std::ranges::transform_view<V,F>::iterator<Const>::operator[]

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Ranges library
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(C++23)
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(until C++23)(C++23)


 
 
constexpr decltype(auto) operator[]( difference_type n ) const
  requires ranges::random_access_range<Base>;
(since C++20)

Returns the element at specified relative location, after transformation.

Effectively returns std::invoke(*parent_->fun_, current_[n]), where *parent_->fun_ is the transformation function stored in the parent transform_view, and current_ is the underlying iterator into V.

Parameters

n - position relative to current location.

Return value

the transformed element

Example