for_each_index()

template<typename Function, concepts::product_type T, concepts::product_type... Ts>
requires (!concepts::record_type<T> && (!concepts::record_type<Ts> && ...))

void kumi::for_each_index ( Function f, T && t, Ts &&... ts )

inlineconstexpr

Applies the Callable object f on each element of a product type and its index.

Note

This function does not take part in overload resolution if f can't be applied to the elements of t and/or ts and an integral constant. This function cannot be applied on record types.

Parameters

f	Callable object to be invoked
t	Product type whose elements are used as arguments to f
ts	Other product types whose elements to be used as arguments to f

See also

kumi::for_each

kumi::for_each_field

Example:

#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  auto t = kumi::tuple{ 1ULL, 2.3, 0.43f };
 
  kumi::for_each_index( [](auto i, auto& m) { m += (i+1)*10; }
                      , t
                      );
 
  std::cout << t << "\n";
}