NAME¶

std::ranges::zip_transform_view::iterator::operator[] - std::ranges::zip_transform_view::iterator::operator[]

Synopsis¶

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

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 is default constructed).

Example¶

This section is incomplete
Reason: no example

Category:¶

* Todo no example