, iter_difference_t<_ForwardIterator> __n) const {
0122     using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
0123     return std::__uninitialized_value_construct_n<_ValueType>(std::move(__first), __n);
0124   }
0125 };
0126
0127 } // namespace __uninitialized_value_construct_n
0128
0129 inline namespace __cpo {
0130 inline constexpr auto uninitialized_value_construct_n = __uninitialized_value_construct_n::__fn{};
0131 } // namespace __cpo
0132
0133 // uninitialized_fill
0134
0135 namespace __uninitialized_fill {
0136
0137 struct __fn {
0138   template <__nothrow_forward_iterator _ForwardIterator, __nothrow_sentinel_for<_ForwardIterator> _Sentinel, class _Tp>
0139     requires constructible_from<iter_value_t<_ForwardIterator>, const _Tp&>
0140   _LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last, const _Tp& __x) const {
0141     using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
0142     return std::__uninitialized_fill<_ValueType>(std::move(__first), std::move(__last), __x);
0143   }
0144
0145   template <__nothrow_forward_range _ForwardRange, class _Tp>
0146     requires constructible_from<range_value_t<_ForwardRange>, const _Tp&>
0147   _LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range, const _Tp& __x) const {
0148     return (*this)(ranges::begin(__range), ranges::end(__range), __x);
0149   }
0150 };
0151
0152 } // namespace __uninitialized_fill
0153
0154 inline namespace __cpo {
0155 inline constexpr auto uninitialized_fill = __uninitialized_fill::__fn{};
0156 } // namespace __cpo
0157
0158 // uninitialized_fill_n
0159
0160 namespace __uninitialized_fill_n {
0161
0162 struct __fn {
0163   template <__nothrow_forward_iterator _ForwardIterator, class _Tp>
0164     requires constructible_from<iter_value_t<_ForwardIterator>, const _Tp&>
0165   _LIBCPP_HIDE_FROM_ABI _ForwardIterator
0166   operator()(_ForwardIterator __first, iter_difference_t<_ForwardIterator> __n, const _Tp& __x) const {
0167     using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
0168     return std::__uninitialized_fill_n<_ValueType>(std::move(__first), __n, __x);
0169   }
0170 };
0171
0172 } // namespace __uninitialized_fill_n
0173
0174 inline namespace __cpo {
0175 inline constexpr auto uninitialized_fill_n = __uninitialized_fill_n::__fn{};
0176 } // namespace __cpo
0177
0178 // uninitialized_copy
0179
0180 template <class _InputIterator, class _OutputIterator>
0181 using uninitialized_copy_result = in_out_result<_InputIterator, _OutputIterator>;
0182
0183 namespace __uninitialized_copy {
0184
0185 struct __fn {
0186   template <input_iterator _InputIterator,
0187             sentinel_for<_InputIterator> _Sentinel1,
0188             __nothrow_forward_iterator _OutputIterator,
0189             __nothrow_sentinel_for<_OutputIterator> _Sentinel2>
0190     requires constructible_from<iter_value_t<_OutputIterator>, iter_reference_t<_InputIterator>>
0191   _LIBCPP_HIDE_FROM_ABI uninitialized_copy_result<_InputIterator, _OutputIterator>
0192   operator()(_InputIterator __ifirst, _Sentinel1 __ilast, _OutputIterator __ofirst, _Sentinel2 __olast) const {
0193     using _ValueType = remove_reference_t<iter_reference_t<_OutputIterator>>;
0194
0195     auto __stop_copying = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
0196     auto __result       = std::__uninitialized_copy<_ValueType>(
0197         std::move(__ifirst), std::move(__ilast), std::move(__ofirst), __stop_copying);
0198     return {std::move(__result.first), std::move(__result.second)};
0199   }
0200
0201   template <input_range _InputRange, __nothrow_forward_range _OutputRange>
0202     requires constructible_from<range_value_t<_OutputRange>, range_reference_t<_InputRange>>
0203   _LIBCPP_HIDE_FROM_ABI uninitialized_copy_result<borrowed_iterator_t<_InputRange>, borrowed_iterator_t<_OutputRange>>
0204   operator()(_InputRange&& __in_range, _OutputRange&& __out_range) const {
0205     return (*this)(
0206         ranges::begin(__in_range), ranges::end(__in_range), ranges::begin(__out_range), ranges::end(__out_range));
0207   }
0208 };
0209
0210 } // namespace __uninitialized_copy
0211
0212 inline namespace __cpo {
0213 inline constexpr auto uninitialized_copy = __uninitialized_copy::__fn{};
0214 } // namespace __cpo
0215
0216 // uninitialized_copy_n
0217
0218 template <class _InputIterator, class _OutputIterator>
0219 using uninitialized_copy_n_result = in_out_result<_InputIterator, _OutputIterator>;
0220
0221 namespace __uninitialized_copy_n {
0222
0223 struct __fn {
0224   template <input_iterator _InputIterator,
0225             __nothrow_forward_iterator _OutputIterator,
0226             __nothrow_sentinel_for<_OutputIterator> _Sentinel>
0227     requires constructible_from<iter_value_t<_OutputIterator>, iter_reference_t<_InputIterator>>
0228   _LIBCPP_HIDE_FROM_ABI uninitialized_copy_n_result<_InputIterator, _OutputIterator>
0229   operator()(_InputIterator __ifirst,
0230              iter_difference_t<_InputIterator> __n,
0231              _OutputIterator __ofirst,
0232              _Sentinel __olast) const {
0233     using _ValueType    = remove_reference_t<iter_reference_t<_OutputIterator>>;
0234     auto __stop_copying = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
0235     auto __result =
0236         std::__uninitialized_copy_n<_ValueType>(std::move(__ifirst), __n, std::move(__ofirst), __stop_copying);
0237     return {std::move(__result.first), std::move(__result.second)};
0238   }
0239 };
0240
0241 } // namespace __uninitialized_copy_n
0242
0243 inline namespace __cpo {
0244 inline constexpr auto uninitialized_copy_n = __uninitialized_copy_n::__fn{};
0245 } // namespace __cpo
0246
0247 // uninitialized_move
0248
0249 template <class _InputIterator, class _OutputIterator>
0250 using uninitialized_move_result = in_out_result<_InputIterator, _OutputIterator>;
0251
0252 namespace __uninitialized_move {
0253
0254 struct __fn {
0255   template <input_iterator _InputIterator,
0256             sentinel_for<_InputIterator> _Sentinel1,
0257             __nothrow_forward_iterator _OutputIterator,
0258             __nothrow_sentinel_for<_OutputIterator> _Sentinel2>
0259     requires constructible_from<iter_value_t<_OutputIterator>, iter_rvalue_reference_t<_InputIterator>>
0260   _LIBCPP_HIDE_FROM_ABI uninitialized_move_result<_InputIterator, _OutputIterator>
0261   operator()(_InputIterator __ifirst, _Sentinel1 __ilast, _OutputIterator __ofirst, _Sentinel2 __olast) const {
0262     using _ValueType   = remove_reference_t<iter_reference_t<_OutputIterator>>;
0263     auto __iter_move   = [](auto&& __iter) -> decltype(auto) { return ranges::iter_move(__iter); };
0264     auto __stop_moving = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
0265     auto __result      = std::__uninitialized_move<_ValueType>(
0266         std::move(__ifirst), std::move(__ilast), std::move(__ofirst), __stop_moving, __iter_move);
0267     return {std::move(__result.first), std::move(__result.second)};
0268   }
0269
0270   template <input_range _InputRange, __nothrow_forward_range _OutputRange>
0271     requires constructible_from<range_value_t<_OutputRange>, range_rvalue_reference_t<_InputRange>>
0272   _LIBCPP_HIDE_FROM_ABI uninitialized_move_result<borrowed_iterator_t<_InputRange>, borrowed_iterator_t<_OutputRange>>
0273   operator()(_InputRange&& __in_range, _OutputRange&& __out_range) const {
0274     return (*this)(
0275         ranges::begin(__in_range), ranges::end(__in_range), ranges::begin(__out_range), ranges::end(__out_range));
0276   }
0277 };
0278
0279 } // namespace __uninitialized_move
0280
0281 inline namespace __cpo {
0282 inline constexpr auto uninitialized_move = __uninitialized_move::__fn{};
0283 } // namespace __cpo
0284
0285 // uninitialized_move_n
0286
0287 template <class _InputIterator, class _OutputIterator>
0288 using uninitialized_move_n_result = in_out_result<_InputIterator, _OutputIterator>;
0289
0290 namespace __uninitialized_move_n {
0291
0292 struct __fn {
0293   template <input_iterator _InputIterator,
0294             __nothrow_forward_iterator _OutputIterator,
0295             __nothrow_sentinel_for<_OutputIterator> _Sentinel>
0296     requires constructible_from<iter_value_t<_OutputIterator>, iter_rvalue_reference_t<_InputIterator>>
0297   _LIBCPP_HIDE_FROM_ABI uninitialized_move_n_result<_InputIterator, _OutputIterator>
0298   operator()(_InputIterator __ifirst,
0299              iter_difference_t<_InputIterator> __n,
0300              _OutputIterator __ofirst,
0301              _Sentinel __olast) const {
0302     using _ValueType   = remove_reference_t<iter_reference_t<_OutputIterator>>;
0303     auto __iter_move   = [](auto&& __iter) -> decltype(auto) { return ranges::iter_move(__iter); };
0304     auto __stop_moving = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
0305     auto __result      = std::__uninitialized_move_n<_ValueType>(
0306         std::move(__ifirst), __n, std::move(__ofirst), __stop_moving, __iter_move);
0307     return {std::move(__result.first), std::move(__result.second)};
0308   }
0309 };
0310
0311 } // namespace __uninitialized_move_n
0312
0313 inline namespace __cpo {
0314 inline constexpr auto uninitialized_move_n = __uninitialized_move_n::__fn{};
0315 } // namespace __cpo
0316
0317 } // namespace ranges
0318
0319 #endif // _LIBCPP_STD_VER >= 20
0320
0321 _LIBCPP_END_NAMESPACE_STD
0322
0323 _LIBCPP_POP_MACROS
0324
0325 #endif // _LIBCPP___CXX03___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H