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std::ranges::enumerate_view<V>::iterator

template< bool Const >
class /*iterator*/

(since C++23)

The return type of enumerate_view::begin, and of enumerate_view::end when the underlying view V 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.

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

Data members

Typical implementations of /*iterator*/ hold two non-static data members:

current_ of type ranges::iterator_t<Base>, that holds an iterator to the current element;
pos_ of type difference_type, that holds current index.

These names are for exposition only.

Member types

Member type	Definition
`Base` (private)	`const V` if `Const` is `true`, otherwise `V`. The name is for exposition only.
`iterator_category`	`std::input_iterator_tag`
`iterator_concept`	`std::random_access_iterator_tag`, if `Base` models `random_access_range`. Otherwise, `std::bidirectional_iterator_tag`, if `Base` models `bidirectional_range`. Otherwise, `std::forward_iterator_tag`, if `Base` models `forward_range`. Otherwise, `std::input_iterator_tag`.
`difference_type`	`ranges::range_difference_t<Base>`
`value_type`	`std::tuple<difference_type, ranges::range_value_t<Base>>`.
`reference-type` (private)	`std::tuple<difference_type, ranges::range_reference_t<Base>>`. The name is for exposition only.

Member functions

(constructor) (C++23)	constructs an iterator (public member function)
base (C++23)	returns an iterator to current element (public member function)
index (C++23)	returns current index (public member function)
operator* (C++23)	accesses the element (public member function)
operator[] (C++23)	accesses an element by index (public member function)
operator++operator++(int)operator--operator--(int)operator+=operator-= (C++23)	advances or decrements the underlying iterator (public member function)

Non-member functions

operator==operator<=> (C++23)	compares the underlying iterators (function)
operator+operator- (C++23)	performs iterator arithmetic (function)
iter_move (C++23)	casts the result of dereferencing the underlying iterator to its associated rvalue reference type (function)

Example

References

C++23 standard (ISO/IEC 14882:2023):

26.7.23.3 Class template enumerate_view::iterator [range.enumerate.iterator]