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

Returns an element at specified relative location, as if by /*get-element*/ (this- >base( ) + n) , where for an expression e, /*get-element*/(e)

• std::get<N>(*e) , if ranges::range_reference_t<Base>
• static_cast <E> (std:: get <N> ( *e) ) , where E is std::remove_cv_t < std::tuple_element_t <N, ranges::range_reference_t <Base>>>

Parameters

Return value

The element at displacement n relative to the current location.

Example

#include <iostream>
#include <ranges>
#include <string_view>
#include <tuple>
 
int main()
{
    using T = std::tuple<int, char, std::string_view>;
 
    const auto il =
    {
        T{1, 'A', "α"},
        T{2, 'B', "β"},
        T{3, 'C', "γ"},
    };
 
    std::cout << std::views::elements<0>(il)[1] << ' '   // 2
              << std::views::elements<1>(il)[1] << ' '   // B
              << std::views::elements<2>(il)[1] << '\n'; // β
}

2 B β

See also