for_each()

template<typename Function, concepts::product_type T, concepts::product_type... Ts>
requires (concepts::compatible_product_types<T, Ts...>)

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

inlineconstexpr

Applies the Callable object f on each element of a product type. f is applied on the values if the given product_type is a record type.

Note

This function does not take part in overload resolution if f can't be applied to the elements of t and/or ts, or if the product type are not compatible.

See also

compatible_product_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 are used as arguments to f

See also

kumi::for_each_index

kumi::for_each_field

Examples:

Tuple:

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

Record:

#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  using namespace kumi::literals;
 
  auto t = kumi::record{ "a"_id = 1, "b"_id = 2.3, "c"_id = 0.43f };
 
  kumi::for_each( [](auto& m) { m *= 10; }
                , t
                );
 
  std::cout << t << "\n";
}