field_cast()

decltype(auto) constexpr field_cast ( T && t )

related

Casts the provided value to the target type using static_cast.

Note

If the type to convert to models kumi::concepts::field, does not rename the input parameter.

Template Parameters

U	The type to convert the parameter to.

Parameters

t	A forwarding reference to the input object.

Returns

A value of type U.

Helper type

namespace kumi::result
{
  template<typename Ts> struct field_cast;
 
  template<typename T> using field_cast_t = typename field_cast<T>::type;
}

Computes the return type of a call to kumi::field_cast

Example:

#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  using namespace kumi::literals;
 
  auto field = ( "x"_id = 1 ); 
  
  auto caster = ( "y"_id = 'x' );
 
  std::cout << field << "\n";
  std::cout << kumi::field_cast<char>(field) << "\n";
  std::cout << kumi::field_cast<decltype(caster)>(field) << "\n";
}