std::ranges::transform_view::iterator(3)

NAME
std::ranges::transform_view::iterator - std::ranges::transform_view::iterator

Synopsis
   template< bool Const > (since C++20)
   class /*iterator*/ (exposition only*)
   The return type of transform_view::begin, and of transform_view::end when the
   underlying view is a common_range.
   The type /*iterator*/<true> is returned by the const-qualified overloads. The type
   /*iterator*/<false> is returned by the non-const-qualified overloads.

Member types
   Member type Definition
                     const ranges::transform_view<V, F> if Const is true, otherwise
   Parent (private) ranges::transform_view<V, F>.
                     (exposition-only member type*)
   Base (private) const V if Const is true, otherwise V.
                     (exposition-only member type*)
                     std::random_access_iterator_tag if Base models
                     random_access_range,
   iterator_concept std::bidirectional_iterator_tag if Base models
                     bidirectional_range,
                     std::forward_iterator_tag if Base models forward_range,
                     std::input_iterator_tag otherwise.
                     Not defined if Base does not model forward_range.
                     Otherwise, if std::invoke_result_t<F&,
                     ranges::range_reference_t<Base>> is not a reference,
                     std::input_iterator_tag.
   iterator_category
                     Else, let C be
                     std::iterator_traits<ranges::iterator_t<Base>>::iterator_category.
                     If C is std::contiguous_iterator_tag, the type is
                     std::random_access_iterator_tag; otherwise, the type is C.
   value_type std::remove_cvref_t<std::invoke_result_t<F&,
                     ranges::range_reference_t<Base>>>
   difference_type ranges::range_difference_t<Base>
   Data members
   Member object Definition
   current_ (private) An iterator into (possibly const-qualified) V.
                      (exposition-only member object*)
   parent_ (private) A pointer to parent transform_view.
                      (exposition-only member object*)

Member functions
   constructor constructs an iterator
   (C++20) (public member function)
   base returns the underlying iterator
   (C++20) (public member function)
   operator* accesses the transformed element
   (C++20) (public member function)
   operator[] accesses an element by index
   (C++20) (public member function)
   operator++
   operator++(int)
   operator-- advances or decrements the underlying iterator
   operator--(int) (public member function)
   operator+=
   operator-=
   (C++20)

Non-member functions
   operator==
   operator<
   operator> compares the underlying iterators
   operator<= (function)
   operator>=
   operator<=>
   (C++20)
   operator+ performs iterator arithmetic
   operator- (function)
   (C++20)
   iter_move obtains an rvalue reference to the transformed element
   (C++20) (function)
   Defect reports
   The following behavior-changing defect reports were applied retroactively to
   previously published C++ standards.
      DR Applied to Behavior as published Correct behavior
   P2259R1 C++20 member iterator_category is always defined defined only if Base
                        models forward_range
   LWG 3555 C++20 the definition of iterator_concept ignores made to consider
                       const
   LWG 3798 C++20 iterator_category is input-only if may have a stronger
                       transformation result is rvalue reference category