W3cubDocs

/C++

std::ranges::join_view<V>::iterator

template< bool Const >
class /*iterator*/

(since C++20)

The return type of join_view::begin, and of join_view::end when both the outer range V and the inner range ranges::range_reference_t<V> satisfy common_range and the parent join_view is a forward_range.

If V is not a simple view (e.g. if ranges::iterator_t<const V> is invalid or different from ranges::iterator_t<V>), Const is true for iterators returned from the const overloads, and false otherwise. If V is a simple view, Const is true if and only if ranges::range_reference_t<V> is a reference.

The name of this class template (shown here as /*iterator*/) is unspecified.

Member types

Member type	Definition
`Parent` (private)	`const join_view<V>` if `Const` is `true`, otherwise `join_view<V>`. The name is for exposition only.
`Base` (private)	`const V` if `Const` is `true`, otherwise `V`. The name is for exposition only.
`OuterIter` (private)	`ranges::iterator_t<Base>`. The name is for exposition only.
`InnerIter` (private)	`ranges::iterator_t<ranges::range_reference_t<Base>>`. The name is for exposition only.
`iterator_concept`	`std::bidirectional_iterator_tag`, if `ranges::range_reference_t<Base>` is a reference type, and `Base` and `ranges::range_reference_t<Base>` each model `bidirectional_range`; `std::forward_iterator_tag`, if `ranges::range_reference_t<Base>` is a reference type, and `Base` and `ranges::range_reference_t<Base>` each model `forward_range`; `std::input_iterator_tag` otherwise.
`iterator_category`	Defined only if `iterator::iterator_concept` (see above) denotes `std::forward_iterator_tag`. Let `OUTERC` be `std::iterator_traits<ranges::iterator_t<Base>>::iterator_category`, and let `INNERC` be `std::iterator_traits<ranges::iterator_t<ranges::range_reference_t<Base>>>::iterator_category`. `std::bidirectional_iterator_tag`, if `OUTERC` and `INNERC` each model `std::derived_from<std::bidirectional_iterator_tag>`; `std::forward_iterator_tag`, if `OUTERC` and `INNERC` each model `std::derived_from<std::forward_iterator_tag>`; `std::input_iterator_tag` otherwise.
`value_type`	`ranges::range_value_t<ranges::range_reference_t<Base>>`
`difference_type`	`std::common_type_t<ranges::range_difference_t<Base>, ranges::range_difference_t<ranges::range_reference_t<Base>>>`

Member objects

Member name	Definition
`outer_` (private)	an object of type `OuterIter`. The name is for exposition only.
`inner_` (private)	an object of type `InnerIter`. The name is for exposition only.
`parent_` (private)	an object of type `Parent`. The name is for exposition only.

Member functions

(constructor) (C++20)	constructs an iterator (public member function)
operator*operator-> (C++20)	accesses the element (public member function)
operator++operator++(int)operator--operator--(int) (C++20)	advances or decrements the underlying iterators (public member function)
satisfy (C++20)	skips over empty inner ranges; the name is for exposition only (exposition-only member function)

Non-member functions

operator== (C++20)	compares the underlying iterators (function)
iter_move (C++20)	casts the result of dereferencing the underlying iterator to its associated rvalue reference type (function)
iter_swap (C++20)	swaps the objects pointed to by two underlying iterators (function)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/ranges/join_view/iterator