std::ranges::zip_transform_view<F,Views...>::iterator<Const>::operator[]

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constexpr decltype( auto ) operator[ ] ( difference_type n ) const requires ranges::random_access_range <Base> ;		(since C++23)

Returns the element at specified relative location, after transformation.

Equivalent to

return
    std::apply
    (
        [&]<class... Is>(const Is&... iters) -> decltype(auto)
        {
            return std::invoke(*parent_->fun_, iters[std::iter_difference_t<Is>(n)]...);
        },
        inner_.current_
    );

where *parent_->fun_ is the transformation function of type F stored in the parent ranges::zip_transform_view, and current_ is the underlying tuple of iterators into Views...

Parameters

n

-

position relative to current location.

Return value

The element which is the result of transformation (mapping).

Notes

The behavior is undefined if the parent_ pointer to parent ranges::zip_transform_view is null (e.g. if *this

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Member functions
zip_transform_view::zip_transform_view
zip_transform_view::begin
zip_transform_view::end
zip_transform_view::size
Deduction guides
Iterator
Member functions
zip_transform_view::iterator::iterator
zip_transform_view::iterator::operator*
*zip_transform_view::iterator::operator[]*
zip_transform_view::iterator::operator++ zip_transform_view::iterator::operator++(int) zip_transform_view::iterator::operator-- zip_transform_view::iterator::operator--(int) zip_transform_view::iterator::operator+= zip_transform_view::iterator
Non-member functions
operator==(zip_transform_view::iterator) operator<=>(zip_transform_view::iterator)
operator+(zip_transform_view::iterator) operator-(zip_transform_view::iterator)
Sentinel
Member functions
zip_transform_view::sentinel::sentinel
Non-member functions
operator==(zip_transform_view::sentinel)
operator-(zip_transform_view::sentinel)

std::ranges::zip_transform_view<F,Views...>::iterator<Const>::operator[]

Parameters

Return value

Notes

Example

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