for_each_field

for_each_field_t kumi::for_each_field {}

inlineconstexpr

Callable object applying the Callable object f on each element of a product type and its field.

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 a field or if the product types are not compatible.

See also

kumi::concepts::compatible_product_types

This function can only be applied to record types. The function needs to be defined to handle types modeling kumi::concepts::field.

Header file

#include <kumi/algorithm/for_each.hpp>

Call Signature

template<typename Function, product_type T, product_type... Ts>
constexpr decltype(auto) for_each_field(Function && f, T && t, Ts &&... ts);

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

kumi::for_each_index

Examples

#include <kumi/kumi.hpp>
#include <iostream>
 
using namespace kumi::literals;
 
int main()
{
  auto r = kumi::record{ "name"_id = std::string{"kumi"}, "size"_id = 4 };
 
  kumi::for_each_field( [](auto field, auto& m)
                        { std::cout << field << " = " << m << "\n"; }
                      , r
                      );
 
  std::cout << "\n";
}