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

From cppreference.com
Ranges library
Range adaptors
constexpr decltype ( auto ) operator * ( ) const
noexcept ( /* see description */ ) ;
(since C++23)

Returns the transformed element obtained by application of the invocable object of type F to the underlying poined-to elements.

Equivalent to

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

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

Parameters

(none)

Return value

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

Exceptions

noexcept specification:
noexcept ( std:: invoke ( * parent_ - > fun_, * std :: get < INTS > ( inner_. current_ ) ... ) )
where INTS is the pack of integers 0, 1, ..., (sizeof...(Views)-1) .

Notes

operator - > is not provided.

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

Example