operator[]()

template<typename... Ts>

template<std::size_t I>
requires (I < sizeof...(Ts))

KUMI_TRIVIAL constexpr decltype(auto) kumi::tuple< Ts >::operator[] ( index_t< I >  i ) &

inlineconstexprnoexcept

Extracts the Ith element from a kumi::tuple.

Note

Does not participate in overload resolution if I is not in [0, sizeof...(Ts)).

Parameters

i	Compile-time index of the element to access

Returns

A reference to the selected element of current tuple.

Example:

 
#include <kumi/tuple.hpp>
#include <iostream>
 
int main()
{
  using namespace kumi::literals;
 
  kumi::tuple t = { 1, 2.3, 4.5f, '@' };
 
  std::cout << t[0_c] << "\n";
  std::cout << t[1_c] << "\n";
  std::cout << t[2_c] << "\n";
 
  t[3_c]++;
 
  std::cout << t[kumi::index<3>] << "\n";
}