From cppreference.com
template< bool Const >
class /*iterator*/;
|
(exposition only*) | |
The return type of elements_view::begin, and of elements_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 | Definition |
Base (private)
|
maybe-const <Const, V>(exposition-only member type*) |
iterator_concept
|
Denotes:
|
iterator_category(conditionally present) |
Not defined, if Base does not model forward_range. Otherwise,
|
value_type
|
std::remove_cvref_t<std::tuple_element_t<N, ranges::range_value_t<Base>>>
|
difference_type
|
ranges::range_difference_t<Base>
|
Data members
| Member | Description |
ranges::iterator_t<Base> current_ (private)
|
an iterator to current element of underlying sequence (exposition-only member object*) |
Member functions
| constructs an iterator (public member function) | |
| returns the underlying iterator (public member function) | |
| accesses the Nth tuple element (public member function) | |
| accesses an element by index (public member function) | |
| advances or decrements the underlying iterator (public member function) |
Non-member functions
| compares the underlying iterators (function) | |
(C++20) |
performs iterator arithmetic (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 const
|
made to consider |
See also
(C++20) |
the return type of ranges::transform_view::begin, and of ranges::transform_view::end when the underlying view is a common_range (private member class template) |