operator[]() [3/4]

template<typename... Ts>

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

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

inlineconstexprnoexcept

Extracts the Ith field from a kumi::record.

Note

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

Parameters

i	Compile-time index of the field to access

Returns

A reference to the selected field of current record.

Example:

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