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Showing content from https://en.cppreference.com/w/cpp/algorithm/../header/experimental/ranges/iterator.html below:

Experimental library header <experimental/ranges/iterator> - cppreference.com

namespace std { namespace experimental { namespace ranges { inline namespace v1 {
 
template <class T> concept bool /* dereferenceable */ // exposition only
  = requires(T& t) { {*t} -> auto&&; };
 
namespace {
  constexpr /* unspecified */ iter_move = /* unspecified */;
  constexpr /* unspecified */ iter_swap = /* unspecified */;
}
 
template <class> struct difference_type;
template <class T> using difference_type_t
  = typename difference_type<T>::type;
 
template <class> struct value_type;
template <class T> using value_type_t
  = typename value_type<T>::type;
 
template <class> struct iterator_category;
template <class T> using iterator_category_t
  = typename iterator_category<T>::type;
 
template </* dereferenceable */ T> using reference_t
  = decltype(*declval<T&>());
 
template </* dereferenceable */ T>
    requires /* see definition */ using rvalue_reference_t
  = decltype(ranges::iter_move(declval<T&>()));
 
template <class In>
concept bool Readable = /* see definition */;
 
template <class Out, class T>
concept bool Writable = /* see definition */;
 
template <class I>
concept bool WeaklyIncrementable = /* see definition */;
 
template <class I>
concept bool Incrementable = /* see definition */;
 
template <class I>
concept bool Iterator = /* see definition */;
 
template <class S, class I>
concept bool Sentinel = /* see definition */;
 
template <class S, class I>
  constexpr bool disable_sized_sentinel = false;
 
template <class S, class I>
concept bool SizedSentinel = /* see definition */;
 
template <class I>
concept bool InputIterator = /* see definition */;
 
template <class I>
concept bool OutputIterator = /* see definition */;
 
template <class I>
concept bool ForwardIterator = /* see definition */;
 
template <class I>
concept bool BidirectionalIterator = /* see definition */;
 
template <class I>
concept bool RandomAccessIterator = /* see definition */;
 
template <class F, class I>
concept bool IndirectUnaryInvocable = /* see definition */;
 
template <class F, class I>
concept bool IndirectRegularUnaryInvocable = /* see definition */;
 
template <class F, class I>
concept bool IndirectUnaryPredicate = /* see definition */;
 
template <class F, class I1, class I2 = I1>
concept bool IndirectRelation = /* see definition */;
 
template <class F, class I1, class I2 = I1>
concept bool IndirectStrictWeakOrder = /* see definition */;
 
template <class> struct indirect_result_of;
 
template <class F, class... Is>
  requires Invocable<F, reference_t<Is>...>
struct indirect_result_of<F(Is...)>;
 
template <class F>
using indirect_result_of_t
  = typename indirect_result_of<F>::type;
 
template <Readable I, IndirectRegularUnaryInvocable<I> Proj>
struct projected;
 
template <WeaklyIncrementable I, class Proj>
struct difference_type<projected<I, Proj>>;
 
template <class In, class Out>
concept bool IndirectlyMovable = /* see definition */;
 
template <class In, class Out>
concept bool IndirectlyMovableStorable = /* see definition */;
 
template <class In, class Out>
concept bool IndirectlyCopyable = /* see definition */;
 
template <class In, class Out>
concept bool IndirectlyCopyableStorable = /* see definition */;
 
template <class I1, class I2 = I1>
concept bool IndirectlySwappable = /* see definition */;
 
template <class I1, class I2, class R = equal_to<>, class P1 = identity,
    class P2 = identity>
concept bool IndirectlyComparable = /* see definition */;
 
template <class I>
concept bool Permutable = /* see definition */;
 
template <class I1, class I2, class Out,
    class R = less<>, class P1 = identity, class P2 = identity>
concept bool Mergeable = /* see definition */;
 
template <class I, class R = less<>, class P = identity>
concept bool Sortable = /* see definition */;
 
template <class Iterator> using iterator_traits = /* see definition */;
 
template <Readable T> using iter_common_reference_t
  = common_reference_t<reference_t<T>, value_type_t<T>&>;
 
struct output_iterator_tag { };
struct input_iterator_tag { };
struct forward_iterator_tag : input_iterator_tag { };
struct bidirectional_iterator_tag : forward_iterator_tag { };
struct random_access_iterator_tag : bidirectional_iterator_tag { };
 
namespace {
  constexpr /* unspecified */ advance = /* unspecified */;
  constexpr /* unspecified */ distance = /* unspecified */;
  constexpr /* unspecified */ next = /* unspecified */;
  constexpr /* unspecified */ prev = /* unspecified */;
}
 
template <BidirectionalIterator I> class reverse_iterator;
 
template <class I1, class I2>
    requires EqualityComparableWith<I1, I2>
  constexpr bool operator==(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
template <class I1, class I2>
    requires EqualityComparableWith<I1, I2>
  constexpr bool operator!=(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator<(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator>(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator>=(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator<=(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
 
template <class I1, class I2>
    requires SizedSentinel<I1, I2>
  constexpr difference_type_t<I2> operator-(
    const reverse_iterator<I1>& x,
    const reverse_iterator<I2>& y);
template <RandomAccessIterator I>
  constexpr reverse_iterator<I> operator+(
    difference_type_t<I> n,
    const reverse_iterator<I>& x);
 
template <BidirectionalIterator I>
constexpr reverse_iterator<I> make_reverse_iterator(I i);
 
template <class Container> class back_insert_iterator;
template <class Container>
  back_insert_iterator<Container> back_inserter(Container& x);
 
template <class Container> class front_insert_iterator;
template <class Container>
  front_insert_iterator<Container> front_inserter(Container& x);
 
template <class Container> class insert_iterator;
template <class Container>
  insert_iterator<Container> inserter(Container& x, iterator_t<Container> i);
 
template <InputIterator I> class move_iterator;
 
template <class I1, class I2>
    requires EqualityComparableWith<I1, I2>
  constexpr bool operator==(
    const move_iterator<I1>& x, const move_iterator<I2>& y);
template <class I1, class I2>
    requires EqualityComparableWith<I1, I2>
  constexpr bool operator!=(
    const move_iterator<I1>& x, const move_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator<(
    const move_iterator<I1>& x, const move_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator<=(
    const move_iterator<I1>& x, const move_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator>(
    const move_iterator<I1>& x, const move_iterator<I2>& y);
template <class I1, class I2>
    requires StrictTotallyOrderedWith<I1, I2>
  constexpr bool operator>=(
    const move_iterator<I1>& x, const move_iterator<I2>& y);
 
template <class I1, class I2>
    requires SizedSentinel<I1, I2>
  constexpr difference_type_t<I2> operator-(
    const move_iterator<I1>& x,
    const move_iterator<I2>& y);
template <RandomAccessIterator I>
  constexpr move_iterator<I> operator+(
    difference_type_t<I> n,
    const move_iterator<I>& x);
 
template <InputIterator I>
  constexpr move_iterator<I> make_move_iterator(I i);
 
template <Semiregular S> class move_sentinel;
 
template <class I, Sentinel<I> S>
  constexpr bool operator==(
    const move_iterator<I>& i, const move_sentinel<S>& s);
template <class I, Sentinel<I> S>
  constexpr bool operator==(
    const move_sentinel<S>& s, const move_iterator<I>& i);
template <class I, Sentinel<I> S>
  constexpr bool operator!=(
    const move_iterator<I>& i, const move_sentinel<S>& s);
template <class I, Sentinel<I> S>
  constexpr bool operator!=(
    const move_sentinel<S>& s, const move_iterator<I>& i);
 
template <class I, SizedSentinel<I> S>
  constexpr difference_type_t<I> operator-(
    const move_sentinel<S>& s, const move_iterator<I>& i);
template <class I, SizedSentinel<I> S>
  constexpr difference_type_t<I> operator-(
    const move_iterator<I>& i, const move_sentinel<S>& s);
 
template <Semiregular S>
  constexpr move_sentinel<S> make_move_sentinel(S s);
 
template <Iterator I, Sentinel<I> S>
  requires !Same<I, S>
class common_iterator;
 
template <Readable I, class S>
struct value_type<common_iterator<I, S>>;
 
template <InputIterator I, class S>
struct iterator_category<common_iterator<I, S>>;
 
template <ForwardIterator I, class S>
struct iterator_category<common_iterator<I, S>>;
 
template <class I1, class I2, Sentinel<I2> S1, Sentinel<I1> S2>
bool operator==(
  const common_iterator<I1, S1>& x, const common_iterator<I2, S2>& y);
template <class I1, class I2, Sentinel<I2> S1, Sentinel<I1> S2>
  requires EqualityComparableWith<I1, I2>
bool operator==(
  const common_iterator<I1, S1>& x, const common_iterator<I2, S2>& y);
template <class I1, class I2, Sentinel<I2> S1, Sentinel<I1> S2>
bool operator!=(
  const common_iterator<I1, S1>& x, const common_iterator<I2, S2>& y);
 
template <class I2, SizedSentinel<I2> I1, SizedSentinel<I2> S1, SizedSentinel<I1> S2>
difference_type_t<I2> operator-(
  const common_iterator<I1, S1>& x, const common_iterator<I2, S2>& y);
 
class default_sentinel;
 
template <Iterator I> class counted_iterator;
 
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr bool operator==(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
constexpr bool operator==(
  const counted_iterator<auto>& x, default_sentinel);
constexpr bool operator==(
  default_sentinel, const counted_iterator<auto>& x);
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr bool operator!=(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
constexpr bool operator!=(
  const counted_iterator<auto>& x, default_sentinel y);
constexpr bool operator!=(
  default_sentinel x, const counted_iterator<auto>& y);
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr bool operator<(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr bool operator<=(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr bool operator>(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr bool operator>=(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
 
template <class I1, class I2>
    requires Common<I1, I2>
  constexpr difference_type_t<I2> operator-(
    const counted_iterator<I1>& x, const counted_iterator<I2>& y);
template <class I>
  constexpr difference_type_t<I> operator-(
    const counted_iterator<I>& x, default_sentinel y);
template <class I>
  constexpr difference_type_t<I> operator-(
    default_sentinel x, const counted_iterator<I>& y);
template <RandomAccessIterator I>
  constexpr counted_iterator<I>
    operator+(difference_type_t<I> n, const counted_iterator<I>& x);
 
template <Iterator I>
  constexpr counted_iterator<I> make_counted_iterator(I i, difference_type_t<I> n);
 
class unreachable;
template <Iterator I>
  constexpr bool operator==(const I&, unreachable) noexcept;
template <Iterator I>
  constexpr bool operator==(unreachable, const I&) noexcept;
template <Iterator I>
  constexpr bool operator!=(const I&, unreachable) noexcept;
template <Iterator I>
  constexpr bool operator!=(unreachable, const I&) noexcept;
 
template <class T> class dangling;
 
template <class T, class CharT = char, class Traits = char_traits<CharT>,
    class Distance = ptrdiff_t>
  class istream_iterator;
 
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==(default_sentinel 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,
    default_sentinel 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);
template <class T, class CharT, class Traits, class Distance>
  bool operator!=(default_sentinel 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,
    default_sentinel y);
 
template <class T, class CharT = char, class Traits = char_traits<CharT>>
  class ostream_iterator;
 
template <class CharT, class Traits = char_traits<CharT> >
  class istreambuf_iterator;
 
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==(default_sentinel a,
    const istreambuf_iterator<CharT, Traits>& b);
template <class CharT, class Traits>
  bool operator==(const istreambuf_iterator<CharT, Traits>& a,
    default_sentinel b);
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!=(default_sentinel a,
    const istreambuf_iterator<CharT, Traits>& b);
template <class CharT, class Traits>
  bool operator!=(const istreambuf_iterator<CharT, Traits>& a,
    default_sentinel b);
 
template <class CharT, class Traits = char_traits<CharT> >
  class ostreambuf_iterator;
 
}}}}
 
namespace std {
  template <experimental::ranges::Iterator Out>
    struct iterator_traits<Out>;
  template <experimental::ranges::InputIterator In>
    struct iterator_traits<In>;
  template <experimental::ranges::InputIterator In>
      requires experimental::ranges::Sentinel<In, In>
    struct iterator_traits;
}

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