}
} // namespace __detail
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr bool
- all_of(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (!(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
- return false;
- return true;
- }
+ struct __all_of_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (!(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ return false;
+ return true;
+ }
- template<input_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- constexpr bool
- all_of(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::all_of(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr bool
- any_of(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- return true;
- return false;
- }
+ template<input_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
- template<input_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- constexpr bool
- any_of(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::any_of(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr bool
- none_of(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- return false;
- return true;
- }
+ inline constexpr __all_of_fn all_of{};
- template<input_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- constexpr bool
- none_of(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::none_of(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
+ struct __any_of_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ return true;
+ return false;
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __any_of_fn any_of{};
+
+ struct __none_of_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ return false;
+ return true;
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __none_of_fn none_of{};
template<typename _Iter, typename _Fp>
struct for_each_result
{ return {std::move(in), std::move(fun)}; }
};
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirectly_unary_invocable<projected<_Iter, _Proj>> _Fun>
- constexpr for_each_result<_Iter, _Fun>
- for_each(_Iter __first, _Sent __last, _Fun __f, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- std::__invoke(__f, std::__invoke(__proj, *__first));
- return { std::move(__first), std::move(__f) };
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirectly_unary_invocable<projected<iterator_t<_Range>, _Proj>>
- _Fun>
- constexpr for_each_result<safe_iterator_t<_Range>, _Fun>
- for_each(_Range&& __r, _Fun __f, _Proj __proj = {})
- {
- return ranges::for_each(ranges::begin(__r), ranges::end(__r),
- std::move(__f), std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent, typename _Tp,
- typename _Proj = identity>
- requires indirect_binary_predicate<ranges::equal_to,
- projected<_Iter, _Proj>, const _Tp*>
- constexpr _Iter
- find(_Iter __first, _Sent __last, const _Tp& __value, _Proj __proj = {})
- {
- while (__first != __last
- && !(std::__invoke(__proj, *__first) == __value))
- ++__first;
- return __first;
- }
-
- template<input_range _Range, typename _Tp, typename _Proj = identity>
- requires indirect_binary_predicate<ranges::equal_to,
- projected<iterator_t<_Range>, _Proj>,
- const _Tp*>
- constexpr safe_iterator_t<_Range>
- find(_Range&& __r, const _Tp& __value, _Proj __proj = {})
- {
- return ranges::find(ranges::begin(__r), ranges::end(__r), __value,
- std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr _Iter
- find_if(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- while (__first != __last
- && !(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
- ++__first;
- return __first;
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>>
- _Pred>
- constexpr safe_iterator_t<_Range>
- find_if(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::find_if(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr _Iter
- find_if_not(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- while (__first != __last
- && (bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
- ++__first;
- return __first;
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>>
- _Pred>
- constexpr safe_iterator_t<_Range>
- find_if_not(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::find_if_not(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
- constexpr _Iter1
- find_first_of(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- for (; __first1 != __last1; ++__first1)
- for (auto __iter = __first2; __iter != __last2; ++__iter)
- if (std::__invoke(__pred,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__iter)))
- return __first1;
- return __first1;
- }
-
- template<input_range _Range1, forward_range _Range2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
- _Pred, _Proj1, _Proj2>
- constexpr safe_iterator_t<_Range1>
- find_first_of(_Range1&& __r1, _Range2&& __r2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::find_first_of(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__pred),
- std::move(__proj1), std::move(__proj2));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity>
- requires indirect_binary_predicate<ranges::equal_to,
- projected<_Iter, _Proj>,
- const _Tp*>
- constexpr iter_difference_t<_Iter>
- count(_Iter __first, _Sent __last, const _Tp& __value, _Proj __proj = {})
- {
- iter_difference_t<_Iter> __n = 0;
- for (; __first != __last; ++__first)
- if (std::__invoke(__proj, *__first) == __value)
- ++__n;
- return __n;
- }
-
- template<input_range _Range, typename _Tp, typename _Proj = identity>
- requires indirect_binary_predicate<ranges::equal_to,
- projected<iterator_t<_Range>, _Proj>,
- const _Tp*>
- constexpr range_difference_t<_Range>
- count(_Range&& __r, const _Tp& __value, _Proj __proj = {})
- {
- return ranges::count(ranges::begin(__r), ranges::end(__r),
- __value, std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr iter_difference_t<_Iter>
- count_if(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- iter_difference_t<_Iter> __n = 0;
- for (; __first != __last; ++__first)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- ++__n;
- return __n;
- }
-
- template<input_range _Range,
- typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- constexpr range_difference_t<_Range>
- count_if(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::count_if(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
+ struct __for_each_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirectly_unary_invocable<projected<_Iter, _Proj>> _Fun>
+ constexpr for_each_result<_Iter, _Fun>
+ operator()(_Iter __first, _Sent __last, _Fun __f, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ std::__invoke(__f, std::__invoke(__proj, *__first));
+ return { std::move(__first), std::move(__f) };
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirectly_unary_invocable<projected<iterator_t<_Range>, _Proj>>
+ _Fun>
+ constexpr for_each_result<safe_iterator_t<_Range>, _Fun>
+ operator()(_Range&& __r, _Fun __f, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__f), std::move(__proj));
+ }
+ };
+
+ inline constexpr __for_each_fn for_each{};
+
+ struct __find_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent, typename _Tp,
+ typename _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to,
+ projected<_Iter, _Proj>, const _Tp*>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, const _Tp& __value, _Proj __proj = {}) const
+ {
+ while (__first != __last
+ && !(std::__invoke(__proj, *__first) == __value))
+ ++__first;
+ return __first;
+ }
+
+ template<input_range _Range, typename _Tp, typename _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to,
+ projected<iterator_t<_Range>, _Proj>,
+ const _Tp*>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, const _Tp& __value, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r), __value,
+ std::move(__proj));
+ }
+ };
+
+ inline constexpr __find_fn find{};
+
+ struct __find_if_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ while (__first != __last
+ && !(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ ++__first;
+ return __first;
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>>
+ _Pred>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __find_if_fn find_if{};
+
+ struct __find_if_not_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ while (__first != __last
+ && (bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ ++__first;
+ return __first;
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>>
+ _Pred>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __find_if_not_fn find_if_not{};
+
+ struct __find_first_of_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
+ constexpr _Iter1
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ for (; __first1 != __last1; ++__first1)
+ for (auto __iter = __first2; __iter != __last2; ++__iter)
+ if (std::__invoke(__pred,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__iter)))
+ return __first1;
+ return __first1;
+ }
+
+ template<input_range _Range1, forward_range _Range2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
+ _Pred, _Proj1, _Proj2>
+ constexpr safe_iterator_t<_Range1>
+ operator()(_Range1&& __r1, _Range2&& __r2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__pred),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __find_first_of_fn find_first_of{};
+
+ struct __count_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to,
+ projected<_Iter, _Proj>,
+ const _Tp*>
+ constexpr iter_difference_t<_Iter>
+ operator()(_Iter __first, _Sent __last, const _Tp& __value, _Proj __proj = {}) const
+ {
+ iter_difference_t<_Iter> __n = 0;
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__proj, *__first) == __value)
+ ++__n;
+ return __n;
+ }
+
+ template<input_range _Range, typename _Tp, typename _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to,
+ projected<iterator_t<_Range>, _Proj>,
+ const _Tp*>
+ constexpr range_difference_t<_Range>
+ operator()(_Range&& __r, const _Tp& __value, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ __value, std::move(__proj));
+ }
+ };
+
+ inline constexpr __count_fn count{};
+
+ struct __count_if_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr iter_difference_t<_Iter>
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ iter_difference_t<_Iter> __n = 0;
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ ++__n;
+ return __n;
+ }
+
+ template<input_range _Range,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ constexpr range_difference_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __count_if_fn count_if{};
template<typename _Iter1, typename _Iter2>
struct mismatch_result
{ return {std::move(in1), std::move(in2)}; }
};
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
- constexpr mismatch_result<_Iter1, _Iter2>
- mismatch(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2
- && (bool)std::__invoke(__pred,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- {
- ++__first1;
- ++__first2;
- }
- return { std::move(__first1), std::move(__first2) };
- }
-
- template<input_range _Range1, input_range _Range2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
- _Pred, _Proj1, _Proj2>
- constexpr mismatch_result<iterator_t<_Range1>, iterator_t<_Range2>>
- mismatch(_Range1&& __r1, _Range2&& __r2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::mismatch(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__pred),
- std::move(__proj1), std::move(__proj2));
- }
-
- template<forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
- constexpr subrange<_Iter1>
- search(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- if (__first1 == __last1 || __first2 == __last2)
- return {__first1, __first1};
-
- for (;;)
- {
- for (;;)
- {
- if (__first1 == __last1)
- return {__first1, __first1};
- if (std::__invoke(__pred,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- break;
- ++__first1;
- }
- auto __cur1 = __first1;
- auto __cur2 = __first2;
- for (;;)
- {
- if (++__cur2 == __last2)
- return {__first1, ++__cur1};
- if (++__cur1 == __last1)
- return {__cur1, __cur1};
- if (!(bool)std::__invoke(__pred,
- std::__invoke(__proj1, *__cur1),
- std::__invoke(__proj2, *__cur2)))
- {
- ++__first1;
- break;
- }
- }
- }
- }
-
- template<forward_range _Range1, forward_range _Range2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
- _Pred, _Proj1, _Proj2>
- constexpr safe_subrange_t<_Range1>
- search(_Range1&& __r1, _Range2&& __r2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::search(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__pred),
- std::move(__proj1), std::move(__proj2));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent, typename _Tp,
- typename _Pred = ranges::equal_to, typename _Proj = identity>
- requires indirectly_comparable<_Iter, const _Tp*, _Pred, _Proj>
- constexpr subrange<_Iter>
- search_n(_Iter __first, _Sent __last, iter_difference_t<_Iter> __count,
- const _Tp& __value, _Pred __pred = {}, _Proj __proj = {})
- {
- if (__count <= 0)
- return {__first, __first};
-
- auto __value_comp = [&] <typename _Rp> (_Rp&& __arg) {
- return std::__invoke(__pred, std::forward<_Rp>(__arg), __value);
- };
- if (__count == 1)
+ struct __mismatch_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
+ constexpr mismatch_result<_Iter1, _Iter2>
+ operator()(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2
+ && (bool)std::__invoke(__pred,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
{
- __first = ranges::find_if(std::move(__first), __last,
- std::move(__value_comp), std::move(__proj));
- if (__first == __last)
- return {__first, __first};
- else
- {
- auto __end = __first;
- return {__first, ++__end};
- }
+ ++__first1;
+ ++__first2;
}
+ return { std::move(__first1), std::move(__first2) };
+ }
- if constexpr (sized_sentinel_for<_Sent, _Iter>)
- {
- auto __tail_size = __last - __first;
- auto __remainder = __count;
-
- while (__remainder <= __tail_size)
- {
- __first += __remainder;
- __tail_size -= __remainder;
- auto __backtrack = __first;
- while (__value_comp(std::__invoke(__proj, *--__backtrack)))
- {
- if (--__remainder == 0)
- return {__first - __count, __first};
- }
- }
- auto __i = __first + __tail_size;
- return {__i, __i};
- }
- else
- {
- __first = ranges::find_if(__first, __last, __value_comp, __proj);
- while (__first != __last)
- {
- auto __n = __count;
- auto __i = __first;
- ++__i;
- while (__i != __last && __n != 1
- && __value_comp(std::__invoke(__proj, *__i)))
- {
- ++__i;
- --__n;
- }
- if (__n == 1)
- return {__first, __i};
- if (__i == __last)
- return {__i, __i};
- __first = ranges::find_if(++__i, __last, __value_comp, __proj);
- }
- return {__first, __first};
- }
- }
-
- template<forward_range _Range, typename _Tp,
- typename _Pred = ranges::equal_to, typename _Proj = identity>
- requires indirectly_comparable<iterator_t<_Range>, const _Tp*, _Pred, _Proj>
- constexpr safe_subrange_t<_Range>
- search_n(_Range&& __r, range_difference_t<_Range> __count,
- const _Tp& __value, _Pred __pred = {}, _Proj __proj = {})
- {
- return ranges::search_n(ranges::begin(__r), ranges::end(__r),
- std::move(__count), __value,
- std::move(__pred), std::move(__proj));
- }
+ template<input_range _Range1, input_range _Range2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
+ _Pred, _Proj1, _Proj2>
+ constexpr mismatch_result<iterator_t<_Range1>, iterator_t<_Range2>>
+ operator()(_Range1&& __r1, _Range2&& __r2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__pred),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+ inline constexpr __mismatch_fn mismatch{};
+ struct __search_fn
+ {
+ template<forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
+ constexpr subrange<_Iter1>
+ operator()(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ if (__first1 == __last1 || __first2 == __last2)
+ return {__first1, __first1};
- template<forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
- constexpr subrange<_Iter1>
- find_end(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- if constexpr (bidirectional_iterator<_Iter1>
- && bidirectional_iterator<_Iter2>)
- {
- auto __i1 = ranges::next(__first1, __last1);
- auto __i2 = ranges::next(__first2, __last2);
- auto __rresult
- = ranges::search(reverse_iterator<_Iter1>{__i1},
- reverse_iterator<_Iter1>{__first1},
- reverse_iterator<_Iter2>{__i2},
- reverse_iterator<_Iter2>{__first2},
- std::move(__pred),
- std::move(__proj1), std::move(__proj2));
- auto __result_first = ranges::end(__rresult).base();
- auto __result_last = ranges::begin(__rresult).base();
- if (__result_last == __first1)
- return {__i1, __i1};
- else
- return {__result_first, __result_last};
- }
- else
- {
- auto __i = ranges::next(__first1, __last1);
- if (__first2 == __last2)
- return {__i, __i};
+ for (;;)
+ {
+ for (;;)
+ {
+ if (__first1 == __last1)
+ return {__first1, __first1};
+ if (std::__invoke(__pred,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ break;
+ ++__first1;
+ }
+ auto __cur1 = __first1;
+ auto __cur2 = __first2;
+ for (;;)
+ {
+ if (++__cur2 == __last2)
+ return {__first1, ++__cur1};
+ if (++__cur1 == __last1)
+ return {__cur1, __cur1};
+ if (!(bool)std::__invoke(__pred,
+ std::__invoke(__proj1, *__cur1),
+ std::__invoke(__proj2, *__cur2)))
+ {
+ ++__first1;
+ break;
+ }
+ }
+ }
+ }
- auto __result_begin = __i;
- auto __result_end = __i;
- for (;;)
- {
- auto __new_range = ranges::search(__first1, __last1,
- __first2, __last2,
- __pred, __proj1, __proj2);
- auto __new_result_begin = ranges::begin(__new_range);
- auto __new_result_end = ranges::end(__new_range);
- if (__new_result_begin == __last1)
- return {__result_begin, __result_end};
- else
- {
- __result_begin = __new_result_begin;
- __result_end = __new_result_end;
- __first1 = __result_begin;
- ++__first1;
- }
- }
- }
- }
-
- template<forward_range _Range1, forward_range _Range2,
- typename _Pred = ranges::equal_to,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
- _Pred, _Proj1, _Proj2>
- constexpr safe_subrange_t<_Range1>
- find_end(_Range1&& __r1, _Range2&& __r2,
- _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::find_end(ranges::begin(__r1), ranges::end(__r1),
+ template<forward_range _Range1, forward_range _Range2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
+ _Pred, _Proj1, _Proj2>
+ constexpr safe_subrange_t<_Range1>
+ operator()(_Range1&& __r1, _Range2&& __r2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
ranges::begin(__r2), ranges::end(__r2),
std::move(__pred),
std::move(__proj1), std::move(__proj2));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_binary_predicate<projected<_Iter, _Proj>,
- projected<_Iter, _Proj>> _Pred
- = ranges::equal_to>
- constexpr _Iter
- adjacent_find(_Iter __first, _Sent __last,
- _Pred __pred = {}, _Proj __proj = {})
- {
- if (__first == __last)
- return __first;
- auto __next = __first;
- for (; ++__next != __last; __first = __next)
- {
- if (std::__invoke(__pred,
- std::__invoke(__proj, *__first),
- std::__invoke(__proj, *__next)))
- return __first;
- }
- return __next;
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_binary_predicate<
- projected<iterator_t<_Range>, _Proj>,
- projected<iterator_t<_Range>, _Proj>> _Pred = ranges::equal_to>
- constexpr safe_iterator_t<_Range>
- adjacent_find(_Range&& __r, _Pred __pred = {}, _Proj __proj = {})
- {
- return ranges::adjacent_find(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Proj1 = identity, typename _Proj2 = identity,
- indirect_equivalence_relation<projected<_Iter1, _Proj1>,
- projected<_Iter2, _Proj2>> _Pred
- = ranges::equal_to>
- constexpr bool
- is_permutation(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2, _Pred __pred = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- constexpr bool __sized_iters
- = (sized_sentinel_for<_Sent1, _Iter1>
- && sized_sentinel_for<_Sent2, _Iter2>);
- if constexpr (__sized_iters)
- {
- auto __d1 = ranges::distance(__first1, __last1);
- auto __d2 = ranges::distance(__first2, __last2);
- if (__d1 != __d2)
- return false;
- }
+ }
+ };
- // Efficiently compare identical prefixes: O(N) if sequences
- // have the same elements in the same order.
- for (; __first1 != __last1 && __first2 != __last2;
- ++__first1, (void)++__first2)
- if (!(bool)std::__invoke(__pred,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- break;
+ inline constexpr __search_fn search{};
- if constexpr (__sized_iters)
- {
- if (__first1 == __last1)
- return true;
- }
- else
- {
- auto __d1 = ranges::distance(__first1, __last1);
- auto __d2 = ranges::distance(__first2, __last2);
- if (__d1 == 0 && __d2 == 0)
- return true;
- if (__d1 != __d2)
- return false;
- }
+ struct __search_n_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent, typename _Tp,
+ typename _Pred = ranges::equal_to, typename _Proj = identity>
+ requires indirectly_comparable<_Iter, const _Tp*, _Pred, _Proj>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Sent __last, iter_difference_t<_Iter> __count,
+ const _Tp& __value, _Pred __pred = {}, _Proj __proj = {}) const
+ {
+ if (__count <= 0)
+ return {__first, __first};
- for (auto __scan = __first1; __scan != __last1; ++__scan)
- {
- auto __proj_scan = std::__invoke(__proj1, *__scan);
- auto __comp_scan = [&] <typename _Tp> (_Tp&& __arg) {
- return std::__invoke(__pred, __proj_scan,
- std::forward<_Tp>(__arg));
- };
- if (__scan != ranges::find_if(__first1, __scan,
- __comp_scan, __proj1))
- continue; // We've seen this one before.
-
- auto __matches = ranges::count_if(__first2, __last2,
- __comp_scan, __proj2);
- if (__matches == 0
- || ranges::count_if(__scan, __last1,
- __comp_scan, __proj1) != __matches)
- return false;
- }
- return true;
- }
-
- template<forward_range _Range1, forward_range _Range2,
- typename _Proj1 = identity, typename _Proj2 = identity,
- indirect_equivalence_relation<
- projected<iterator_t<_Range1>, _Proj1>,
- projected<iterator_t<_Range2>, _Proj2>> _Pred = ranges::equal_to>
- constexpr bool
- is_permutation(_Range1&& __r1, _Range2&& __r2, _Pred __pred = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::is_permutation(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__pred),
- std::move(__proj1), std::move(__proj2));
- }
+ auto __value_comp = [&] <typename _Rp> (_Rp&& __arg) {
+ return std::__invoke(__pred, std::forward<_Rp>(__arg), __value);
+ };
+ if (__count == 1)
+ {
+ __first = ranges::find_if(std::move(__first), __last,
+ std::move(__value_comp), std::move(__proj));
+ if (__first == __last)
+ return {__first, __first};
+ else
+ {
+ auto __end = __first;
+ return {__first, ++__end};
+ }
+ }
- template<typename _Iter, typename _Out>
- using copy_if_result = copy_result<_Iter, _Out>;
+ if constexpr (sized_sentinel_for<_Sent, _Iter>)
+ {
+ auto __tail_size = __last - __first;
+ auto __remainder = __count;
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out, typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- requires indirectly_copyable<_Iter, _Out>
- constexpr copy_if_result<_Iter, _Out>
- copy_if(_Iter __first, _Sent __last, _Out __result,
- _Pred __pred, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ while (__remainder <= __tail_size)
+ {
+ __first += __remainder;
+ __tail_size -= __remainder;
+ auto __backtrack = __first;
+ while (__value_comp(std::__invoke(__proj, *--__backtrack)))
+ {
+ if (--__remainder == 0)
+ return {__first - __count, __first};
+ }
+ }
+ auto __i = __first + __tail_size;
+ return {__i, __i};
+ }
+ else
{
- *__result = *__first;
- ++__result;
+ __first = ranges::find_if(__first, __last, __value_comp, __proj);
+ while (__first != __last)
+ {
+ auto __n = __count;
+ auto __i = __first;
+ ++__i;
+ while (__i != __last && __n != 1
+ && __value_comp(std::__invoke(__proj, *__i)))
+ {
+ ++__i;
+ --__n;
+ }
+ if (__n == 1)
+ return {__first, __i};
+ if (__i == __last)
+ return {__i, __i};
+ __first = ranges::find_if(++__i, __last, __value_comp, __proj);
+ }
+ return {__first, __first};
}
- return {std::move(__first), std::move(__result)};
- }
-
- template<input_range _Range, weakly_incrementable _Out,
- typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- constexpr copy_if_result<safe_iterator_t<_Range>, _Out>
- copy_if(_Range&& __r, _Out __result, _Pred __pred, _Proj __proj = {})
- {
- return ranges::copy_if(ranges::begin(__r), ranges::end(__r),
- std::move(__result),
- std::move(__pred), std::move(__proj));
- }
-
- template<typename _Iter1, typename _Iter2>
- using swap_ranges_result = mismatch_result<_Iter1, _Iter2>;
+ }
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2>
- requires indirectly_swappable<_Iter1, _Iter2>
- constexpr swap_ranges_result<_Iter1, _Iter2>
- swap_ranges(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2)
- {
- for (; __first1 != __last1 && __first2 != __last2;
- ++__first1, (void)++__first2)
- ranges::iter_swap(__first1, __first2);
- return {std::move(__first1), std::move(__first2)};
- }
-
- template<input_range _Range1, input_range _Range2>
- requires indirectly_swappable<iterator_t<_Range1>, iterator_t<_Range2>>
- constexpr swap_ranges_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>>
- swap_ranges(_Range1&& __r1, _Range2&& __r2)
- {
- return ranges::swap_ranges(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2));
- }
+ template<forward_range _Range, typename _Tp,
+ typename _Pred = ranges::equal_to, typename _Proj = identity>
+ requires indirectly_comparable<iterator_t<_Range>, const _Tp*, _Pred, _Proj>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, range_difference_t<_Range> __count,
+ const _Tp& __value, _Pred __pred = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__count), __value,
+ std::move(__pred), std::move(__proj));
+ }
+ };
- template<typename _Iter, typename _Out>
- using unary_transform_result = copy_result<_Iter, _Out>;
+ inline constexpr __search_n_fn search_n{};
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out,
- copy_constructible _Fp, typename _Proj = identity>
- requires indirectly_writable<_Out,
- indirect_result_t<_Fp&,
- projected<_Iter, _Proj>>>
- constexpr unary_transform_result<_Iter, _Out>
- transform(_Iter __first1, _Sent __last1, _Out __result,
- _Fp __op, _Proj __proj = {})
- {
- for (; __first1 != __last1; ++__first1, (void)++__result)
- *__result = std::__invoke(__op, std::__invoke(__proj, *__first1));
- return {std::move(__first1), std::move(__result)};
- }
-
- template<input_range _Range, weakly_incrementable _Out,
- copy_constructible _Fp, typename _Proj = identity>
- requires indirectly_writable<_Out,
- indirect_result_t<_Fp&,
- projected<iterator_t<_Range>, _Proj>>>
- constexpr unary_transform_result<safe_iterator_t<_Range>, _Out>
- transform(_Range&& __r, _Out __result, _Fp __op, _Proj __proj = {})
- {
- return ranges::transform(ranges::begin(__r), ranges::end(__r),
- std::move(__result),
- std::move(__op), std::move(__proj));
- }
+ struct __find_end_fn
+ {
+ template<forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
+ constexpr subrange<_Iter1>
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ if constexpr (bidirectional_iterator<_Iter1>
+ && bidirectional_iterator<_Iter2>)
+ {
+ auto __i1 = ranges::next(__first1, __last1);
+ auto __i2 = ranges::next(__first2, __last2);
+ auto __rresult
+ = ranges::search(reverse_iterator<_Iter1>{__i1},
+ reverse_iterator<_Iter1>{__first1},
+ reverse_iterator<_Iter2>{__i2},
+ reverse_iterator<_Iter2>{__first2},
+ std::move(__pred),
+ std::move(__proj1), std::move(__proj2));
+ auto __result_first = ranges::end(__rresult).base();
+ auto __result_last = ranges::begin(__rresult).base();
+ if (__result_last == __first1)
+ return {__i1, __i1};
+ else
+ return {__result_first, __result_last};
+ }
+ else
+ {
+ auto __i = ranges::next(__first1, __last1);
+ if (__first2 == __last2)
+ return {__i, __i};
+
+ auto __result_begin = __i;
+ auto __result_end = __i;
+ for (;;)
+ {
+ auto __new_range = ranges::search(__first1, __last1,
+ __first2, __last2,
+ __pred, __proj1, __proj2);
+ auto __new_result_begin = ranges::begin(__new_range);
+ auto __new_result_end = ranges::end(__new_range);
+ if (__new_result_begin == __last1)
+ return {__result_begin, __result_end};
+ else
+ {
+ __result_begin = __new_result_begin;
+ __result_end = __new_result_end;
+ __first1 = __result_begin;
+ ++__first1;
+ }
+ }
+ }
+ }
+
+ template<forward_range _Range1, forward_range _Range2,
+ typename _Pred = ranges::equal_to,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>,
+ _Pred, _Proj1, _Proj2>
+ constexpr safe_subrange_t<_Range1>
+ operator()(_Range1&& __r1, _Range2&& __r2,
+ _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__pred),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __find_end_fn find_end{};
+
+ struct __adjacent_find_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_binary_predicate<projected<_Iter, _Proj>,
+ projected<_Iter, _Proj>> _Pred
+ = ranges::equal_to>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Pred __pred = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return __first;
+ auto __next = __first;
+ for (; ++__next != __last; __first = __next)
+ {
+ if (std::__invoke(__pred,
+ std::__invoke(__proj, *__first),
+ std::__invoke(__proj, *__next)))
+ return __first;
+ }
+ return __next;
+ }
+
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_binary_predicate<
+ projected<iterator_t<_Range>, _Proj>,
+ projected<iterator_t<_Range>, _Proj>> _Pred = ranges::equal_to>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Pred __pred = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __adjacent_find_fn adjacent_find{};
+
+ struct __is_permutation_fn
+ {
+ template<forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Proj1 = identity, typename _Proj2 = identity,
+ indirect_equivalence_relation<projected<_Iter1, _Proj1>,
+ projected<_Iter2, _Proj2>> _Pred
+ = ranges::equal_to>
+ constexpr bool
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2, _Pred __pred = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ constexpr bool __sized_iters
+ = (sized_sentinel_for<_Sent1, _Iter1>
+ && sized_sentinel_for<_Sent2, _Iter2>);
+ if constexpr (__sized_iters)
+ {
+ auto __d1 = ranges::distance(__first1, __last1);
+ auto __d2 = ranges::distance(__first2, __last2);
+ if (__d1 != __d2)
+ return false;
+ }
+
+ // Efficiently compare identical prefixes: O(N) if sequences
+ // have the same elements in the same order.
+ for (; __first1 != __last1 && __first2 != __last2;
+ ++__first1, (void)++__first2)
+ if (!(bool)std::__invoke(__pred,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ break;
+
+ if constexpr (__sized_iters)
+ {
+ if (__first1 == __last1)
+ return true;
+ }
+ else
+ {
+ auto __d1 = ranges::distance(__first1, __last1);
+ auto __d2 = ranges::distance(__first2, __last2);
+ if (__d1 == 0 && __d2 == 0)
+ return true;
+ if (__d1 != __d2)
+ return false;
+ }
+
+ for (auto __scan = __first1; __scan != __last1; ++__scan)
+ {
+ auto __proj_scan = std::__invoke(__proj1, *__scan);
+ auto __comp_scan = [&] <typename _Tp> (_Tp&& __arg) {
+ return std::__invoke(__pred, __proj_scan,
+ std::forward<_Tp>(__arg));
+ };
+ if (__scan != ranges::find_if(__first1, __scan,
+ __comp_scan, __proj1))
+ continue; // We've seen this one before.
+
+ auto __matches = ranges::count_if(__first2, __last2,
+ __comp_scan, __proj2);
+ if (__matches == 0
+ || ranges::count_if(__scan, __last1,
+ __comp_scan, __proj1) != __matches)
+ return false;
+ }
+ return true;
+ }
+
+ template<forward_range _Range1, forward_range _Range2,
+ typename _Proj1 = identity, typename _Proj2 = identity,
+ indirect_equivalence_relation<
+ projected<iterator_t<_Range1>, _Proj1>,
+ projected<iterator_t<_Range2>, _Proj2>> _Pred = ranges::equal_to>
+ constexpr bool
+ operator()(_Range1&& __r1, _Range2&& __r2, _Pred __pred = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__pred),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __is_permutation_fn is_permutation{};
+
+ template<typename _Iter, typename _Out>
+ using copy_if_result = copy_result<_Iter, _Out>;
+
+ struct __copy_if_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out, typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ requires indirectly_copyable<_Iter, _Out>
+ constexpr copy_if_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result,
+ _Pred __pred, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ {
+ *__result = *__first;
+ ++__result;
+ }
+ return {std::move(__first), std::move(__result)};
+ }
+
+ template<input_range _Range, weakly_incrementable _Out,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ constexpr copy_if_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __copy_if_fn copy_if{};
+
+ template<typename _Iter1, typename _Iter2>
+ using swap_ranges_result = mismatch_result<_Iter1, _Iter2>;
+
+ struct __swap_ranges_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2>
+ requires indirectly_swappable<_Iter1, _Iter2>
+ constexpr swap_ranges_result<_Iter1, _Iter2>
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2) const
+ {
+ for (; __first1 != __last1 && __first2 != __last2;
+ ++__first1, (void)++__first2)
+ ranges::iter_swap(__first1, __first2);
+ return {std::move(__first1), std::move(__first2)};
+ }
+
+ template<input_range _Range1, input_range _Range2>
+ requires indirectly_swappable<iterator_t<_Range1>, iterator_t<_Range2>>
+ constexpr swap_ranges_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>>
+ operator()(_Range1&& __r1, _Range2&& __r2) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2));
+ }
+ };
+
+ inline constexpr __swap_ranges_fn swap_ranges{};
+
+ template<typename _Iter, typename _Out>
+ using unary_transform_result = copy_result<_Iter, _Out>;
template<typename _Iter1, typename _Iter2, typename _Out>
struct binary_transform_result
{ return {std::move(in1), std::move(in2), std::move(out)}; }
};
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- weakly_incrementable _Out, copy_constructible _Fp,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_writable<_Out,
- indirect_result_t<_Fp&,
- projected<_Iter1, _Proj1>,
- projected<_Iter2, _Proj2>>>
- constexpr binary_transform_result<_Iter1, _Iter2, _Out>
- transform(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
- _Out __result, _Fp __binary_op,
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- for (; __first1 != __last1 && __first2 != __last2;
- ++__first1, (void)++__first2, ++__result)
- *__result = std::__invoke(__binary_op,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2));
- return {std::move(__first1), std::move(__first2), std::move(__result)};
- }
-
- template<input_range _Range1, input_range _Range2,
- weakly_incrementable _Out, copy_constructible _Fp,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_writable<_Out,
- indirect_result_t<_Fp&,
- projected<iterator_t<_Range1>, _Proj1>,
- projected<iterator_t<_Range2>, _Proj2>>>
- constexpr binary_transform_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>, _Out>
- transform(_Range1&& __r1, _Range2&& __r2, _Out __result,
- _Fp __binary_op, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::transform(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__result), std::move(__binary_op),
- std::move(__proj1), std::move(__proj2));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp1, typename _Tp2, typename _Proj = identity>
- requires indirectly_writable<_Iter, const _Tp2&>
- && indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>,
- const _Tp1*>
- constexpr _Iter
- replace(_Iter __first, _Sent __last,
- const _Tp1& __old_value, const _Tp2& __new_value,
- _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (std::__invoke(__proj, *__first) == __old_value)
- *__first = __new_value;
- return __first;
- }
-
- template<input_range _Range,
- typename _Tp1, typename _Tp2, typename _Proj = identity>
- requires indirectly_writable<iterator_t<_Range>, const _Tp2&>
- && indirect_binary_predicate<ranges::equal_to,
- projected<iterator_t<_Range>, _Proj>,
- const _Tp1*>
- constexpr safe_iterator_t<_Range>
- replace(_Range&& __r,
- const _Tp1& __old_value, const _Tp2& __new_value,
- _Proj __proj = {})
- {
- return ranges::replace(ranges::begin(__r), ranges::end(__r),
- __old_value, __new_value, std::move(__proj));
- }
-
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- requires indirectly_writable<_Iter, const _Tp&>
- constexpr _Iter
- replace_if(_Iter __first, _Sent __last,
- _Pred __pred, const _Tp& __new_value, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- *__first = __new_value;
- return std::move(__first);
- }
-
- template<input_range _Range, typename _Tp, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires indirectly_writable<iterator_t<_Range>, const _Tp&>
- constexpr safe_iterator_t<_Range>
- replace_if(_Range&& __r,
- _Pred __pred, const _Tp& __new_value, _Proj __proj = {})
- {
- return ranges::replace_if(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), __new_value,
- std::move(__proj));
- }
+ struct __transform_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out,
+ copy_constructible _Fp, typename _Proj = identity>
+ requires indirectly_writable<_Out,
+ indirect_result_t<_Fp&,
+ projected<_Iter, _Proj>>>
+ constexpr unary_transform_result<_Iter, _Out>
+ operator()(_Iter __first1, _Sent __last1, _Out __result,
+ _Fp __op, _Proj __proj = {}) const
+ {
+ for (; __first1 != __last1; ++__first1, (void)++__result)
+ *__result = std::__invoke(__op, std::__invoke(__proj, *__first1));
+ return {std::move(__first1), std::move(__result)};
+ }
- template<typename _Iter, typename _Out>
- using replace_copy_result = copy_result<_Iter, _Out>;
+ template<input_range _Range, weakly_incrementable _Out,
+ copy_constructible _Fp, typename _Proj = identity>
+ requires indirectly_writable<_Out,
+ indirect_result_t<_Fp&,
+ projected<iterator_t<_Range>, _Proj>>>
+ constexpr unary_transform_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result, _Fp __op, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result),
+ std::move(__op), std::move(__proj));
+ }
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp1, typename _Tp2, output_iterator<const _Tp2&> _Out,
- typename _Proj = identity>
- requires indirectly_copyable<_Iter, _Out>
- && indirect_binary_predicate<ranges::equal_to,
- projected<_Iter, _Proj>, const _Tp1*>
- constexpr replace_copy_result<_Iter, _Out>
- replace_copy(_Iter __first, _Sent __last, _Out __result,
- const _Tp1& __old_value, const _Tp2& __new_value,
- _Proj __proj = {})
- {
- for (; __first != __last; ++__first, (void)++__result)
- if (std::__invoke(__proj, *__first) == __old_value)
- *__result = __new_value;
- else
- *__result = *__first;
- return {std::move(__first), std::move(__result)};
- }
-
- template<input_range _Range, typename _Tp1, typename _Tp2,
- output_iterator<const _Tp2&> _Out, typename _Proj = identity>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- && indirect_binary_predicate<ranges::equal_to,
- projected<iterator_t<_Range>, _Proj>,
- const _Tp1*>
- constexpr replace_copy_result<safe_iterator_t<_Range>, _Out>
- replace_copy(_Range&& __r, _Out __result,
- const _Tp1& __old_value, const _Tp2& __new_value,
- _Proj __proj = {})
- {
- return ranges::replace_copy(ranges::begin(__r), ranges::end(__r),
- std::move(__result), __old_value,
- __new_value, std::move(__proj));
- }
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ weakly_incrementable _Out, copy_constructible _Fp,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_writable<_Out,
+ indirect_result_t<_Fp&,
+ projected<_Iter1, _Proj1>,
+ projected<_Iter2, _Proj2>>>
+ constexpr binary_transform_result<_Iter1, _Iter2, _Out>
+ operator()(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
+ _Out __result, _Fp __binary_op,
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ for (; __first1 != __last1 && __first2 != __last2;
+ ++__first1, (void)++__first2, ++__result)
+ *__result = std::__invoke(__binary_op,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2));
+ return {std::move(__first1), std::move(__first2), std::move(__result)};
+ }
- template<typename _Iter, typename _Out>
- using replace_copy_if_result = copy_result<_Iter, _Out>;
+ template<input_range _Range1, input_range _Range2,
+ weakly_incrementable _Out, copy_constructible _Fp,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_writable<_Out,
+ indirect_result_t<_Fp&,
+ projected<iterator_t<_Range1>, _Proj1>,
+ projected<iterator_t<_Range2>, _Proj2>>>
+ constexpr binary_transform_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>, _Out>
+ operator()(_Range1&& __r1, _Range2&& __r2, _Out __result,
+ _Fp __binary_op, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__result), std::move(__binary_op),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, output_iterator<const _Tp&> _Out,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- requires indirectly_copyable<_Iter, _Out>
- constexpr replace_copy_if_result<_Iter, _Out>
- replace_copy_if(_Iter __first, _Sent __last, _Out __result,
- _Pred __pred, const _Tp& __new_value, _Proj __proj = {})
- {
- for (; __first != __last; ++__first, (void)++__result)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- *__result = __new_value;
- else
- *__result = *__first;
- return {std::move(__first), std::move(__result)};
- }
-
- template<input_range _Range,
- typename _Tp, output_iterator<const _Tp&> _Out,
- typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- constexpr replace_copy_if_result<safe_iterator_t<_Range>, _Out>
- replace_copy_if(_Range&& __r, _Out __result,
- _Pred __pred, const _Tp& __new_value, _Proj __proj = {})
- {
- return ranges::replace_copy_if(ranges::begin(__r), ranges::end(__r),
- std::move(__result), std::move(__pred),
- __new_value, std::move(__proj));
- }
-
- template<input_or_output_iterator _Out, copy_constructible _Fp>
- requires invocable<_Fp&>
- && indirectly_writable<_Out, invoke_result_t<_Fp&>>
- constexpr _Out
- generate_n(_Out __first, iter_difference_t<_Out> __n, _Fp __gen)
- {
- for (; __n > 0; --__n, (void)++__first)
- *__first = std::__invoke(__gen);
- return __first;
- }
-
- template<input_or_output_iterator _Out, sentinel_for<_Out> _Sent,
- copy_constructible _Fp>
- requires invocable<_Fp&>
- && indirectly_writable<_Out, invoke_result_t<_Fp&>>
- constexpr _Out
- generate(_Out __first, _Sent __last, _Fp __gen)
- {
- for (; __first != __last; ++__first)
- *__first = std::__invoke(__gen);
- return __first;
- }
-
- template<typename _Range, copy_constructible _Fp>
- requires invocable<_Fp&> && output_range<_Range, invoke_result_t<_Fp&>>
- constexpr safe_iterator_t<_Range>
- generate(_Range&& __r, _Fp __gen)
- {
- return ranges::generate(ranges::begin(__r), ranges::end(__r),
- std::move(__gen));
- }
-
- template<permutable _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr subrange<_Iter>
- remove_if(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- __first = ranges::find_if(__first, __last, __pred, __proj);
- if (__first == __last)
- return {__first, __first};
+ inline constexpr __transform_fn transform{};
- auto __result = __first;
- ++__first;
- for (; __first != __last; ++__first)
- if (!(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
- {
- *__result = std::move(*__first);
- ++__result;
- }
+ struct __replace_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp1, typename _Tp2, typename _Proj = identity>
+ requires indirectly_writable<_Iter, const _Tp2&>
+ && indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>,
+ const _Tp1*>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ const _Tp1& __old_value, const _Tp2& __new_value,
+ _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__proj, *__first) == __old_value)
+ *__first = __new_value;
+ return __first;
+ }
- return {__result, __first};
- }
+ template<input_range _Range,
+ typename _Tp1, typename _Tp2, typename _Proj = identity>
+ requires indirectly_writable<iterator_t<_Range>, const _Tp2&>
+ && indirect_binary_predicate<ranges::equal_to,
+ projected<iterator_t<_Range>, _Proj>,
+ const _Tp1*>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r,
+ const _Tp1& __old_value, const _Tp2& __new_value,
+ _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ __old_value, __new_value, std::move(__proj));
+ }
+ };
- template<forward_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires permutable<iterator_t<_Range>>
- constexpr safe_subrange_t<_Range>
- remove_if(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::remove_if(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<permutable _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity>
- requires indirect_binary_predicate<ranges::equal_to,
- projected<_Iter, _Proj>,
- const _Tp*>
- constexpr subrange<_Iter>
- remove(_Iter __first, _Sent __last, const _Tp& __value, _Proj __proj = {})
- {
- auto __pred = [&] (auto&& __arg) {
- return std::forward<decltype(__arg)>(__arg) == __value;
- };
- return ranges::remove_if(__first, __last,
- std::move(__pred), std::move(__proj));
- }
-
- template<forward_range _Range, typename _Tp, typename _Proj = identity>
- requires permutable<iterator_t<_Range>>
- && indirect_binary_predicate<ranges::equal_to,
- projected<iterator_t<_Range>, _Proj>,
- const _Tp*>
- constexpr safe_subrange_t<_Range>
- remove(_Range&& __r, const _Tp& __value, _Proj __proj = {})
- {
- return ranges::remove(ranges::begin(__r), ranges::end(__r),
- __value, std::move(__proj));
- }
+ inline constexpr __replace_fn replace{};
- template<typename _Iter, typename _Out>
- using remove_copy_if_result = copy_result<_Iter, _Out>;
+ struct __replace_if_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ requires indirectly_writable<_Iter, const _Tp&>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Pred __pred, const _Tp& __new_value, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ *__first = __new_value;
+ return std::move(__first);
+ }
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out, typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- requires indirectly_copyable<_Iter, _Out>
- constexpr remove_copy_if_result<_Iter, _Out>
- remove_copy_if(_Iter __first, _Sent __last, _Out __result,
- _Pred __pred, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (!(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
- {
- *__result = *__first;
- ++__result;
- }
- return {std::move(__first), std::move(__result)};
- }
-
- template<input_range _Range, weakly_incrementable _Out,
- typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- constexpr remove_copy_if_result<safe_iterator_t<_Range>, _Out>
- remove_copy_if(_Range&& __r, _Out __result,
- _Pred __pred, _Proj __proj = {})
- {
- return ranges::remove_copy_if(ranges::begin(__r), ranges::end(__r),
- std::move(__result),
- std::move(__pred), std::move(__proj));
- }
+ template<input_range _Range, typename _Tp, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires indirectly_writable<iterator_t<_Range>, const _Tp&>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r,
+ _Pred __pred, const _Tp& __new_value, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), __new_value,
+ std::move(__proj));
+ }
+ };
+
+ inline constexpr __replace_if_fn replace_if{};
template<typename _Iter, typename _Out>
- using remove_copy_result = copy_result<_Iter, _Out>;
+ using replace_copy_result = copy_result<_Iter, _Out>;
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out, typename _Tp, typename _Proj = identity>
- requires indirectly_copyable<_Iter, _Out>
- && indirect_binary_predicate<ranges::equal_to,
- projected<_Iter, _Proj>,
- const _Tp*>
- constexpr remove_copy_result<_Iter, _Out>
- remove_copy(_Iter __first, _Sent __last, _Out __result,
- const _Tp& __value, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (!(std::__invoke(__proj, *__first) == __value))
- {
+ struct __replace_copy_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp1, typename _Tp2, output_iterator<const _Tp2&> _Out,
+ typename _Proj = identity>
+ requires indirectly_copyable<_Iter, _Out>
+ && indirect_binary_predicate<ranges::equal_to,
+ projected<_Iter, _Proj>, const _Tp1*>
+ constexpr replace_copy_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result,
+ const _Tp1& __old_value, const _Tp2& __new_value,
+ _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first, (void)++__result)
+ if (std::__invoke(__proj, *__first) == __old_value)
+ *__result = __new_value;
+ else
*__result = *__first;
- ++__result;
- }
- return {std::move(__first), std::move(__result)};
- }
-
- template<input_range _Range, weakly_incrementable _Out,
- typename _Tp, typename _Proj = identity>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- && indirect_binary_predicate<ranges::equal_to,
- projected<iterator_t<_Range>, _Proj>,
- const _Tp*>
- constexpr remove_copy_result<safe_iterator_t<_Range>, _Out>
- remove_copy(_Range&& __r, _Out __result,
- const _Tp& __value, _Proj __proj = {})
- {
- return ranges::remove_copy(ranges::begin(__r), ranges::end(__r),
- std::move(__result), __value,
- std::move(__proj));
-
- }
-
- template<permutable _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_equivalence_relation<
- projected<_Iter, _Proj>> _Comp = ranges::equal_to>
- constexpr subrange<_Iter>
- unique(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- __first = ranges::adjacent_find(__first, __last, __comp, __proj);
- if (__first == __last)
- return {__first, __first};
+ return {std::move(__first), std::move(__result)};
+ }
- auto __dest = __first;
- ++__first;
- while (++__first != __last)
- if (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *__dest),
- std::__invoke(__proj, *__first)))
- *++__dest = std::move(*__first);
- return {++__dest, __first};
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_equivalence_relation<
- projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to>
- requires permutable<iterator_t<_Range>>
- constexpr safe_subrange_t<_Range>
- unique(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::unique(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ template<input_range _Range, typename _Tp1, typename _Tp2,
+ output_iterator<const _Tp2&> _Out, typename _Proj = identity>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ && indirect_binary_predicate<ranges::equal_to,
+ projected<iterator_t<_Range>, _Proj>,
+ const _Tp1*>
+ constexpr replace_copy_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result,
+ const _Tp1& __old_value, const _Tp2& __new_value,
+ _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result), __old_value,
+ __new_value, std::move(__proj));
+ }
+ };
+
+ inline constexpr __replace_copy_fn replace_copy{};
template<typename _Iter, typename _Out>
- using unique_copy_result = copy_result<_Iter, _Out>;
+ using replace_copy_if_result = copy_result<_Iter, _Out>;
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out, typename _Proj = identity,
- indirect_equivalence_relation<
- projected<_Iter, _Proj>> _Comp = ranges::equal_to>
- requires indirectly_copyable<_Iter, _Out>
- && (forward_iterator<_Iter>
- || (input_iterator<_Out>
- && same_as<iter_value_t<_Iter>, iter_value_t<_Out>>)
- || indirectly_copyable_storable<_Iter, _Out>)
- constexpr unique_copy_result<_Iter, _Out>
- unique_copy(_Iter __first, _Sent __last, _Out __result,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
+ struct __replace_copy_if_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, output_iterator<const _Tp&> _Out,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ requires indirectly_copyable<_Iter, _Out>
+ constexpr replace_copy_if_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result,
+ _Pred __pred, const _Tp& __new_value, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first, (void)++__result)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ *__result = __new_value;
+ else
+ *__result = *__first;
return {std::move(__first), std::move(__result)};
+ }
- // TODO: perform a closer comparison with reference implementations
- if constexpr (forward_iterator<_Iter>)
- {
- auto __next = __first;
- *__result = *__next;
- while (++__next != __last)
- if (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *__first),
- std::__invoke(__proj, *__next)))
- {
- __first = __next;
- *++__result = *__first;
- }
- return {__next, std::move(++__result)};
- }
- else if constexpr (input_iterator<_Out>
- && same_as<iter_value_t<_Iter>, iter_value_t<_Out>>)
- {
- *__result = *__first;
- while (++__first != __last)
- if (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *__result),
- std::__invoke(__proj, *__first)))
- *++__result = *__first;
- return {std::move(__first), std::move(++__result)};
- }
- else // indirectly_copyable_storable<_Iter, _Out>
- {
- auto __value = *__first;
- *__result = __value;
- while (++__first != __last)
- {
- if (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *__first),
- std::__invoke(__proj, __value)))
- {
- __value = *__first;
- *++__result = __value;
- }
- }
- return {std::move(__first), std::move(++__result)};
- }
- }
-
- template<input_range _Range,
- weakly_incrementable _Out, typename _Proj = identity,
- indirect_equivalence_relation<
- projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- && (forward_iterator<iterator_t<_Range>>
- || (input_iterator<_Out>
- && same_as<range_value_t<_Range>, iter_value_t<_Out>>)
- || indirectly_copyable_storable<iterator_t<_Range>, _Out>)
- constexpr unique_copy_result<safe_iterator_t<_Range>, _Out>
- unique_copy(_Range&& __r, _Out __result,
- _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::unique_copy(ranges::begin(__r), ranges::end(__r),
- std::move(__result),
- std::move(__comp), std::move(__proj));
- }
-
- template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent>
- requires permutable<_Iter>
- constexpr _Iter
- reverse(_Iter __first, _Sent __last)
- {
- auto __i = ranges::next(__first, __last);
- auto __tail = __i;
+ template<input_range _Range,
+ typename _Tp, output_iterator<const _Tp&> _Out,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ constexpr replace_copy_if_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result,
+ _Pred __pred, const _Tp& __new_value, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result), std::move(__pred),
+ __new_value, std::move(__proj));
+ }
+ };
- if constexpr (random_access_iterator<_Iter>)
- {
- if (__first != __last)
- {
- --__tail;
- while (__first < __tail)
- {
- ranges::iter_swap(__first, __tail);
- ++__first;
- --__tail;
- }
- }
- return __i;
- }
- else
- {
- for (;;)
- if (__first == __tail || __first == --__tail)
- break;
- else
- {
- ranges::iter_swap(__first, __tail);
- ++__first;
- }
- return __i;
- }
- }
+ inline constexpr __replace_copy_if_fn replace_copy_if{};
- template<bidirectional_range _Range>
- requires permutable<iterator_t<_Range>>
- constexpr safe_iterator_t<_Range>
- reverse(_Range&& __r)
- {
- return ranges::reverse(ranges::begin(__r), ranges::end(__r));
- }
+ struct __generate_n_fn
+ {
+ template<input_or_output_iterator _Out, copy_constructible _Fp>
+ requires invocable<_Fp&>
+ && indirectly_writable<_Out, invoke_result_t<_Fp&>>
+ constexpr _Out
+ operator()(_Out __first, iter_difference_t<_Out> __n, _Fp __gen) const
+ {
+ for (; __n > 0; --__n, (void)++__first)
+ *__first = std::__invoke(__gen);
+ return __first;
+ }
+ };
- template<typename _Iter, typename _Out>
- using reverse_copy_result = copy_result<_Iter, _Out>;
+ inline constexpr __generate_n_fn generate_n{};
- template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out>
- requires indirectly_copyable<_Iter, _Out>
- constexpr reverse_copy_result<_Iter, _Out>
- reverse_copy(_Iter __first, _Sent __last, _Out __result)
- {
- auto __i = ranges::next(__first, __last);
- auto __tail = __i;
- while (__first != __tail)
- {
- --__tail;
- *__result = *__tail;
- ++__result;
- }
- return {__i, __result};
- }
+ struct __generate_fn
+ {
+ template<input_or_output_iterator _Out, sentinel_for<_Out> _Sent,
+ copy_constructible _Fp>
+ requires invocable<_Fp&>
+ && indirectly_writable<_Out, invoke_result_t<_Fp&>>
+ constexpr _Out
+ operator()(_Out __first, _Sent __last, _Fp __gen) const
+ {
+ for (; __first != __last; ++__first)
+ *__first = std::__invoke(__gen);
+ return __first;
+ }
- template<bidirectional_range _Range, weakly_incrementable _Out>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- constexpr reverse_copy_result<safe_iterator_t<_Range>, _Out>
- reverse_copy(_Range&& __r, _Out __result)
- {
- return ranges::reverse_copy(ranges::begin(__r), ranges::end(__r),
- std::move(__result));
- }
+ template<typename _Range, copy_constructible _Fp>
+ requires invocable<_Fp&> && output_range<_Range, invoke_result_t<_Fp&>>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Fp __gen) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__gen));
+ }
+ };
- template<permutable _Iter, sentinel_for<_Iter> _Sent>
- constexpr subrange<_Iter>
- rotate(_Iter __first, _Iter __middle, _Sent __last)
- {
- auto __lasti = ranges::next(__first, __last);
- if (__first == __middle)
- return {__lasti, __lasti};
- if (__last == __middle)
- return {std::move(__first), std::move(__lasti)};
+ inline constexpr __generate_fn generate{};
- if constexpr (random_access_iterator<_Iter>)
- {
- auto __n = __lasti - __first;
- auto __k = __middle - __first;
+ struct __remove_if_fn
+ {
+ template<permutable _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ __first = ranges::find_if(__first, __last, __pred, __proj);
+ if (__first == __last)
+ return {__first, __first};
- if (__k == __n - __k)
+ auto __result = __first;
+ ++__first;
+ for (; __first != __last; ++__first)
+ if (!(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
{
- ranges::swap_ranges(__first, __middle, __middle, __middle + __k);
- return {std::move(__middle), std::move(__lasti)};
+ *__result = std::move(*__first);
+ ++__result;
}
- auto __p = __first;
- auto __ret = __first + (__lasti - __middle);
-
- for (;;)
- {
- if (__k < __n - __k)
- {
- // TODO: is_pod is deprecated, but this condition is
- // consistent with the STL implementation.
- if constexpr (__is_pod(iter_value_t<_Iter>))
- if (__k == 1)
- {
- auto __t = std::move(*__p);
- ranges::move(__p + 1, __p + __n, __p);
- *(__p + __n - 1) = std::move(__t);
- return {std::move(__ret), std::move(__lasti)};
- }
- auto __q = __p + __k;
- for (decltype(__n) __i = 0; __i < __n - __k; ++ __i)
- {
- ranges::iter_swap(__p, __q);
- ++__p;
- ++__q;
- }
- __n %= __k;
- if (__n == 0)
- return {std::move(__ret), std::move(__lasti)};
- ranges::swap(__n, __k);
- __k = __n - __k;
- }
- else
- {
- __k = __n - __k;
- // TODO: is_pod is deprecated, but this condition is
- // consistent with the STL implementation.
- if constexpr (__is_pod(iter_value_t<_Iter>))
- if (__k == 1)
- {
- auto __t = std::move(*(__p + __n - 1));
- ranges::move_backward(__p, __p + __n - 1, __p + __n);
- *__p = std::move(__t);
- return {std::move(__ret), std::move(__lasti)};
- }
- auto __q = __p + __n;
- __p = __q - __k;
- for (decltype(__n) __i = 0; __i < __n - __k; ++ __i)
- {
- --__p;
- --__q;
- ranges::iter_swap(__p, __q);
- }
- __n %= __k;
- if (__n == 0)
- return {std::move(__ret), std::move(__lasti)};
- std::swap(__n, __k);
- }
- }
- }
- else if constexpr (bidirectional_iterator<_Iter>)
- {
- auto __tail = __lasti;
+ return {__result, __first};
+ }
- ranges::reverse(__first, __middle);
- ranges::reverse(__middle, __tail);
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires permutable<iterator_t<_Range>>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
- while (__first != __middle && __middle != __tail)
- {
- ranges::iter_swap(__first, --__tail);
- ++__first;
- }
+ inline constexpr __remove_if_fn remove_if{};
- if (__first == __middle)
- {
- ranges::reverse(__middle, __tail);
- return {std::move(__tail), std::move(__lasti)};
- }
- else
+ struct __remove_fn
+ {
+ template<permutable _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity>
+ requires indirect_binary_predicate<ranges::equal_to,
+ projected<_Iter, _Proj>,
+ const _Tp*>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Sent __last, const _Tp& __value, _Proj __proj = {}) const
+ {
+ auto __pred = [&] (auto&& __arg) {
+ return std::forward<decltype(__arg)>(__arg) == __value;
+ };
+ return ranges::remove_if(__first, __last,
+ std::move(__pred), std::move(__proj));
+ }
+
+ template<forward_range _Range, typename _Tp, typename _Proj = identity>
+ requires permutable<iterator_t<_Range>>
+ && indirect_binary_predicate<ranges::equal_to,
+ projected<iterator_t<_Range>, _Proj>,
+ const _Tp*>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, const _Tp& __value, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ __value, std::move(__proj));
+ }
+ };
+
+ inline constexpr __remove_fn remove{};
+
+ template<typename _Iter, typename _Out>
+ using remove_copy_if_result = copy_result<_Iter, _Out>;
+
+ struct __remove_copy_if_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out, typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ requires indirectly_copyable<_Iter, _Out>
+ constexpr remove_copy_if_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result,
+ _Pred __pred, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (!(bool)std::__invoke(__pred, std::__invoke(__proj, *__first)))
{
- ranges::reverse(__first, __middle);
- return {std::move(__first), std::move(__lasti)};
+ *__result = *__first;
+ ++__result;
}
- }
- else
- {
- auto __first2 = __middle;
- do
- {
- ranges::iter_swap(__first, __first2);
- ++__first;
- ++__first2;
- if (__first == __middle)
- __middle = __first2;
- } while (__first2 != __last);
+ return {std::move(__first), std::move(__result)};
+ }
- auto __ret = __first;
+ template<input_range _Range, weakly_incrementable _Out,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ constexpr remove_copy_if_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result,
+ _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result),
+ std::move(__pred), std::move(__proj));
+ }
+ };
- __first2 = __middle;
+ inline constexpr __remove_copy_if_fn remove_copy_if{};
- while (__first2 != __last)
+ template<typename _Iter, typename _Out>
+ using remove_copy_result = copy_result<_Iter, _Out>;
+
+ struct __remove_copy_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out, typename _Tp, typename _Proj = identity>
+ requires indirectly_copyable<_Iter, _Out>
+ && indirect_binary_predicate<ranges::equal_to,
+ projected<_Iter, _Proj>,
+ const _Tp*>
+ constexpr remove_copy_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result,
+ const _Tp& __value, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (!(std::__invoke(__proj, *__first) == __value))
{
- ranges::iter_swap(__first, __first2);
- ++__first;
- ++__first2;
- if (__first == __middle)
- __middle = __first2;
- else if (__first2 == __last)
- __first2 = __middle;
+ *__result = *__first;
+ ++__result;
}
- return {std::move(__ret), std::move(__lasti)};
- }
- }
+ return {std::move(__first), std::move(__result)};
+ }
- template<forward_range _Range>
- requires permutable<iterator_t<_Range>>
- constexpr safe_subrange_t<_Range>
- rotate(_Range&& __r, iterator_t<_Range> __middle)
- {
- return ranges::rotate(ranges::begin(__r),
- std::move(__middle),
- ranges::end(__r));
- }
+ template<input_range _Range, weakly_incrementable _Out,
+ typename _Tp, typename _Proj = identity>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ && indirect_binary_predicate<ranges::equal_to,
+ projected<iterator_t<_Range>, _Proj>,
+ const _Tp*>
+ constexpr remove_copy_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result,
+ const _Tp& __value, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result), __value,
+ std::move(__proj));
+ }
+ };
- template<typename _Iter, typename _Out>
- using rotate_copy_result = copy_result<_Iter, _Out>;
+ inline constexpr __remove_copy_fn remove_copy{};
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out>
- requires indirectly_copyable<_Iter, _Out>
- constexpr rotate_copy_result<_Iter, _Out>
- rotate_copy(_Iter __first, _Iter __middle, _Sent __last, _Out __result)
- {
- auto __copy1 = ranges::copy(__middle,
- std::move(__last),
- std::move(__result));
- auto __copy2 = ranges::copy(std::move(__first),
- std::move(__middle),
- std::move(__copy1.out));
- return { std::move(__copy1.in), std::move(__copy2.out) };
- }
-
- template<forward_range _Range, weakly_incrementable _Out>
- requires indirectly_copyable<iterator_t<_Range>, _Out>
- constexpr rotate_copy_result<safe_iterator_t<_Range>, _Out>
- rotate_copy(_Range&& __r, iterator_t<_Range> __middle, _Out __result)
- {
- return ranges::rotate_copy(ranges::begin(__r),
- std::move(__middle),
- ranges::end(__r),
- std::move(__result));
- }
+ struct __unique_fn
+ {
+ template<permutable _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_equivalence_relation<
+ projected<_Iter, _Proj>> _Comp = ranges::equal_to>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ __first = ranges::adjacent_find(__first, __last, __comp, __proj);
+ if (__first == __last)
+ return {__first, __first};
-#ifdef _GLIBCXX_USE_C99_STDINT_TR1
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Gen>
- requires permutable<_Iter>
- && uniform_random_bit_generator<remove_reference_t<_Gen>>
- _Iter
- shuffle(_Iter __first, _Sent __last, _Gen&& __g)
- {
- auto __lasti = ranges::next(__first, __last);
- std::shuffle(std::move(__first), __lasti, std::forward<_Gen>(__g));
- return __lasti;
- }
-
- template<random_access_range _Range, typename _Gen>
- requires permutable<iterator_t<_Range>>
- && uniform_random_bit_generator<remove_reference_t<_Gen>>
- safe_iterator_t<_Range>
- shuffle(_Range&& __r, _Gen&& __g)
- {
- return ranges::shuffle(ranges::begin(__r), ranges::end(__r),
- std::forward<_Gen>(__g));
- }
-#endif
+ auto __dest = __first;
+ ++__first;
+ while (++__first != __last)
+ if (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *__dest),
+ std::__invoke(__proj, *__first)))
+ *++__dest = std::move(*__first);
+ return {++__dest, __first};
+ }
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- push_heap(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::push_heap(__first, __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- push_heap(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::push_heap(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_equivalence_relation<
+ projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to>
+ requires permutable<iterator_t<_Range>>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- pop_heap(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::pop_heap(__first, __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- pop_heap(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::pop_heap(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ inline constexpr __unique_fn unique{};
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- make_heap(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::make_heap(__first, __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- make_heap(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::make_heap(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ template<typename _Iter, typename _Out>
+ using unique_copy_result = copy_result<_Iter, _Out>;
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- sort_heap(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::sort_heap(__first, __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- sort_heap(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::sort_heap(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr _Iter
- is_heap_until(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- iter_difference_t<_Iter> __n = ranges::distance(__first, __last);
- iter_difference_t<_Iter> __parent = 0, __child = 1;
- for (; __child < __n; ++__child)
- if (std::__invoke(__comp,
- std::__invoke(__proj, *(__first + __parent)),
- std::__invoke(__proj, *(__first + __child))))
- return __first + __child;
- else if ((__child & 1) == 0)
- ++__parent;
-
- return __first + __n;
- }
-
- template<random_access_range _Range,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_iterator_t<_Range>
- is_heap_until(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::is_heap_until(ranges::begin(__r), ranges::end(__r),
+ struct __unique_copy_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out, typename _Proj = identity,
+ indirect_equivalence_relation<
+ projected<_Iter, _Proj>> _Comp = ranges::equal_to>
+ requires indirectly_copyable<_Iter, _Out>
+ && (forward_iterator<_Iter>
+ || (input_iterator<_Out>
+ && same_as<iter_value_t<_Iter>, iter_value_t<_Out>>)
+ || indirectly_copyable_storable<_Iter, _Out>)
+ constexpr unique_copy_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return {std::move(__first), std::move(__result)};
+
+ // TODO: perform a closer comparison with reference implementations
+ if constexpr (forward_iterator<_Iter>)
+ {
+ auto __next = __first;
+ *__result = *__next;
+ while (++__next != __last)
+ if (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *__first),
+ std::__invoke(__proj, *__next)))
+ {
+ __first = __next;
+ *++__result = *__first;
+ }
+ return {__next, std::move(++__result)};
+ }
+ else if constexpr (input_iterator<_Out>
+ && same_as<iter_value_t<_Iter>, iter_value_t<_Out>>)
+ {
+ *__result = *__first;
+ while (++__first != __last)
+ if (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *__result),
+ std::__invoke(__proj, *__first)))
+ *++__result = *__first;
+ return {std::move(__first), std::move(++__result)};
+ }
+ else // indirectly_copyable_storable<_Iter, _Out>
+ {
+ auto __value = *__first;
+ *__result = __value;
+ while (++__first != __last)
+ {
+ if (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *__first),
+ std::__invoke(__proj, __value)))
+ {
+ __value = *__first;
+ *++__result = __value;
+ }
+ }
+ return {std::move(__first), std::move(++__result)};
+ }
+ }
+
+ template<input_range _Range,
+ weakly_incrementable _Out, typename _Proj = identity,
+ indirect_equivalence_relation<
+ projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ && (forward_iterator<iterator_t<_Range>>
+ || (input_iterator<_Out>
+ && same_as<range_value_t<_Range>, iter_value_t<_Out>>)
+ || indirectly_copyable_storable<iterator_t<_Range>, _Out>)
+ constexpr unique_copy_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result),
std::move(__comp), std::move(__proj));
- }
-
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr bool
- is_heap(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- return (__last
- == ranges::is_heap_until(__first, __last,
- std::move(__comp),
- std::move(__proj)));
- }
-
- template<random_access_range _Range,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr bool
- is_heap(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::is_heap(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- sort(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::sort(std::move(__first), __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- sort(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::sort(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- _Iter
- stable_sort(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::stable_sort(std::move(__first), __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- safe_iterator_t<_Range>
- stable_sort(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::stable_sort(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- partial_sort(_Iter __first, _Iter __middle, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __middle)
- return ranges::next(__first, __last);
-
- ranges::make_heap(__first, __middle, __comp, __proj);
- auto __i = __middle;
- for (; __i != __last; ++__i)
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__i),
- std::__invoke(__proj, *__first)))
+ }
+ };
+
+ inline constexpr __unique_copy_fn unique_copy{};
+
+ struct __reverse_fn
+ {
+ template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent>
+ requires permutable<_Iter>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last) const
+ {
+ auto __i = ranges::next(__first, __last);
+ auto __tail = __i;
+
+ if constexpr (random_access_iterator<_Iter>)
{
- ranges::pop_heap(__first, __middle, __comp, __proj);
- ranges::iter_swap(__middle-1, __i);
- ranges::push_heap(__first, __middle, __comp, __proj);
+ if (__first != __last)
+ {
+ --__tail;
+ while (__first < __tail)
+ {
+ ranges::iter_swap(__first, __tail);
+ ++__first;
+ --__tail;
+ }
+ }
+ return __i;
}
- ranges::sort_heap(__first, __middle, __comp, __proj);
+ else
+ {
+ for (;;)
+ if (__first == __tail || __first == --__tail)
+ break;
+ else
+ {
+ ranges::iter_swap(__first, __tail);
+ ++__first;
+ }
+ return __i;
+ }
+ }
- return __i;
- }
+ template<bidirectional_range _Range>
+ requires permutable<iterator_t<_Range>>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r));
+ }
+ };
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- partial_sort(_Range&& __r, iterator_t<_Range> __middle,
- _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::partial_sort(ranges::begin(__r),
- std::move(__middle),
- ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ inline constexpr __reverse_fn reverse{};
template<typename _Iter, typename _Out>
- using partial_sort_copy_result = copy_result<_Iter, _Out>;
+ using reverse_copy_result = copy_result<_Iter, _Out>;
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- random_access_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_copyable<_Iter1, _Iter2>
- && sortable<_Iter2, _Comp, _Proj2>
- && indirect_strict_weak_order<_Comp,
- projected<_Iter1, _Proj1>,
- projected<_Iter2, _Proj2>>
- constexpr partial_sort_copy_result<_Iter1, _Iter2>
- partial_sort_copy(_Iter1 __first, _Sent1 __last,
- _Iter2 __result_first, _Sent2 __result_last,
- _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- if (__result_first == __result_last)
- {
- // TODO: Eliminating the variable __lasti triggers an ICE.
- auto __lasti = ranges::next(std::move(__first),
- std::move(__last));
- return {std::move(__lasti), std::move(__result_first)};
- }
+ struct __reverse_copy_fn
+ {
+ template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out>
+ requires indirectly_copyable<_Iter, _Out>
+ constexpr reverse_copy_result<_Iter, _Out>
+ operator()(_Iter __first, _Sent __last, _Out __result) const
+ {
+ auto __i = ranges::next(__first, __last);
+ auto __tail = __i;
+ while (__first != __tail)
+ {
+ --__tail;
+ *__result = *__tail;
+ ++__result;
+ }
+ return {__i, __result};
+ }
- auto __result_real_last = __result_first;
- while (__first != __last && __result_real_last != __result_last)
- {
- *__result_real_last = *__first;
- ++__result_real_last;
- ++__first;
- }
+ template<bidirectional_range _Range, weakly_incrementable _Out>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ constexpr reverse_copy_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, _Out __result) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__result));
+ }
+ };
+
+ inline constexpr __reverse_copy_fn reverse_copy{};
+
+ struct __rotate_fn
+ {
+ template<permutable _Iter, sentinel_for<_Iter> _Sent>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Iter __middle, _Sent __last) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ if (__first == __middle)
+ return {__lasti, __lasti};
+ if (__last == __middle)
+ return {std::move(__first), std::move(__lasti)};
+
+ if constexpr (random_access_iterator<_Iter>)
+ {
+ auto __n = __lasti - __first;
+ auto __k = __middle - __first;
+
+ if (__k == __n - __k)
+ {
+ ranges::swap_ranges(__first, __middle, __middle, __middle + __k);
+ return {std::move(__middle), std::move(__lasti)};
+ }
+
+ auto __p = __first;
+ auto __ret = __first + (__lasti - __middle);
+
+ for (;;)
+ {
+ if (__k < __n - __k)
+ {
+ // TODO: is_pod is deprecated, but this condition is
+ // consistent with the STL implementation.
+ if constexpr (__is_pod(iter_value_t<_Iter>))
+ if (__k == 1)
+ {
+ auto __t = std::move(*__p);
+ ranges::move(__p + 1, __p + __n, __p);
+ *(__p + __n - 1) = std::move(__t);
+ return {std::move(__ret), std::move(__lasti)};
+ }
+ auto __q = __p + __k;
+ for (decltype(__n) __i = 0; __i < __n - __k; ++ __i)
+ {
+ ranges::iter_swap(__p, __q);
+ ++__p;
+ ++__q;
+ }
+ __n %= __k;
+ if (__n == 0)
+ return {std::move(__ret), std::move(__lasti)};
+ ranges::swap(__n, __k);
+ __k = __n - __k;
+ }
+ else
+ {
+ __k = __n - __k;
+ // TODO: is_pod is deprecated, but this condition is
+ // consistent with the STL implementation.
+ if constexpr (__is_pod(iter_value_t<_Iter>))
+ if (__k == 1)
+ {
+ auto __t = std::move(*(__p + __n - 1));
+ ranges::move_backward(__p, __p + __n - 1, __p + __n);
+ *__p = std::move(__t);
+ return {std::move(__ret), std::move(__lasti)};
+ }
+ auto __q = __p + __n;
+ __p = __q - __k;
+ for (decltype(__n) __i = 0; __i < __n - __k; ++ __i)
+ {
+ --__p;
+ --__q;
+ ranges::iter_swap(__p, __q);
+ }
+ __n %= __k;
+ if (__n == 0)
+ return {std::move(__ret), std::move(__lasti)};
+ std::swap(__n, __k);
+ }
+ }
+ }
+ else if constexpr (bidirectional_iterator<_Iter>)
+ {
+ auto __tail = __lasti;
- ranges::make_heap(__result_first, __result_real_last, __comp, __proj2);
- for (; __first != __last; ++__first)
- if (std::__invoke(__comp,
- std::__invoke(__proj1, *__first),
- std::__invoke(__proj2, *__result_first)))
+ ranges::reverse(__first, __middle);
+ ranges::reverse(__middle, __tail);
+
+ while (__first != __middle && __middle != __tail)
+ {
+ ranges::iter_swap(__first, --__tail);
+ ++__first;
+ }
+
+ if (__first == __middle)
+ {
+ ranges::reverse(__middle, __tail);
+ return {std::move(__tail), std::move(__lasti)};
+ }
+ else
+ {
+ ranges::reverse(__first, __middle);
+ return {std::move(__first), std::move(__lasti)};
+ }
+ }
+ else
{
- ranges::pop_heap(__result_first, __result_real_last,
- __comp, __proj2);
- *(__result_real_last-1) = *__first;
- ranges::push_heap(__result_first, __result_real_last,
- __comp, __proj2);
+ auto __first2 = __middle;
+ do
+ {
+ ranges::iter_swap(__first, __first2);
+ ++__first;
+ ++__first2;
+ if (__first == __middle)
+ __middle = __first2;
+ } while (__first2 != __last);
+
+ auto __ret = __first;
+
+ __first2 = __middle;
+
+ while (__first2 != __last)
+ {
+ ranges::iter_swap(__first, __first2);
+ ++__first;
+ ++__first2;
+ if (__first == __middle)
+ __middle = __first2;
+ else if (__first2 == __last)
+ __first2 = __middle;
+ }
+ return {std::move(__ret), std::move(__lasti)};
}
- ranges::sort_heap(__result_first, __result_real_last, __comp, __proj2);
-
- return {std::move(__first), std::move(__result_real_last)};
- }
-
- template<input_range _Range1, random_access_range _Range2,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires indirectly_copyable<iterator_t<_Range1>, iterator_t<_Range2>>
- && sortable<iterator_t<_Range2>, _Comp, _Proj2>
- && indirect_strict_weak_order<_Comp,
- projected<iterator_t<_Range1>, _Proj1>,
- projected<iterator_t<_Range2>, _Proj2>>
- constexpr partial_sort_copy_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>>
- partial_sort_copy(_Range1&& __r, _Range2&& __out, _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::partial_sort_copy(ranges::begin(__r), ranges::end(__r),
- ranges::begin(__out), ranges::end(__out),
- std::move(__comp),
- std::move(__proj1), std::move(__proj2));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr _Iter
- is_sorted_until(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
- return __first;
+ }
- auto __next = __first;
- for (++__next; __next != __last; __first = __next, (void)++__next)
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__next),
- std::__invoke(__proj, *__first)))
- return __next;
- return __next;
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_iterator_t<_Range>
- is_sorted_until(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::is_sorted_until(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr bool
- is_sorted(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
- return true;
+ template<forward_range _Range>
+ requires permutable<iterator_t<_Range>>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, iterator_t<_Range> __middle) const
+ {
+ return (*this)(ranges::begin(__r),
+ std::move(__middle),
+ ranges::end(__r));
+ }
+ };
- auto __next = __first;
- for (++__next; __next != __last; __first = __next, (void)++__next)
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__next),
- std::__invoke(__proj, *__first)))
- return false;
- return true;
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr bool
- is_sorted(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::is_sorted(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr _Iter
- nth_element(_Iter __first, _Iter __nth, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::nth_element(std::move(__first), std::move(__nth), __lasti,
+ inline constexpr __rotate_fn rotate{};
+
+ template<typename _Iter, typename _Out>
+ using rotate_copy_result = copy_result<_Iter, _Out>;
+
+ struct __rotate_copy_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out>
+ requires indirectly_copyable<_Iter, _Out>
+ constexpr rotate_copy_result<_Iter, _Out>
+ operator()(_Iter __first, _Iter __middle, _Sent __last, _Out __result) const
+ {
+ auto __copy1 = ranges::copy(__middle,
+ std::move(__last),
+ std::move(__result));
+ auto __copy2 = ranges::copy(std::move(__first),
+ std::move(__middle),
+ std::move(__copy1.out));
+ return { std::move(__copy1.in), std::move(__copy2.out) };
+ }
+
+ template<forward_range _Range, weakly_incrementable _Out>
+ requires indirectly_copyable<iterator_t<_Range>, _Out>
+ constexpr rotate_copy_result<safe_iterator_t<_Range>, _Out>
+ operator()(_Range&& __r, iterator_t<_Range> __middle, _Out __result) const
+ {
+ return (*this)(ranges::begin(__r),
+ std::move(__middle),
+ ranges::end(__r),
+ std::move(__result));
+ }
+ };
+
+ inline constexpr __rotate_copy_fn rotate_copy{};
+
+#ifdef _GLIBCXX_USE_C99_STDINT_TR1
+ struct __shuffle_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Gen>
+ requires permutable<_Iter>
+ && uniform_random_bit_generator<remove_reference_t<_Gen>>
+ _Iter
+ operator()(_Iter __first, _Sent __last, _Gen&& __g) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::shuffle(std::move(__first), __lasti, std::forward<_Gen>(__g));
+ return __lasti;
+ }
+
+ template<random_access_range _Range, typename _Gen>
+ requires permutable<iterator_t<_Range>>
+ && uniform_random_bit_generator<remove_reference_t<_Gen>>
+ safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Gen&& __g) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::forward<_Gen>(__g));
+ }
+ };
+
+ inline constexpr __shuffle_fn shuffle{};
+#endif
+
+ struct __push_heap_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::push_heap(__first, __lasti,
__detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<random_access_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr safe_iterator_t<_Range>
- nth_element(_Range&& __r, iterator_t<_Range> __nth,
- _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::nth_element(ranges::begin(__r), std::move(__nth),
- ranges::end(__r),
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr _Iter
- lower_bound(_Iter __first, _Sent __last,
- const _Tp& __value, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __len = ranges::distance(__first, __last);
+ }
+ };
- while (__len > 0)
- {
- auto __half = __len / 2;
- auto __middle = __first;
- ranges::advance(__middle, __half);
- if (std::__invoke(__comp, std::__invoke(__proj, *__middle), __value))
- {
- __first = __middle;
- ++__first;
- __len = __len - __half - 1;
- }
- else
- __len = __half;
- }
- return __first;
- }
-
- template<forward_range _Range, typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*,
- projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_iterator_t<_Range>
- lower_bound(_Range&& __r,
- const _Tp& __value, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::lower_bound(ranges::begin(__r), ranges::end(__r),
- __value,
+ inline constexpr __push_heap_fn push_heap{};
+
+ struct __pop_heap_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::pop_heap(__first, __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr _Iter
- upper_bound(_Iter __first, _Sent __last,
- const _Tp& __value, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __len = ranges::distance(__first, __last);
+ }
+ };
- while (__len > 0)
- {
- auto __half = __len / 2;
- auto __middle = __first;
- ranges::advance(__middle, __half);
- if (std::__invoke(__comp, __value, std::__invoke(__proj, *__middle)))
- __len = __half;
- else
- {
- __first = __middle;
- ++__first;
- __len = __len - __half - 1;
- }
- }
- return __first;
- }
-
- template<forward_range _Range, typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*,
- projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_iterator_t<_Range>
- upper_bound(_Range&& __r,
- const _Tp& __value, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::upper_bound(ranges::begin(__r), ranges::end(__r),
- __value,
+ inline constexpr __pop_heap_fn pop_heap{};
+
+ struct __make_heap_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::make_heap(__first, __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr subrange<_Iter>
- equal_range(_Iter __first, _Sent __last,
- const _Tp& __value, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __len = ranges::distance(__first, __last);
+ }
+ };
- while (__len > 0)
- {
- auto __half = __len / 2;
- auto __middle = __first;
- ranges::advance(__middle, __half);
+ inline constexpr __make_heap_fn make_heap{};
+
+ struct __sort_heap_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::sort_heap(__first, __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __sort_heap_fn sort_heap{};
+
+ struct __is_heap_until_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ iter_difference_t<_Iter> __n = ranges::distance(__first, __last);
+ iter_difference_t<_Iter> __parent = 0, __child = 1;
+ for (; __child < __n; ++__child)
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *(__first + __parent)),
+ std::__invoke(__proj, *(__first + __child))))
+ return __first + __child;
+ else if ((__child & 1) == 0)
+ ++__parent;
+
+ return __first + __n;
+ }
+
+ template<random_access_range _Range,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __is_heap_until_fn is_heap_until{};
+
+ struct __is_heap_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (__last
+ == ranges::is_heap_until(__first, __last,
+ std::move(__comp),
+ std::move(__proj)));
+ }
+
+ template<random_access_range _Range,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __is_heap_fn is_heap{};
+
+ struct __sort_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::sort(std::move(__first), __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __sort_fn sort{};
+
+ struct __stable_sort_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::stable_sort(std::move(__first), __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __stable_sort_fn stable_sort{};
+
+ struct __partial_sort_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Iter __middle, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __middle)
+ return ranges::next(__first, __last);
+
+ ranges::make_heap(__first, __middle, __comp, __proj);
+ auto __i = __middle;
+ for (; __i != __last; ++__i)
if (std::__invoke(__comp,
- std::__invoke(__proj, *__middle),
- __value))
+ std::__invoke(__proj, *__i),
+ std::__invoke(__proj, *__first)))
{
- __first = __middle;
- ++__first;
- __len = __len - __half - 1;
+ ranges::pop_heap(__first, __middle, __comp, __proj);
+ ranges::iter_swap(__middle-1, __i);
+ ranges::push_heap(__first, __middle, __comp, __proj);
}
- else if (std::__invoke(__comp,
- __value,
- std::__invoke(__proj, *__middle)))
- __len = __half;
- else
+ ranges::sort_heap(__first, __middle, __comp, __proj);
+
+ return __i;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, iterator_t<_Range> __middle,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r),
+ std::move(__middle),
+ ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __partial_sort_fn partial_sort{};
+
+ template<typename _Iter, typename _Out>
+ using partial_sort_copy_result = copy_result<_Iter, _Out>;
+
+ struct __partial_sort_copy_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ random_access_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_copyable<_Iter1, _Iter2>
+ && sortable<_Iter2, _Comp, _Proj2>
+ && indirect_strict_weak_order<_Comp,
+ projected<_Iter1, _Proj1>,
+ projected<_Iter2, _Proj2>>
+ constexpr partial_sort_copy_result<_Iter1, _Iter2>
+ operator()(_Iter1 __first, _Sent1 __last,
+ _Iter2 __result_first, _Sent2 __result_last,
+ _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ if (__result_first == __result_last)
+ {
+ // TODO: Eliminating the variable __lasti triggers an ICE.
+ auto __lasti = ranges::next(std::move(__first),
+ std::move(__last));
+ return {std::move(__lasti), std::move(__result_first)};
+ }
+
+ auto __result_real_last = __result_first;
+ while (__first != __last && __result_real_last != __result_last)
+ {
+ *__result_real_last = *__first;
+ ++__result_real_last;
+ ++__first;
+ }
+
+ ranges::make_heap(__result_first, __result_real_last, __comp, __proj2);
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__comp,
+ std::__invoke(__proj1, *__first),
+ std::__invoke(__proj2, *__result_first)))
{
- auto __left
- = ranges::lower_bound(__first, __middle,
- __value, __comp, __proj);
- ranges::advance(__first, __len);
- auto __right
- = ranges::upper_bound(++__middle, __first,
- __value, __comp, __proj);
- return {__left, __right};
+ ranges::pop_heap(__result_first, __result_real_last,
+ __comp, __proj2);
+ *(__result_real_last-1) = *__first;
+ ranges::push_heap(__result_first, __result_real_last,
+ __comp, __proj2);
}
- }
- return {__first, __first};
- }
-
- template<forward_range _Range,
- typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*,
- projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_subrange_t<_Range>
- equal_range(_Range&& __r, const _Tp& __value,
- _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::equal_range(ranges::begin(__r), ranges::end(__r),
- __value,
+ ranges::sort_heap(__result_first, __result_real_last, __comp, __proj2);
+
+ return {std::move(__first), std::move(__result_real_last)};
+ }
+
+ template<input_range _Range1, random_access_range _Range2,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires indirectly_copyable<iterator_t<_Range1>, iterator_t<_Range2>>
+ && sortable<iterator_t<_Range2>, _Comp, _Proj2>
+ && indirect_strict_weak_order<_Comp,
+ projected<iterator_t<_Range1>, _Proj1>,
+ projected<iterator_t<_Range2>, _Proj2>>
+ constexpr partial_sort_copy_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>>
+ operator()(_Range1&& __r, _Range2&& __out, _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ ranges::begin(__out), ranges::end(__out),
+ std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __partial_sort_copy_fn partial_sort_copy{};
+
+ struct __is_sorted_until_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return __first;
+
+ auto __next = __first;
+ for (++__next; __next != __last; __first = __next, (void)++__next)
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__next),
+ std::__invoke(__proj, *__first)))
+ return __next;
+ return __next;
+ }
+
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __is_sorted_until_fn is_sorted_until{};
+
+ struct __is_sorted_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return true;
+
+ auto __next = __first;
+ for (++__next; __next != __last; __first = __next, (void)++__next)
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__next),
+ std::__invoke(__proj, *__first)))
+ return false;
+ return true;
+ }
+
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr bool
- binary_search(_Iter __first, _Sent __last,
- const _Tp& __value, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __i = ranges::lower_bound(__first, __last, __value, __comp, __proj);
- if (__i == __last)
- return false;
- return !(bool)std::__invoke(__comp, __value, std::__invoke(__proj, *__i));
- }
-
- template<forward_range _Range,
- typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<const _Tp*,
- projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr bool
- binary_search(_Range&& __r, const _Tp& __value, _Comp __comp = {},
- _Proj __proj = {})
- {
- return ranges::binary_search(ranges::begin(__r), ranges::end(__r),
+ }
+ };
+
+ inline constexpr __is_sorted_fn is_sorted{};
+
+ struct __nth_element_fn
+ {
+ template<random_access_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr _Iter
+ operator()(_Iter __first, _Iter __nth, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::nth_element(std::move(__first), std::move(__nth), __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
+
+ template<random_access_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, iterator_t<_Range> __nth,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), std::move(__nth),
+ ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __nth_element_fn nth_element{};
+
+ struct __lower_bound_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __len = ranges::distance(__first, __last);
+
+ while (__len > 0)
+ {
+ auto __half = __len / 2;
+ auto __middle = __first;
+ ranges::advance(__middle, __half);
+ if (std::__invoke(__comp, std::__invoke(__proj, *__middle), __value))
+ {
+ __first = __middle;
+ ++__first;
+ __len = __len - __half - 1;
+ }
+ else
+ __len = __half;
+ }
+ return __first;
+ }
+
+ template<forward_range _Range, typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*,
+ projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r,
+ const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ __value,
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __lower_bound_fn lower_bound{};
+
+ struct __upper_bound_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __len = ranges::distance(__first, __last);
+
+ while (__len > 0)
+ {
+ auto __half = __len / 2;
+ auto __middle = __first;
+ ranges::advance(__middle, __half);
+ if (std::__invoke(__comp, __value, std::__invoke(__proj, *__middle)))
+ __len = __half;
+ else
+ {
+ __first = __middle;
+ ++__first;
+ __len = __len - __half - 1;
+ }
+ }
+ return __first;
+ }
+
+ template<forward_range _Range, typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*,
+ projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r,
+ const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
__value,
std::move(__comp), std::move(__proj));
- }
+ }
+ };
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr bool
- is_partitioned(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- __first = ranges::find_if_not(std::move(__first), __last, __pred, __proj);
- if (__first == __last)
- return true;
- ++__first;
- return ranges::none_of(std::move(__first), std::move(__last),
- std::move(__pred), std::move(__proj));
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- constexpr bool
- is_partitioned(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::is_partitioned(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
-
- template<permutable _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr subrange<_Iter>
- partition(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- if constexpr (bidirectional_iterator<_Iter>)
- {
- auto __lasti = ranges::next(__first, __last);
- auto __tail = __lasti;
- for (;;)
- {
- for (;;)
- if (__first == __tail)
- return {std::move(__first), std::move(__lasti)};
- else if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- ++__first;
- else
- break;
- --__tail;
- for (;;)
- if (__first == __tail)
- return {std::move(__first), std::move(__lasti)};
- else if (!(bool)std::__invoke(__pred,
- std::__invoke(__proj, *__tail)))
- --__tail;
- else
- break;
- ranges::iter_swap(__first, __tail);
- ++__first;
- }
- }
- else
- {
- if (__first == __last)
- return {std::move(__first), std::move(__first)};
+ inline constexpr __upper_bound_fn upper_bound{};
- while (std::__invoke(__pred, std::__invoke(__proj, *__first)))
- if (++__first == __last)
- return {std::move(__first), std::move(__first)};
+ struct __equal_range_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Sent __last,
+ const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __len = ranges::distance(__first, __last);
- auto __next = __first;
- while (++__next != __last)
- if (std::__invoke(__pred, std::__invoke(__proj, *__next)))
+ while (__len > 0)
+ {
+ auto __half = __len / 2;
+ auto __middle = __first;
+ ranges::advance(__middle, __half);
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__middle),
+ __value))
{
- ranges::iter_swap(__first, __next);
+ __first = __middle;
++__first;
+ __len = __len - __half - 1;
+ }
+ else if (std::__invoke(__comp,
+ __value,
+ std::__invoke(__proj, *__middle)))
+ __len = __half;
+ else
+ {
+ auto __left
+ = ranges::lower_bound(__first, __middle,
+ __value, __comp, __proj);
+ ranges::advance(__first, __len);
+ auto __right
+ = ranges::upper_bound(++__middle, __first,
+ __value, __comp, __proj);
+ return {__left, __right};
}
+ }
+ return {__first, __first};
+ }
- return {std::move(__first), std::move(__next)};
- }
- }
+ template<forward_range _Range,
+ typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*,
+ projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, const _Tp& __value,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ __value,
+ std::move(__comp), std::move(__proj));
+ }
+ };
- template<forward_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires permutable<iterator_t<_Range>>
- constexpr safe_subrange_t<_Range>
- partition(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::partition(ranges::begin(__r), ranges::end(__r),
+ inline constexpr __equal_range_fn equal_range{};
+
+ struct __binary_search_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last,
+ const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __i = ranges::lower_bound(__first, __last, __value, __comp, __proj);
+ if (__i == __last)
+ return false;
+ return !(bool)std::__invoke(__comp, __value, std::__invoke(__proj, *__i));
+ }
+
+ template<forward_range _Range,
+ typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<const _Tp*,
+ projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Range&& __r, const _Tp& __value, _Comp __comp = {},
+ _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ __value,
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __binary_search_fn binary_search{};
+
+ struct __is_partitioned_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ __first = ranges::find_if_not(std::move(__first), __last, __pred, __proj);
+ if (__first == __last)
+ return true;
+ ++__first;
+ return ranges::none_of(std::move(__first), std::move(__last),
std::move(__pred), std::move(__proj));
- }
-
- template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- requires permutable<_Iter>
- subrange<_Iter>
- stable_partition(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- auto __middle
- = std::stable_partition(std::move(__first), __lasti,
- __detail::__make_pred_proj(__pred, __proj));
- return {std::move(__middle), std::move(__lasti)};
- }
-
- template<bidirectional_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires permutable<iterator_t<_Range>>
- safe_subrange_t<_Range>
- stable_partition(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::stable_partition(ranges::begin(__r), ranges::end(__r),
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ constexpr bool
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
std::move(__pred), std::move(__proj));
- }
+ }
+ };
+
+ inline constexpr __is_partitioned_fn is_partitioned{};
+
+ struct __partition_fn
+ {
+ template<permutable _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr subrange<_Iter>
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ if constexpr (bidirectional_iterator<_Iter>)
+ {
+ auto __lasti = ranges::next(__first, __last);
+ auto __tail = __lasti;
+ for (;;)
+ {
+ for (;;)
+ if (__first == __tail)
+ return {std::move(__first), std::move(__lasti)};
+ else if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ ++__first;
+ else
+ break;
+ --__tail;
+ for (;;)
+ if (__first == __tail)
+ return {std::move(__first), std::move(__lasti)};
+ else if (!(bool)std::__invoke(__pred,
+ std::__invoke(__proj, *__tail)))
+ --__tail;
+ else
+ break;
+ ranges::iter_swap(__first, __tail);
+ ++__first;
+ }
+ }
+ else
+ {
+ if (__first == __last)
+ return {std::move(__first), std::move(__first)};
+
+ while (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ if (++__first == __last)
+ return {std::move(__first), std::move(__first)};
+
+ auto __next = __first;
+ while (++__next != __last)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__next)))
+ {
+ ranges::iter_swap(__first, __next);
+ ++__first;
+ }
+
+ return {std::move(__first), std::move(__next)};
+ }
+ }
+
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires permutable<iterator_t<_Range>>
+ constexpr safe_subrange_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __partition_fn partition{};
+
+ struct __stable_partition_fn
+ {
+ template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ requires permutable<_Iter>
+ subrange<_Iter>
+ operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ auto __middle
+ = std::stable_partition(std::move(__first), __lasti,
+ __detail::__make_pred_proj(__pred, __proj));
+ return {std::move(__middle), std::move(__lasti)};
+ }
+
+ template<bidirectional_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires permutable<iterator_t<_Range>>
+ safe_subrange_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __stable_partition_fn stable_partition{};
template<typename _Iter, typename _Out1, typename _O2>
struct partition_copy_result
{ return {std::move(in), std::move(out1), std::move(out2)}; }
};
- template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
- weakly_incrementable _Out1, weakly_incrementable _O2,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- requires indirectly_copyable<_Iter, _Out1>
- && indirectly_copyable<_Iter, _O2>
- constexpr partition_copy_result<_Iter, _Out1, _O2>
- partition_copy(_Iter __first, _Sent __last,
- _Out1 __out_true, _O2 __out_false,
- _Pred __pred, _Proj __proj = {})
- {
- for (; __first != __last; ++__first)
- if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ struct __partition_copy_fn
+ {
+ template<input_iterator _Iter, sentinel_for<_Iter> _Sent,
+ weakly_incrementable _Out1, weakly_incrementable _O2,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ requires indirectly_copyable<_Iter, _Out1>
+ && indirectly_copyable<_Iter, _O2>
+ constexpr partition_copy_result<_Iter, _Out1, _O2>
+ operator()(_Iter __first, _Sent __last,
+ _Out1 __out_true, _O2 __out_false,
+ _Pred __pred, _Proj __proj = {}) const
+ {
+ for (; __first != __last; ++__first)
+ if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
+ {
+ *__out_true = *__first;
+ ++__out_true;
+ }
+ else
+ {
+ *__out_false = *__first;
+ ++__out_false;
+ }
+
+ return {std::move(__first), std::move(__out_true), std::move(__out_false)};
+ }
+
+ template<input_range _Range, weakly_incrementable _Out1,
+ weakly_incrementable _O2,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ requires indirectly_copyable<iterator_t<_Range>, _Out1>
+ && indirectly_copyable<iterator_t<_Range>, _O2>
+ constexpr partition_copy_result<safe_iterator_t<_Range>, _Out1, _O2>
+ operator()(_Range&& __r, _Out1 out_true, _O2 out_false,
+ _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(out_true), std::move(out_false),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __partition_copy_fn partition_copy{};
+
+ struct __partition_point_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Pred __pred, _Proj __proj = {}) const
+ {
+ auto __len = ranges::distance(__first, __last);
+
+ while (__len > 0)
{
- *__out_true = *__first;
- ++__out_true;
+ auto __half = __len / 2;
+ auto __middle = __first;
+ ranges::advance(__middle, __half);
+ if (std::__invoke(__pred, std::__invoke(__proj, *__middle)))
+ {
+ __first = __middle;
+ ++__first;
+ __len = __len - __half - 1;
+ }
+ else
+ __len = __half;
}
- else
+ return __first;
+ }
+
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Pred __pred, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__pred), std::move(__proj));
+ }
+ };
+
+ inline constexpr __partition_point_fn partition_point{};
+
+ template<typename _Iter1, typename _Iter2, typename _Out>
+ using merge_result = binary_transform_result<_Iter1, _Iter2, _Out>;
+
+ struct __merge_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ weakly_incrementable _Out, typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
+ constexpr merge_result<_Iter1, _Iter2, _Out>
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2, _Out __result,
+ _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2)
{
- *__out_false = *__first;
- ++__out_false;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj2, *__first2),
+ std::__invoke(__proj1, *__first1)))
+ {
+ *__result = *__first2;
+ ++__first2;
+ }
+ else
+ {
+ *__result = *__first1;
+ ++__first1;
+ }
+ ++__result;
}
+ auto __copy1 = ranges::copy(std::move(__first1), std::move(__last1),
+ std::move(__result));
+ auto __copy2 = ranges::copy(std::move(__first2), std::move(__last2),
+ std::move(__copy1.out));
+ return { std::move(__copy1.in), std::move(__copy2.in),
+ std::move(__copy2.out) };
+ }
- return {std::move(__first), std::move(__out_true), std::move(__out_false)};
- }
-
- template<input_range _Range, weakly_incrementable _Out1,
- weakly_incrementable _O2,
- typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- requires indirectly_copyable<iterator_t<_Range>, _Out1>
- && indirectly_copyable<iterator_t<_Range>, _O2>
- constexpr partition_copy_result<safe_iterator_t<_Range>, _Out1, _O2>
- partition_copy(_Range&& __r, _Out1 out_true, _O2 out_false,
- _Pred __pred, _Proj __proj = {})
- {
- return ranges::partition_copy(ranges::begin(__r), ranges::end(__r),
- std::move(out_true), std::move(out_false),
- std::move(__pred), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
- constexpr _Iter
- partition_point(_Iter __first, _Sent __last,
- _Pred __pred, _Proj __proj = {})
- {
- auto __len = ranges::distance(__first, __last);
+ template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
+ _Comp, _Proj1, _Proj2>
+ constexpr merge_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>,
+ _Out>
+ operator()(_Range1&& __r1, _Range2&& __r2, _Out __result,
+ _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__result), std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
- while (__len > 0)
- {
- auto __half = __len / 2;
- auto __middle = __first;
- ranges::advance(__middle, __half);
- if (std::__invoke(__pred, std::__invoke(__proj, *__middle)))
- {
- __first = __middle;
- ++__first;
- __len = __len - __half - 1;
- }
- else
- __len = __half;
- }
- return __first;
- }
+ inline constexpr __merge_fn merge{};
- template<forward_range _Range, typename _Proj = identity,
- indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
- constexpr safe_iterator_t<_Range>
- partition_point(_Range&& __r, _Pred __pred, _Proj __proj = {})
- {
- return ranges::partition_point(ranges::begin(__r), ranges::end(__r),
- std::move(__pred), std::move(__proj));
- }
+ struct __inplace_merge_fn
+ {
+ template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less,
+ typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ _Iter
+ operator()(_Iter __first, _Iter __middle, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __lasti = ranges::next(__first, __last);
+ std::inplace_merge(std::move(__first), std::move(__middle), __lasti,
+ __detail::__make_comp_proj(__comp, __proj));
+ return __lasti;
+ }
- template<typename _Iter1, typename _Iter2, typename _Out>
- using merge_result = binary_transform_result<_Iter1, _Iter2, _Out>;
+ template<bidirectional_range _Range,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ safe_iterator_t<_Range>
+ operator()(_Range&& __r, iterator_t<_Range> __middle,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), std::move(__middle),
+ ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- weakly_incrementable _Out, typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
- constexpr merge_result<_Iter1, _Iter2, _Out>
- merge(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2, _Out __result,
- _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2)
- {
+ inline constexpr __inplace_merge_fn inplace_merge{};
+
+ struct __includes_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Proj1 = identity, typename _Proj2 = identity,
+ indirect_strict_weak_order<projected<_Iter1, _Proj1>,
+ projected<_Iter2, _Proj2>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
+ _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2)
if (std::__invoke(__comp,
std::__invoke(__proj2, *__first2),
std::__invoke(__proj1, *__first1)))
+ return false;
+ else if (std::__invoke(__comp,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ ++__first1;
+ else
{
- *__result = *__first2;
+ ++__first1;
++__first2;
}
+
+ return __first2 == __last2;
+ }
+
+ template<input_range _Range1, input_range _Range2, typename _Proj1 = identity,
+ typename _Proj2 = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range1>, _Proj1>,
+ projected<iterator_t<_Range2>, _Proj2>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Range1&& __r1, _Range2&& __r2, _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __includes_fn includes{};
+
+ template<typename _Iter1, typename _Iter2, typename _Out>
+ using set_union_result = binary_transform_result<_Iter1, _Iter2, _Out>;
+
+ struct __set_union_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ weakly_incrementable _Out, typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
+ constexpr set_union_result<_Iter1, _Iter2, _Out>
+ operator()(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
+ _Out __result, _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2)
+ {
+ if (std::__invoke(__comp,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ {
+ *__result = *__first1;
+ ++__first1;
+ }
+ else if (std::__invoke(__comp,
+ std::__invoke(__proj2, *__first2),
+ std::__invoke(__proj1, *__first1)))
+ {
+ *__result = *__first2;
+ ++__first2;
+ }
+ else
+ {
+ *__result = *__first1;
+ ++__first1;
+ ++__first2;
+ }
+ ++__result;
+ }
+ auto __copy1 = ranges::copy(std::move(__first1), std::move(__last1),
+ std::move(__result));
+ auto __copy2 = ranges::copy(std::move(__first2), std::move(__last2),
+ std::move(__copy1.out));
+ return {std::move(__copy1.in), std::move(__copy2.in),
+ std::move(__copy2.out)};
+ }
+
+ template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
+ _Comp, _Proj1, _Proj2>
+ constexpr set_union_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>, _Out>
+ operator()(_Range1&& __r1, _Range2&& __r2, _Out __result, _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__result), std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __set_union_fn set_union{};
+
+ template<typename _Iter1, typename _Iter2, typename _Out>
+ using set_intersection_result = binary_transform_result<_Iter1, _Iter2, _Out>;
+
+ struct __set_intersection_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ weakly_incrementable _Out, typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
+ constexpr set_intersection_result<_Iter1, _Iter2, _Out>
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2, _Out __result,
+ _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2)
+ if (std::__invoke(__comp,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ ++__first1;
+ else if (std::__invoke(__comp,
+ std::__invoke(__proj2, *__first2),
+ std::__invoke(__proj1, *__first1)))
+ ++__first2;
else
{
*__result = *__first1;
++__first1;
+ ++__first2;
+ ++__result;
}
- ++__result;
- }
- auto __copy1 = ranges::copy(std::move(__first1), std::move(__last1),
- std::move(__result));
- auto __copy2 = ranges::copy(std::move(__first2), std::move(__last2),
- std::move(__copy1.out));
- return { std::move(__copy1.in), std::move(__copy2.in),
- std::move(__copy2.out) };
- }
-
- template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
- _Comp, _Proj1, _Proj2>
- constexpr merge_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>,
- _Out>
- merge(_Range1&& __r1, _Range2&& __r2, _Out __result,
- _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::merge(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__result), std::move(__comp),
- std::move(__proj1), std::move(__proj2));
- }
-
- template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less,
- typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- _Iter
- inplace_merge(_Iter __first, _Iter __middle, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- auto __lasti = ranges::next(__first, __last);
- std::inplace_merge(std::move(__first), std::move(__middle), __lasti,
- __detail::__make_comp_proj(__comp, __proj));
- return __lasti;
- }
-
- template<bidirectional_range _Range,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- safe_iterator_t<_Range>
- inplace_merge(_Range&& __r, iterator_t<_Range> __middle,
- _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::inplace_merge(ranges::begin(__r), std::move(__middle),
- ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ // TODO: Eliminating these variables triggers an ICE.
+ auto __last1i = ranges::next(std::move(__first1), std::move(__last1));
+ auto __last2i = ranges::next(std::move(__first2), std::move(__last2));
+ return {std::move(__last1i), std::move(__last2i), std::move(__result)};
+ }
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Proj1 = identity, typename _Proj2 = identity,
- indirect_strict_weak_order<projected<_Iter1, _Proj1>,
- projected<_Iter2, _Proj2>>
- _Comp = ranges::less>
- constexpr bool
- includes(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
- _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2)
- if (std::__invoke(__comp,
- std::__invoke(__proj2, *__first2),
- std::__invoke(__proj1, *__first1)))
- return false;
- else if (std::__invoke(__comp,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- ++__first1;
- else
- {
- ++__first1;
+ template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
+ _Comp, _Proj1, _Proj2>
+ constexpr set_intersection_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>, _Out>
+ operator()(_Range1&& __r1, _Range2&& __r2, _Out __result,
+ _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__result), std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __set_intersection_fn set_intersection{};
+
+ template<typename _Iter, typename _Out>
+ using set_difference_result = copy_result<_Iter, _Out>;
+
+ struct __set_difference_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ weakly_incrementable _Out, typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
+ constexpr set_difference_result<_Iter1, _Out>
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2, _Out __result,
+ _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2)
+ if (std::__invoke(__comp,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ {
+ *__result = *__first1;
+ ++__first1;
+ ++__result;
+ }
+ else if (std::__invoke(__comp,
+ std::__invoke(__proj2, *__first2),
+ std::__invoke(__proj1, *__first1)))
++__first2;
- }
+ else
+ {
+ ++__first1;
+ ++__first2;
+ }
+ return ranges::copy(std::move(__first1), std::move(__last1),
+ std::move(__result));
+ }
- return __first2 == __last2;
- }
+ template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
+ _Comp, _Proj1, _Proj2>
+ constexpr set_difference_result<safe_iterator_t<_Range1>, _Out>
+ operator()(_Range1&& __r1, _Range2&& __r2, _Out __result,
+ _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)(ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__result), std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
- template<input_range _Range1, input_range _Range2, typename _Proj1 = identity,
- typename _Proj2 = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range1>, _Proj1>,
- projected<iterator_t<_Range2>, _Proj2>>
- _Comp = ranges::less>
- constexpr bool
- includes(_Range1&& __r1, _Range2&& __r2, _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::includes(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__comp),
- std::move(__proj1), std::move(__proj2));
- }
+ inline constexpr __set_difference_fn set_difference{};
template<typename _Iter1, typename _Iter2, typename _Out>
- using set_union_result = binary_transform_result<_Iter1, _Iter2, _Out>;
+ using set_symmetric_difference_result
+ = binary_transform_result<_Iter1, _Iter2, _Out>;
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- weakly_incrementable _Out, typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
- constexpr set_union_result<_Iter1, _Iter2, _Out>
- set_union(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
- _Out __result, _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2)
- {
+ struct __set_symmetric_difference_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ weakly_incrementable _Out, typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
+ constexpr set_symmetric_difference_result<_Iter1, _Iter2, _Out>
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2,
+ _Out __result, _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ while (__first1 != __last1 && __first2 != __last2)
if (std::__invoke(__comp,
std::__invoke(__proj1, *__first1),
std::__invoke(__proj2, *__first2)))
{
*__result = *__first1;
++__first1;
+ ++__result;
}
else if (std::__invoke(__comp,
std::__invoke(__proj2, *__first2),
{
*__result = *__first2;
++__first2;
+ ++__result;
}
else
{
- *__result = *__first1;
++__first1;
++__first2;
}
- ++__result;
- }
- auto __copy1 = ranges::copy(std::move(__first1), std::move(__last1),
- std::move(__result));
- auto __copy2 = ranges::copy(std::move(__first2), std::move(__last2),
- std::move(__copy1.out));
- return {std::move(__copy1.in), std::move(__copy2.in),
- std::move(__copy2.out)};
- }
-
- template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
- _Comp, _Proj1, _Proj2>
- constexpr set_union_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>, _Out>
- set_union(_Range1&& __r1, _Range2&& __r2, _Out __result, _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::set_union(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__result), std::move(__comp),
- std::move(__proj1), std::move(__proj2));
- }
+ auto __copy1 = ranges::copy(std::move(__first1), std::move(__last1),
+ std::move(__result));
+ auto __copy2 = ranges::copy(std::move(__first2), std::move(__last2),
+ std::move(__copy1.out));
+ return {std::move(__copy1.in), std::move(__copy2.in),
+ std::move(__copy2.out)};
+ }
- template<typename _Iter1, typename _Iter2, typename _Out>
- using set_intersection_result = binary_transform_result<_Iter1, _Iter2, _Out>;
+ template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
+ typename _Comp = ranges::less,
+ typename _Proj1 = identity, typename _Proj2 = identity>
+ requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
+ _Comp, _Proj1, _Proj2>
+ constexpr set_symmetric_difference_result<safe_iterator_t<_Range1>,
+ safe_iterator_t<_Range2>,
+ _Out>
+ operator()(_Range1&& __r1, _Range2&& __r2, _Out __result,
+ _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)
+ (ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__result), std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- weakly_incrementable _Out, typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
- constexpr set_intersection_result<_Iter1, _Iter2, _Out>
- set_intersection(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2, _Out __result,
- _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2)
- if (std::__invoke(__comp,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- ++__first1;
- else if (std::__invoke(__comp,
- std::__invoke(__proj2, *__first2),
- std::__invoke(__proj1, *__first1)))
- ++__first2;
+ inline constexpr __set_symmetric_difference_fn set_symmetric_difference{};
+
+ struct __min_fn
+ {
+ template<typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<projected<const _Tp*, _Proj>>
+ _Comp = ranges::less>
+ constexpr const _Tp&
+ operator()(const _Tp& __a, const _Tp& __b, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (std::__invoke(std::move(__comp),
+ std::__invoke(__proj, __b),
+ std::__invoke(__proj, __a)))
+ return __b;
else
+ return __a;
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ requires indirectly_copyable_storable<iterator_t<_Range>,
+ range_value_t<_Range>*>
+ constexpr range_value_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __first = ranges::begin(__r);
+ auto __last = ranges::end(__r);
+ __glibcxx_assert(__first != __last);
+ auto __result = *__first;
+ while (++__first != __last)
{
- *__result = *__first1;
- ++__first1;
- ++__first2;
- ++__result;
+ auto __tmp = *__first;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, __tmp),
+ std::__invoke(__proj, __result)))
+ __result = std::move(__tmp);
}
- // TODO: Eliminating these variables triggers an ICE.
- auto __last1i = ranges::next(std::move(__first1), std::move(__last1));
- auto __last2i = ranges::next(std::move(__first2), std::move(__last2));
- return {std::move(__last1i), std::move(__last2i), std::move(__result)};
- }
-
- template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
- _Comp, _Proj1, _Proj2>
- constexpr set_intersection_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>, _Out>
- set_intersection(_Range1&& __r1, _Range2&& __r2, _Out __result,
- _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::set_intersection(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__result), std::move(__comp),
- std::move(__proj1), std::move(__proj2));
- }
+ return __result;
+ }
- template<typename _Iter, typename _Out>
- using set_difference_result = copy_result<_Iter, _Out>;
+ template<copyable _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<projected<const _Tp*, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Tp
+ operator()(initializer_list<_Tp> __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::subrange(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- weakly_incrementable _Out, typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
- constexpr set_difference_result<_Iter1, _Out>
- set_difference(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2, _Out __result,
- _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2)
- if (std::__invoke(__comp,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- {
- *__result = *__first1;
- ++__first1;
- ++__result;
- }
- else if (std::__invoke(__comp,
- std::__invoke(__proj2, *__first2),
- std::__invoke(__proj1, *__first1)))
- ++__first2;
+ inline constexpr __min_fn min{};
+
+ struct __max_fn
+ {
+ template<typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<projected<const _Tp*, _Proj>>
+ _Comp = ranges::less>
+ constexpr const _Tp&
+ operator()(const _Tp& __a, const _Tp& __b, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (std::__invoke(std::move(__comp),
+ std::__invoke(__proj, __a),
+ std::__invoke(__proj, __b)))
+ return __b;
else
+ return __a;
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ requires indirectly_copyable_storable<iterator_t<_Range>,
+ range_value_t<_Range>*>
+ constexpr range_value_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __first = ranges::begin(__r);
+ auto __last = ranges::end(__r);
+ __glibcxx_assert(__first != __last);
+ auto __result = *__first;
+ while (++__first != __last)
{
- ++__first1;
- ++__first2;
+ auto __tmp = *__first;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, __result),
+ std::__invoke(__proj, __tmp)))
+ __result = std::move(__tmp);
}
- return ranges::copy(std::move(__first1), std::move(__last1),
- std::move(__result));
- }
-
- template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
- _Comp, _Proj1, _Proj2>
- constexpr set_difference_result<safe_iterator_t<_Range1>, _Out>
- set_difference(_Range1&& __r1, _Range2&& __r2, _Out __result,
- _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return ranges::set_difference(ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__result), std::move(__comp),
- std::move(__proj1), std::move(__proj2));
- }
+ return __result;
+ }
- template<typename _Iter1, typename _Iter2, typename _Out>
- using set_symmetric_difference_result
- = binary_transform_result<_Iter1, _Iter2, _Out>;
+ template<copyable _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<projected<const _Tp*, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Tp
+ operator()(initializer_list<_Tp> __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::subrange(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- weakly_incrementable _Out, typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<_Iter1, _Iter2, _Out, _Comp, _Proj1, _Proj2>
- constexpr set_symmetric_difference_result<_Iter1, _Iter2, _Out>
- set_symmetric_difference(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2,
- _Out __result, _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- while (__first1 != __last1 && __first2 != __last2)
- if (std::__invoke(__comp,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- {
- *__result = *__first1;
- ++__first1;
- ++__result;
- }
- else if (std::__invoke(__comp,
- std::__invoke(__proj2, *__first2),
- std::__invoke(__proj1, *__first1)))
- {
- *__result = *__first2;
- ++__first2;
- ++__result;
- }
- else
- {
- ++__first1;
- ++__first2;
- }
- auto __copy1 = ranges::copy(std::move(__first1), std::move(__last1),
- std::move(__result));
- auto __copy2 = ranges::copy(std::move(__first2), std::move(__last2),
- std::move(__copy1.out));
- return {std::move(__copy1.in), std::move(__copy2.in),
- std::move(__copy2.out)};
- }
-
- template<input_range _Range1, input_range _Range2, weakly_incrementable _Out,
- typename _Comp = ranges::less,
- typename _Proj1 = identity, typename _Proj2 = identity>
- requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _Out,
- _Comp, _Proj1, _Proj2>
- constexpr set_symmetric_difference_result<safe_iterator_t<_Range1>,
- safe_iterator_t<_Range2>,
- _Out>
- set_symmetric_difference(_Range1&& __r1, _Range2&& __r2, _Out __result,
- _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return (ranges::set_symmetric_difference
- (ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__result), std::move(__comp),
- std::move(__proj1), std::move(__proj2)));
- }
-
- template<typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<projected<const _Tp*, _Proj>>
- _Comp = ranges::less>
- constexpr const _Tp&
- min(const _Tp& __a, const _Tp& __b, _Comp __comp = {}, _Proj __proj = {})
- {
- if (std::__invoke(std::move(__comp),
- std::__invoke(__proj, __b),
- std::__invoke(__proj, __a)))
- return __b;
- else
- return __a;
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- requires indirectly_copyable_storable<iterator_t<_Range>,
- range_value_t<_Range>*>
- constexpr range_value_t<_Range>
- min(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __first = ranges::begin(__r);
- auto __last = ranges::end(__r);
- __glibcxx_assert(__first != __last);
- auto __result = *__first;
- while (++__first != __last)
- {
- auto __tmp = *__first;
- if (std::__invoke(__comp,
- std::__invoke(__proj, __tmp),
- std::__invoke(__proj, __result)))
- __result = std::move(__tmp);
- }
- return __result;
- }
-
- template<copyable _Tp, typename _Proj = identity,
- indirect_strict_weak_order<projected<const _Tp*, _Proj>>
- _Comp = ranges::less>
- constexpr _Tp
- min(initializer_list<_Tp> __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::min(ranges::subrange(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<projected<const _Tp*, _Proj>>
- _Comp = ranges::less>
- constexpr const _Tp&
- max(const _Tp& __a, const _Tp& __b, _Comp __comp = {}, _Proj __proj = {})
- {
- if (std::__invoke(std::move(__comp),
- std::__invoke(__proj, __a),
- std::__invoke(__proj, __b)))
- return __b;
- else
- return __a;
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- requires indirectly_copyable_storable<iterator_t<_Range>,
- range_value_t<_Range>*>
- constexpr range_value_t<_Range>
- max(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __first = ranges::begin(__r);
- auto __last = ranges::end(__r);
- __glibcxx_assert(__first != __last);
- auto __result = *__first;
- while (++__first != __last)
- {
- auto __tmp = *__first;
- if (std::__invoke(__comp,
- std::__invoke(__proj, __result),
- std::__invoke(__proj, __tmp)))
- __result = std::move(__tmp);
- }
- return __result;
- }
-
- template<copyable _Tp, typename _Proj = identity,
- indirect_strict_weak_order<projected<const _Tp*, _Proj>>
- _Comp = ranges::less>
- constexpr _Tp
- max(initializer_list<_Tp> __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::max(ranges::subrange(__r),
- std::move(__comp), std::move(__proj));
- }
+ inline constexpr __max_fn max{};
template<typename _Tp>
struct minmax_result
{ return {std::move(min), std::move(max)}; }
};
- template<typename _Tp, typename _Proj = identity,
- indirect_strict_weak_order<projected<const _Tp*, _Proj>>
- _Comp = ranges::less>
- constexpr minmax_result<const _Tp&>
- minmax(const _Tp& __a, const _Tp& __b, _Comp __comp = {}, _Proj __proj = {})
- {
- if (std::__invoke(std::move(__comp),
- std::__invoke(__proj, __b),
- std::__invoke(__proj, __a)))
- return {__b, __a};
- else
- return {__a, __b};
- }
-
- template<input_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- requires indirectly_copyable_storable<iterator_t<_Range>,
- range_value_t<_Range>*>
- constexpr minmax_result<range_value_t<_Range>>
- minmax(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- auto __first = ranges::begin(__r);
- auto __last = ranges::end(__r);
- __glibcxx_assert(__first != __last);
- minmax_result<range_value_t<_Range>> __result = {*__first, *__first};
- while (++__first != __last)
- {
- auto __tmp = *__first;
- if (std::__invoke(__comp,
- std::__invoke(__proj, __tmp),
- std::__invoke(__proj, __result.min)))
- __result.min = std::move(__tmp);
- if (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, __tmp),
- std::__invoke(__proj, __result.max)))
- __result.max = std::move(__tmp);
- }
- return __result;
- }
-
- template<copyable _Tp, typename _Proj = identity,
- indirect_strict_weak_order<projected<const _Tp*, _Proj>>
- _Comp = ranges::less>
- constexpr minmax_result<_Tp>
- minmax(initializer_list<_Tp> __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::minmax(ranges::subrange(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr _Iter
- min_element(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
+ struct __minmax_fn
+ {
+ template<typename _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<projected<const _Tp*, _Proj>>
+ _Comp = ranges::less>
+ constexpr minmax_result<const _Tp&>
+ operator()(const _Tp& __a, const _Tp& __b, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (std::__invoke(std::move(__comp),
+ std::__invoke(__proj, __b),
+ std::__invoke(__proj, __a)))
+ return {__b, __a};
+ else
+ return {__a, __b};
+ }
+
+ template<input_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ requires indirectly_copyable_storable<iterator_t<_Range>,
+ range_value_t<_Range>*>
+ constexpr minmax_result<range_value_t<_Range>>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ auto __first = ranges::begin(__r);
+ auto __last = ranges::end(__r);
+ __glibcxx_assert(__first != __last);
+ minmax_result<range_value_t<_Range>> __result = {*__first, *__first};
+ while (++__first != __last)
+ {
+ auto __tmp = *__first;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, __tmp),
+ std::__invoke(__proj, __result.min)))
+ __result.min = std::move(__tmp);
+ if (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, __tmp),
+ std::__invoke(__proj, __result.max)))
+ __result.max = std::move(__tmp);
+ }
+ return __result;
+ }
+
+ template<copyable _Tp, typename _Proj = identity,
+ indirect_strict_weak_order<projected<const _Tp*, _Proj>>
+ _Comp = ranges::less>
+ constexpr minmax_result<_Tp>
+ operator()(initializer_list<_Tp> __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::subrange(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __minmax_fn minmax{};
+
+ struct __min_element_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return __first;
+
+ auto __i = __first;
+ while (++__i != __last)
+ {
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__i),
+ std::__invoke(__proj, *__first)))
+ __first = __i;
+ }
return __first;
+ }
- auto __i = __first;
- while (++__i != __last)
- {
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__i),
- std::__invoke(__proj, *__first)))
- __first = __i;
- }
- return __first;
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_iterator_t<_Range>
- min_element(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::min_element(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
-
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr _Iter
- max_element(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __min_element_fn min_element{};
+
+ struct __max_element_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr _Iter
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return __first;
+
+ auto __i = __first;
+ while (++__i != __last)
+ {
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__first),
+ std::__invoke(__proj, *__i)))
+ __first = __i;
+ }
return __first;
+ }
- auto __i = __first;
- while (++__i != __last)
- {
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__first),
- std::__invoke(__proj, *__i)))
- __first = __i;
- }
- return __first;
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr safe_iterator_t<_Range>
- max_element(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::max_element(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr safe_iterator_t<_Range>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __max_element_fn max_element{};
template<typename _Iter>
using minmax_element_result = minmax_result<_Iter>;
- template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Proj = identity,
- indirect_strict_weak_order<projected<_Iter, _Proj>>
- _Comp = ranges::less>
- constexpr minmax_element_result<_Iter>
- minmax_element(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
- return {__first, __first};
+ struct __minmax_element_fn
+ {
+ template<forward_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Proj = identity,
+ indirect_strict_weak_order<projected<_Iter, _Proj>>
+ _Comp = ranges::less>
+ constexpr minmax_element_result<_Iter>
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return {__first, __first};
- minmax_element_result<_Iter> __result = {__first, __first};
- auto __i = __first;
- while (++__i != __last)
- {
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__i),
- std::__invoke(__proj, *__result.min)))
- __result.min = __i;
- if (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *__i),
- std::__invoke(__proj, *__result.max)))
- __result.max = __i;
- }
- return __result;
- }
-
- template<forward_range _Range, typename _Proj = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
- _Comp = ranges::less>
- constexpr minmax_element_result<safe_iterator_t<_Range>>
- minmax_element(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::minmax_element(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ minmax_element_result<_Iter> __result = {__first, __first};
+ auto __i = __first;
+ while (++__i != __last)
+ {
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__i),
+ std::__invoke(__proj, *__result.min)))
+ __result.min = __i;
+ if (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *__i),
+ std::__invoke(__proj, *__result.max)))
+ __result.max = __i;
+ }
+ return __result;
+ }
- template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
- input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
- typename _Proj1 = identity, typename _Proj2 = identity,
- indirect_strict_weak_order<projected<_Iter1, _Proj1>,
- projected<_Iter2, _Proj2>>
- _Comp = ranges::less>
- constexpr bool
- lexicographical_compare(_Iter1 __first1, _Sent1 __last1,
- _Iter2 __first2, _Sent2 __last2,
- _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- if constexpr (__detail::__is_normal_iterator<_Iter1>
- || __detail::__is_normal_iterator<_Iter2>)
- return ranges::lexicographical_compare
- (std::__niter_base(std::move(__first1)),
- std::__niter_base(std::move(__last1)),
- std::__niter_base(std::move(__first2)),
- std::__niter_base(std::move(__last2)),
- std::move(__comp),
- std::move(__proj1), std::move(__proj2));
-
- constexpr bool __sized_iters
- = (sized_sentinel_for<_Sent1, _Iter1>
- && sized_sentinel_for<_Sent2, _Iter2>);
- if constexpr (__sized_iters)
- {
- auto __d1 = ranges::distance(__first1, __last1);
- auto __d2 = ranges::distance(__first2, __last2);
-
- using _ValueType1 = iter_value_t<_Iter1>;
- using _ValueType2 = iter_value_t<_Iter2>;
- constexpr bool __use_memcmp
- = ((is_integral_v<_ValueType1> || is_pointer_v<_ValueType1>)
- && is_same_v<_ValueType1, _ValueType2>
- && is_pointer_v<_Iter1>
- && is_pointer_v<_Iter2>
- && (is_same_v<_Comp, ranges::less>
- || is_same_v<_Comp, ranges::greater>)
- && is_same_v<_Proj1, identity>
- && is_same_v<_Proj2, identity>);
- if constexpr (__use_memcmp)
- {
- if (const auto __len = std::min(__d1, __d2))
- {
- const auto __c = std::__memcmp(__first1, __first2, __len);
- if constexpr (is_same_v<_Comp, ranges::less>)
- {
- if (__c < 0)
- return true;
- if (__c > 0)
- return false;
- }
- else if constexpr (is_same_v<_Comp, ranges::greater>)
- {
- if (__c > 0)
- return true;
- if (__c < 0)
- return false;
- }
- else
- __builtin_unreachable();
- }
- return (__last1 - __first1 < __last2 - __first2);
- }
- }
+ template<forward_range _Range, typename _Proj = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>>
+ _Comp = ranges::less>
+ constexpr minmax_element_result<safe_iterator_t<_Range>>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
- for (; __first1 != __last1 && __first2 != __last2;
- ++__first1, (void) ++__first2)
- {
- if (std::__invoke(__comp,
- std::__invoke(__proj1, *__first1),
- std::__invoke(__proj2, *__first2)))
- return true;
- if (std::__invoke(__comp,
- std::__invoke(__proj2, *__first2),
- std::__invoke(__proj1, *__first1)))
- return false;
- }
- return __first1 == __last1 && __first2 != __last2;
- }
+ inline constexpr __minmax_element_fn minmax_element{};
- template<input_range _Range1, input_range _Range2, typename _Proj1 = identity,
- typename _Proj2 = identity,
- indirect_strict_weak_order<projected<iterator_t<_Range1>, _Proj1>,
- projected<iterator_t<_Range2>, _Proj2>>
- _Comp = ranges::less>
- constexpr bool
- lexicographical_compare(_Range1&& __r1, _Range2&& __r2, _Comp __comp = {},
- _Proj1 __proj1 = {}, _Proj2 __proj2 = {})
- {
- return (ranges::lexicographical_compare
- (ranges::begin(__r1), ranges::end(__r1),
- ranges::begin(__r2), ranges::end(__r2),
- std::move(__comp),
- std::move(__proj1), std::move(__proj2)));
- }
+ struct __lexicographical_compare_fn
+ {
+ template<input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
+ input_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
+ typename _Proj1 = identity, typename _Proj2 = identity,
+ indirect_strict_weak_order<projected<_Iter1, _Proj1>,
+ projected<_Iter2, _Proj2>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Iter1 __first1, _Sent1 __last1,
+ _Iter2 __first2, _Sent2 __last2,
+ _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ if constexpr (__detail::__is_normal_iterator<_Iter1>
+ || __detail::__is_normal_iterator<_Iter2>)
+ return (*this)
+ (std::__niter_base(std::move(__first1)),
+ std::__niter_base(std::move(__last1)),
+ std::__niter_base(std::move(__first2)),
+ std::__niter_base(std::move(__last2)),
+ std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+
+ constexpr bool __sized_iters
+ = (sized_sentinel_for<_Sent1, _Iter1>
+ && sized_sentinel_for<_Sent2, _Iter2>);
+ if constexpr (__sized_iters)
+ {
+ auto __d1 = ranges::distance(__first1, __last1);
+ auto __d2 = ranges::distance(__first2, __last2);
+
+ using _ValueType1 = iter_value_t<_Iter1>;
+ using _ValueType2 = iter_value_t<_Iter2>;
+ constexpr bool __use_memcmp
+ = ((is_integral_v<_ValueType1> || is_pointer_v<_ValueType1>)
+ && is_same_v<_ValueType1, _ValueType2>
+ && is_pointer_v<_Iter1>
+ && is_pointer_v<_Iter2>
+ && (is_same_v<_Comp, ranges::less>
+ || is_same_v<_Comp, ranges::greater>)
+ && is_same_v<_Proj1, identity>
+ && is_same_v<_Proj2, identity>);
+ if constexpr (__use_memcmp)
+ {
+ if (const auto __len = std::min(__d1, __d2))
+ {
+ const auto __c = std::__memcmp(__first1, __first2, __len);
+ if constexpr (is_same_v<_Comp, ranges::less>)
+ {
+ if (__c < 0)
+ return true;
+ if (__c > 0)
+ return false;
+ }
+ else if constexpr (is_same_v<_Comp, ranges::greater>)
+ {
+ if (__c > 0)
+ return true;
+ if (__c < 0)
+ return false;
+ }
+ else
+ __builtin_unreachable();
+ }
+ return (__last1 - __first1 < __last2 - __first2);
+ }
+ }
+
+ for (; __first1 != __last1 && __first2 != __last2;
+ ++__first1, (void) ++__first2)
+ {
+ if (std::__invoke(__comp,
+ std::__invoke(__proj1, *__first1),
+ std::__invoke(__proj2, *__first2)))
+ return true;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj2, *__first2),
+ std::__invoke(__proj1, *__first1)))
+ return false;
+ }
+ return __first1 == __last1 && __first2 != __last2;
+ }
+
+ template<input_range _Range1, input_range _Range2, typename _Proj1 = identity,
+ typename _Proj2 = identity,
+ indirect_strict_weak_order<projected<iterator_t<_Range1>, _Proj1>,
+ projected<iterator_t<_Range2>, _Proj2>>
+ _Comp = ranges::less>
+ constexpr bool
+ operator()(_Range1&& __r1, _Range2&& __r2, _Comp __comp = {},
+ _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const
+ {
+ return (*this)
+ (ranges::begin(__r1), ranges::end(__r1),
+ ranges::begin(__r2), ranges::end(__r2),
+ std::move(__comp),
+ std::move(__proj1), std::move(__proj2));
+ }
+ };
+
+ inline constexpr __lexicographical_compare_fn lexicographical_compare;
template<typename _Iter>
struct next_permutation_result
_Iter in;
};
- template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr next_permutation_result<_Iter>
- next_permutation(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
- return {false, std::move(__first)};
+ struct __next_permutation_fn
+ {
+ template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr next_permutation_result<_Iter>
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return {false, std::move(__first)};
- auto __i = __first;
- ++__i;
- if (__i == __last)
- return {false, std::move(__i)};
+ auto __i = __first;
+ ++__i;
+ if (__i == __last)
+ return {false, std::move(__i)};
- auto __lasti = ranges::next(__first, __last);
- __i = __lasti;
- --__i;
+ auto __lasti = ranges::next(__first, __last);
+ __i = __lasti;
+ --__i;
- for (;;)
- {
- auto __ii = __i;
- --__i;
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__i),
- std::__invoke(__proj, *__ii)))
- {
- auto __j = __lasti;
- while (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *__i),
- std::__invoke(__proj, *--__j)))
- ;
- ranges::iter_swap(__i, __j);
- ranges::reverse(__ii, __last);
- return {true, std::move(__lasti)};
- }
- if (__i == __first)
- {
- ranges::reverse(__first, __last);
- return {false, std::move(__lasti)};
- }
- }
- }
+ for (;;)
+ {
+ auto __ii = __i;
+ --__i;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__i),
+ std::__invoke(__proj, *__ii)))
+ {
+ auto __j = __lasti;
+ while (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *__i),
+ std::__invoke(__proj, *--__j)))
+ ;
+ ranges::iter_swap(__i, __j);
+ ranges::reverse(__ii, __last);
+ return {true, std::move(__lasti)};
+ }
+ if (__i == __first)
+ {
+ ranges::reverse(__first, __last);
+ return {false, std::move(__lasti)};
+ }
+ }
+ }
- template<bidirectional_range _Range, typename _Comp = ranges::less,
- typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr next_permutation_result<safe_iterator_t<_Range>>
- next_permutation(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::next_permutation(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ template<bidirectional_range _Range, typename _Comp = ranges::less,
+ typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr next_permutation_result<safe_iterator_t<_Range>>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __next_permutation_fn next_permutation{};
template<typename _Iter>
using prev_permutation_result = next_permutation_result<_Iter>;
- template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
- typename _Comp = ranges::less, typename _Proj = identity>
- requires sortable<_Iter, _Comp, _Proj>
- constexpr prev_permutation_result<_Iter>
- prev_permutation(_Iter __first, _Sent __last,
- _Comp __comp = {}, _Proj __proj = {})
- {
- if (__first == __last)
- return {false, std::move(__first)};
+ struct __prev_permutation_fn
+ {
+ template<bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent,
+ typename _Comp = ranges::less, typename _Proj = identity>
+ requires sortable<_Iter, _Comp, _Proj>
+ constexpr prev_permutation_result<_Iter>
+ operator()(_Iter __first, _Sent __last,
+ _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ if (__first == __last)
+ return {false, std::move(__first)};
- auto __i = __first;
- ++__i;
- if (__i == __last)
- return {false, std::move(__i)};
+ auto __i = __first;
+ ++__i;
+ if (__i == __last)
+ return {false, std::move(__i)};
- auto __lasti = ranges::next(__first, __last);
- __i = __lasti;
- --__i;
+ auto __lasti = ranges::next(__first, __last);
+ __i = __lasti;
+ --__i;
- for (;;)
- {
- auto __ii = __i;
- --__i;
- if (std::__invoke(__comp,
- std::__invoke(__proj, *__ii),
- std::__invoke(__proj, *__i)))
- {
- auto __j = __lasti;
- while (!(bool)std::__invoke(__comp,
- std::__invoke(__proj, *--__j),
- std::__invoke(__proj, *__i)))
- ;
- ranges::iter_swap(__i, __j);
- ranges::reverse(__ii, __last);
- return {true, std::move(__lasti)};
- }
- if (__i == __first)
- {
- ranges::reverse(__first, __last);
- return {false, std::move(__lasti)};
- }
- }
- }
+ for (;;)
+ {
+ auto __ii = __i;
+ --__i;
+ if (std::__invoke(__comp,
+ std::__invoke(__proj, *__ii),
+ std::__invoke(__proj, *__i)))
+ {
+ auto __j = __lasti;
+ while (!(bool)std::__invoke(__comp,
+ std::__invoke(__proj, *--__j),
+ std::__invoke(__proj, *__i)))
+ ;
+ ranges::iter_swap(__i, __j);
+ ranges::reverse(__ii, __last);
+ return {true, std::move(__lasti)};
+ }
+ if (__i == __first)
+ {
+ ranges::reverse(__first, __last);
+ return {false, std::move(__lasti)};
+ }
+ }
+ }
- template<bidirectional_range _Range, typename _Comp = ranges::less,
- typename _Proj = identity>
- requires sortable<iterator_t<_Range>, _Comp, _Proj>
- constexpr prev_permutation_result<safe_iterator_t<_Range>>
- prev_permutation(_Range&& __r, _Comp __comp = {}, _Proj __proj = {})
- {
- return ranges::prev_permutation(ranges::begin(__r), ranges::end(__r),
- std::move(__comp), std::move(__proj));
- }
+ template<bidirectional_range _Range, typename _Comp = ranges::less,
+ typename _Proj = identity>
+ requires sortable<iterator_t<_Range>, _Comp, _Proj>
+ constexpr prev_permutation_result<safe_iterator_t<_Range>>
+ operator()(_Range&& __r, _Comp __comp = {}, _Proj __proj = {}) const
+ {
+ return (*this)(ranges::begin(__r), ranges::end(__r),
+ std::move(__comp), std::move(__proj));
+ }
+ };
+
+ inline constexpr __prev_permutation_fn prev_permutation{};
} // namespace ranges
_GLIBCXX_END_NAMESPACE_VERSION
projects / gcc.git / commitdiff