// -*- C++ -*- //===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef _LIBCPP_ITERATOR #define _LIBCPP_ITERATOR /* iterator synopsis #include <concepts> namespace std { template<class> struct incrementable_traits; // since C++20 template<class T> using iter_difference_t = see below; // since C++20 template<class> struct indirectly_readable_traits; // since C++20 template<class T> using iter_value_t = see below; // since C++20 template<class Iterator> struct iterator_traits; template<class T> requires is_object_v<T> // since C++20 struct iterator_traits<T*>; template<dereferenceable T> using iter_reference_t = decltype(*declval<T&>()); namespace ranges::inline unspecified { inline constexpr unspecified iter_move = unspecified; // since C++20, nodiscard as an extension }} template<dereferenceable T> requires ... using iter_rvalue_reference_t = decltype(ranges::iter_move(declval<T&>())); // since C++20 // [iterator.concepts], iterator concepts // [iterator.concept.readable], concept indirectly_readable template<class In> concept indirectly_readable = see below; // since C++20 template<indirectly_readable T> using iter_common_reference_t = common_reference_t<iter_reference_t<T>, iter_value_t<T>&>; // since C++20 // [iterator.concept.writable], concept indirectly_writable template<class Out, class T> concept indirectly_writable = see below; // since C++20 // [iterator.concept.winc], concept weakly_incrementable template<class I> concept weakly_incrementable = see below; // since C++20 // [iterator.concept.inc], concept incrementable template<class I> concept incrementable = see below; // since C++20 // [iterator.concept.iterator], concept input_or_output_iterator template<class I> concept input_or_output_iterator = see below; // since C++20 // [iterator.concept.sentinel], concept sentinel_for template<class S, class I> concept sentinel_for = see below; // since C++20 // [iterator.concept.sizedsentinel], concept sized_sentinel_for template<class S, class I> inline constexpr bool disable_sized_sentinel_for = false; template<class S, class I> concept sized_sentinel_for = see below; // [iterator.concept.input], concept input_iterator template<class I> concept input_iterator = see below; // since C++20 // [iterator.concept.output], concept output_iterator template<class I, class T> concept output_iterator = see below; // since C++20 // [iterator.concept.forward], concept forward_iterator template<class I> concept forward_iterator = see below; // since C++20 // [iterator.concept.bidir], concept bidirectional_iterator template<class I> concept bidirectional_iterator = see below; // since C++20 // [iterator.concept.random.access], concept random_access_iterator template<class I> concept random_access_iterator = see below; // since C++20 // [indirectcallable] // [indirectcallable.indirectinvocable] template<class F, class I> concept indirectly_unary_invocable = see below; // since C++20 template<class F, class I> concept indirectly_regular_unary_invocable = see below; // since C++20 template<class F, class I> concept indirect_unary_predicate = see below; // since C++20 template<class F, class I1, class I2> concept indirect_binary_predicate = see below; // since C++20 template<class F, class I1, class I2 = I1> concept indirect_equivalence_relation = see below; // since C++20 template<class F, class I1, class I2 = I1> concept indirect_strict_weak_order = see below; // since C++20 template<class F, class... Is> using indirect_result_t = see below; // since C++20 // [projected], projected template<indirectly_readable I, indirectly_regular_unary_invocable<I> Proj> struct projected; // since C++20 template<weakly_incrementable I, indirectly_regular_unary_invocable<I> Proj> struct incrementable_traits<projected<I, Proj>>; // since C++20 // [alg.req.ind.move], concept indirectly_movable template<class In, class Out> concept indirectly_movable = see below; // since C++20 template<class In, class Out> concept indirectly_movable_storable = see below; // since C++20 // [alg.req.ind.copy], concept indirectly_copyable template<class In, class Out> concept indirectly_copyable = see below; // since C++20 template<class In, class Out> concept indirectly_copyable_storable = see below; // since C++20 // [alg.req.ind.swap], concept indirectly_swappable template<class I1, class I2 = I1> concept indirectly_swappable = see below; // since C++20 template<class I1, class I2, class R, class P1 = identity, class P2 = identity> concept indirectly_comparable = indirect_binary_predicate<R, projected<I1, P1>, projected<I2, P2>>; // since C++20 // [alg.req.permutable], concept permutable template<class I> concept permutable = see below; // since C++20 // [alg.req.mergeable], concept mergeable template<class I1, class I2, class Out, class R = ranges::less, class P1 = identity, class P2 = identity> concept mergeable = see below; // since C++20 // [alg.req.sortable], concept sortable template<class I, class R = ranges::less, class P = identity> concept sortable = see below; // since C++20 template<input_or_output_iterator I, sentinel_for<I> S> requires (!same_as<I, S> && copyable<I>) class common_iterator; // since C++20 template<class Category, class T, class Distance = ptrdiff_t, class Pointer = T*, class Reference = T&> struct iterator // deprecated in C++17 { typedef T value_type; typedef Distance difference_type; typedef Pointer pointer; typedef Reference reference; typedef Category iterator_category; }; struct input_iterator_tag {}; struct output_iterator_tag {}; struct forward_iterator_tag : public input_iterator_tag {}; struct bidirectional_iterator_tag : public forward_iterator_tag {}; struct random_access_iterator_tag : public bidirectional_iterator_tag {}; struct contiguous_iterator_tag : public random_access_iterator_tag {}; // 27.4.3, iterator operations template <class InputIterator, class Distance> // constexpr in C++17 constexpr void advance(InputIterator& i, Distance n); template <class InputIterator> // constexpr in C++17 constexpr typename iterator_traits<InputIterator>::difference_type distance(InputIterator first, InputIterator last); template <class InputIterator> // constexpr in C++17 constexpr InputIterator next(InputIterator x, typename iterator_traits<InputIterator>::difference_type n = 1); template <class BidirectionalIterator> // constexpr in C++17 constexpr BidirectionalIterator prev(BidirectionalIterator x, typename iterator_traits<BidirectionalIterator>::difference_type n = 1); // [range.iter.ops], range iterator operations namespace ranges { // [range.iter.op.advance], ranges::advance template<input_or_output_iterator I> constexpr void advance(I& i, iter_difference_t<I> n); // since C++20 template<input_or_output_iterator I, sentinel_for<I> S> constexpr void advance(I& i, S bound); // since C++20 template<input_or_output_iterator I, sentinel_for<I> S> constexpr iter_difference_t<I> advance(I& i, iter_difference_t<I> n, S bound); // since C++20 } template <class Iterator> class reverse_iterator : public iterator<typename iterator_traits<Iterator>::iterator_category, // until C++17 typename iterator_traits<Iterator>::value_type, typename iterator_traits<Iterator>::difference_type, typename iterator_traits<Iterator>::pointer, typename iterator_traits<Iterator>::reference> { protected: Iterator current; public: using iterator_type = Iterator; using iterator_concept = see below; // since C++20 using iterator_category = typename iterator_traits<Iterator>::iterator_category; // since C++17, until C++20 using iterator_category = see below; // since C++20 using value_type = typename iterator_traits<Iterator>::value_type; // since C++17, until C++20 using value_type = iter_value_t<Iterator>; // since C++20 using difference_type = typename iterator_traits<Iterator>::difference_type; // until C++20 using difference_type = iter_difference_t<Iterator>; // since C++20 using pointer = typename iterator_traits<Iterator>::pointer; using reference = typename iterator_traits<Iterator>::reference; // until C++20 using reference = iter_reference_t<Iterator>; // since C++20 constexpr reverse_iterator(); constexpr explicit reverse_iterator(Iterator x); template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); constexpr Iterator base() const; constexpr reference operator*() const; constexpr pointer operator->() const; // until C++20 constexpr pointer operator->() const requires see below; // since C++20 constexpr reverse_iterator& operator++(); constexpr reverse_iterator operator++(int); constexpr reverse_iterator& operator--(); constexpr reverse_iterator operator--(int); constexpr reverse_iterator operator+ (difference_type n) const; constexpr reverse_iterator& operator+=(difference_type n); constexpr reverse_iterator operator- (difference_type n) const; constexpr reverse_iterator& operator-=(difference_type n); constexpr unspecified operator[](difference_type n) const; friend constexpr iter_rvalue_reference_t<Iterator> iter_move(const reverse_iterator& i) noexcept(see below); template<indirectly_swappable<Iterator> Iterator2> friend constexpr void iter_swap(const reverse_iterator& x, const reverse_iterator<Iterator2>& y) noexcept(see below); }; template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template<class Iterator1, three_way_comparable_with<Iterator1> Iterator2> constexpr compare_three_way_result_t<Iterator1, Iterator2> operator<=>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr auto operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) -> decltype(__y.base() - __x.base()); // constexpr in C++17 template <class Iterator> constexpr reverse_iterator<Iterator> operator+(typename reverse_iterator<Iterator>::difference_type n, const reverse_iterator<Iterator>& x); // constexpr in C++17 template <class Iterator> constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 template<class Iterator1, class Iterator2> requires (!sized_sentinel_for<Iterator1, Iterator2>) inline constexpr bool disable_sized_sentinel_for<reverse_iterator<Iterator1>, reverse_iterator<Iterator2>> = true; template <class Container> class back_insert_iterator : public iterator<output_iterator_tag, void, void, void, void> // until C++17 { protected: Container* container; public: typedef Container container_type; typedef void value_type; typedef void difference_type; // until C++20 typedef ptrdiff_t difference_type; // since C++20 typedef void reference; typedef void pointer; explicit back_insert_iterator(Container& x); // constexpr in C++20 back_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 back_insert_iterator& operator*(); // constexpr in C++20 back_insert_iterator& operator++(); // constexpr in C++20 back_insert_iterator operator++(int); // constexpr in C++20 }; template <class Container> back_insert_iterator<Container> back_inserter(Container& x); // constexpr in C++20 template <class Container> class front_insert_iterator : public iterator<output_iterator_tag, void, void, void, void> // until C++17 { protected: Container* container; public: typedef Container container_type; typedef void value_type; typedef void difference_type; // until C++20 typedef ptrdiff_t difference_type; // since C++20 typedef void reference; typedef void pointer; explicit front_insert_iterator(Container& x); // constexpr in C++20 front_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 front_insert_iterator& operator*(); // constexpr in C++20 front_insert_iterator& operator++(); // constexpr in C++20 front_insert_iterator operator++(int); // constexpr in C++20 }; template <class Container> front_insert_iterator<Container> front_inserter(Container& x); // constexpr in C++20 template <class Container> class insert_iterator : public iterator<output_iterator_tag, void, void, void, void> // until C++17 { protected: Container* container; typename Container::iterator iter; public: typedef Container container_type; typedef void value_type; typedef void difference_type; // until C++20 typedef ptrdiff_t difference_type; // since C++20 typedef void reference; typedef void pointer; insert_iterator(Container& x, typename Container::iterator i); // constexpr in C++20 insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 insert_iterator& operator*(); // constexpr in C++20 insert_iterator& operator++(); // constexpr in C++20 insert_iterator& operator++(int); // constexpr in C++20 }; template <class Container> insert_iterator<Container> inserter(Container& x, typename Container::iterator i); // until C++20 template <class Container> constexpr insert_iterator<Container> inserter(Container& x, ranges::iterator_t<Container> i); // since C++20 template <class Iterator> class move_iterator { public: using iterator_type = Iterator; using iterator_concept = see below; // From C++20 using iterator_category = see below; // not always present starting from C++20 using value_type = iter_value_t<Iterator>; // Until C++20, iterator_traits<Iterator>::value_type using difference_type = iter_difference_t<Iterator>; // Until C++20, iterator_traits<Iterator>::difference_type; using pointer = Iterator; using reference = iter_rvalue_reference_t<Iterator>; // Until C++20, value_type&& constexpr move_iterator(); // all the constexprs are in C++17 constexpr explicit move_iterator(Iterator i); template <class U> constexpr move_iterator(const move_iterator<U>& u); template <class U> constexpr move_iterator& operator=(const move_iterator<U>& u); constexpr iterator_type base() const; // Until C++20 constexpr const Iterator& base() const & noexcept; // From C++20 constexpr Iterator base() &&; // From C++20 constexpr reference operator*() const; constexpr pointer operator->() const; // Deprecated in C++20 constexpr move_iterator& operator++(); constexpr auto operator++(int); // Return type was move_iterator until C++20 constexpr move_iterator& operator--(); constexpr move_iterator operator--(int); constexpr move_iterator operator+(difference_type n) const; constexpr move_iterator& operator+=(difference_type n); constexpr move_iterator operator-(difference_type n) const; constexpr move_iterator& operator-=(difference_type n); constexpr reference operator[](difference_type n) const; // Return type unspecified until C++20 template<sentinel_for<Iterator> S> friend constexpr bool operator==(const move_iterator& x, const move_sentinel<S>& y); // Since C++20 template<sized_sentinel_for<Iterator> S> friend constexpr iter_difference_t<Iterator> operator-(const move_sentinel<S>& x, const move_iterator& y); // Since C++20 template<sized_sentinel_for<Iterator> S> friend constexpr iter_difference_t<Iterator> operator-(const move_iterator& x, const move_sentinel<S>& y); // Since C++20 friend constexpr iter_rvalue_reference_t<Iterator> iter_move(const move_iterator& i) noexcept(noexcept(ranges::iter_move(i.current))); // Since C++20 template<indirectly_swappable<Iterator> Iterator2> friend constexpr void iter_swap(const move_iterator& x, const move_iterator<Iterator2>& y) noexcept(noexcept(ranges::iter_swap(x.current, y.current))); // Since C++20 private: Iterator current; // exposition only }; template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr bool // constexpr in C++17 operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); template <class Iterator1, class Iterator2> constexpr auto // constexpr in C++17 operator-(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); template <class Iterator> constexpr move_iterator<Iterator> operator+( // constexpr in C++17 typename move_iterator<Iterator>::difference_type n, const move_iterator<Iterator>& x); template <class Iterator> // constexpr in C++17 constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); template<class Iterator1, class Iterator2> requires (!sized_sentinel_for<Iterator1, Iterator2>) inline constexpr bool disable_sized_sentinel_for<move_iterator<Iterator1>, // since C++20 move_iterator<Iterator2>> = true; template<semiregular S> class move_sentinel { public: constexpr move_sentinel(); constexpr explicit move_sentinel(S s); template<class S2> requires convertible_to<const S2&, S> constexpr move_sentinel(const move_sentinel<S2>& s); template<class S2> requires assignable_from<S&, const S2&> constexpr move_sentinel& operator=(const move_sentinel<S2>& s); constexpr S base() const; private: S last; // exposition only }; // [default.sentinel], default sentinel struct default_sentinel_t; inline constexpr default_sentinel_t default_sentinel{}; // [iterators.counted], counted iterators template<input_or_output_iterator I> class counted_iterator; template<input_iterator I> requires see below struct iterator_traits<counted_iterator<I>>; // [unreachable.sentinel], unreachable sentinel struct unreachable_sentinel_t; inline constexpr unreachable_sentinel_t unreachable_sentinel{}; template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> class istream_iterator : public iterator<input_iterator_tag, T, Distance, const T*, const T&> // until C++17 { public: typedef input_iterator_tag iterator_category; typedef T value_type; typedef Distance difference_type; typedef const T* pointer; typedef const T& reference; typedef charT char_type; typedef traits traits_type; typedef basic_istream<charT, traits> istream_type; istream_iterator(); // constexpr since C++11 constexpr istream_iterator(default_sentinel_t); // since C++20 istream_iterator(istream_type& s); istream_iterator(const istream_iterator& x); ~istream_iterator(); const T& operator*() const; const T* operator->() const; istream_iterator& operator++(); istream_iterator operator++(int); friend bool operator==(const istream_iterator& i, default_sentinel_t); // since C++20 }; template <class T, class charT, class traits, class Distance> bool operator==(const istream_iterator<T,charT,traits,Distance>& x, const istream_iterator<T,charT,traits,Distance>& y); template <class T, class charT, class traits, class Distance> bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, const istream_iterator<T,charT,traits,Distance>& y); // until C++20 template <class T, class charT = char, class traits = char_traits<charT> > class ostream_iterator : public iterator<output_iterator_tag, void, void, void, void> // until C++17 { public: typedef output_iterator_tag iterator_category; typedef void value_type; typedef void difference_type; // until C++20 typedef ptrdiff_t difference_type; // since C++20 typedef void pointer; typedef void reference; typedef charT char_type; typedef traits traits_type; typedef basic_ostream<charT,traits> ostream_type; ostream_iterator(ostream_type& s); ostream_iterator(ostream_type& s, const charT* delimiter); ostream_iterator(const ostream_iterator& x); ~ostream_iterator(); ostream_iterator& operator=(const T& value); ostream_iterator& operator*(); ostream_iterator& operator++(); ostream_iterator& operator++(int); }; template<class charT, class traits = char_traits<charT> > class istreambuf_iterator : public iterator<input_iterator_tag, charT, traits::off_type, unspecified, charT> // until C++17 { public: typedef input_iterator_tag iterator_category; typedef charT value_type; typedef traits::off_type difference_type; typedef unspecified pointer; typedef charT reference; typedef charT char_type; typedef traits traits_type; typedef traits::int_type int_type; typedef basic_streambuf<charT, traits> streambuf_type; typedef basic_istream<charT, traits> istream_type; istreambuf_iterator() noexcept; // constexpr since C++11 constexpr istreambuf_iterator(default_sentinel_t) noexcept; // since C++20 istreambuf_iterator(istream_type& s) noexcept; istreambuf_iterator(streambuf_type* s) noexcept; istreambuf_iterator(a-private-type) noexcept; charT operator*() const; pointer operator->() const; istreambuf_iterator& operator++(); a-private-type operator++(int); bool equal(const istreambuf_iterator& b) const; friend bool operator==(const istreambuf_iterator& i, default_sentinel_t s); // since C++20 }; template <class charT, class traits> bool operator==(const istreambuf_iterator<charT,traits>& a, const istreambuf_iterator<charT,traits>& b); template <class charT, class traits> bool operator!=(const istreambuf_iterator<charT,traits>& a, const istreambuf_iterator<charT,traits>& b); // until C++20 template <class charT, class traits = char_traits<charT> > class ostreambuf_iterator : public iterator<output_iterator_tag, void, void, void, void> // until C++17 { public: typedef output_iterator_tag iterator_category; typedef void value_type; typedef void difference_type; // until C++20 typedef ptrdiff_t difference_type; // since C++20 typedef void pointer; typedef void reference; typedef charT char_type; typedef traits traits_type; typedef basic_streambuf<charT, traits> streambuf_type; typedef basic_ostream<charT, traits> ostream_type; ostreambuf_iterator(ostream_type& s) noexcept; ostreambuf_iterator(streambuf_type* s) noexcept; ostreambuf_iterator& operator=(charT c); ostreambuf_iterator& operator*(); ostreambuf_iterator& operator++(); ostreambuf_iterator& operator++(int); bool failed() const noexcept; }; template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); // constexpr since C++17 template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); // constexpr since C++17 template <class C> constexpr auto end(C& c) -> decltype(c.end()); // constexpr since C++17 template <class C> constexpr auto end(const C& c) -> decltype(c.end()); // constexpr since C++17 template <class T, size_t N> constexpr T* begin(T (&array)[N]) noexcept; template <class T, size_t N> constexpr T* end(T (&array)[N]) noexcept; template <class C> constexpr auto cbegin(const C& c) noexcept(see-below) -> decltype(std::begin(c)); // C++14 template <class C> constexpr auto cend(const C& c) noexcept(see-below) -> decltype(std::end(c)); // C++14 template <class C> constexpr auto rbegin(C& c) -> decltype(c.rbegin()); // C++14, constexpr since C++17 template <class C> constexpr auto rbegin(const C& c) -> decltype(c.rbegin()); // C++14, constexpr since C++17 template <class C> constexpr auto rend(C& c) -> decltype(c.rend()); // C++14, constexpr since C++17 template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14, constexpr since C++17 template <class E> constexpr reverse_iterator<const E*> rbegin(initializer_list<E> il); // C++14, constexpr since C++17 template <class E> constexpr reverse_iterator<const E*> rend(initializer_list<E> il); // C++14, constexpr since C++17 template <class T, size_t N> constexpr reverse_iterator<T*> rbegin(T (&array)[N]); // C++14, constexpr since C++17 template <class T, size_t N> constexpr reverse_iterator<T*> rend(T (&array)[N]); // C++14, constexpr since C++17 template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14, constexpr since C++17 template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14, constexpr since C++17 // 24.8, container access: template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 template <class C> constexpr auto ssize(const C& c) -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 } // std */ #include <__config> #include <__iterator/access.h> #include <__iterator/advance.h> #include <__iterator/back_insert_iterator.h> #include <__iterator/distance.h> #include <__iterator/front_insert_iterator.h> #include <__iterator/insert_iterator.h> #include <__iterator/istream_iterator.h> #include <__iterator/istreambuf_iterator.h> #include <__iterator/iterator.h> #include <__iterator/iterator_traits.h> #include <__iterator/move_iterator.h> #include <__iterator/next.h> #include <__iterator/ostream_iterator.h> #include <__iterator/ostreambuf_iterator.h> #include <__iterator/prev.h> #include <__iterator/reverse_iterator.h> #include <__iterator/wrap_iter.h> #if _LIBCPP_STD_VER >= 14 # include <__iterator/reverse_access.h> #endif #if _LIBCPP_STD_VER >= 17 # include <__iterator/data.h> # include <__iterator/empty.h> # include <__iterator/size.h> #endif #if _LIBCPP_STD_VER >= 20 # include <__iterator/common_iterator.h> # include <__iterator/concepts.h> # include <__iterator/counted_iterator.h> # include <__iterator/default_sentinel.h> # include <__iterator/incrementable_traits.h> # include <__iterator/indirectly_comparable.h> # include <__iterator/iter_move.h> # include <__iterator/iter_swap.h> # include <__iterator/mergeable.h> # include <__iterator/move_sentinel.h> # include <__iterator/permutable.h> # include <__iterator/projected.h> # include <__iterator/readable_traits.h> # include <__iterator/sortable.h> # include <__iterator/unreachable_sentinel.h> #endif #include <version> // standard-mandated includes // [iterator.synopsis] #include <compare> #include <concepts> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17 # include <variant> #endif #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 # include <cstdlib> # include <exception> # include <new> # include <type_traits> # include <typeinfo> # include <utility> #endif #endif // _LIBCPP_ITERATOR
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