make_str()

template<valid_display_name T>

str kumi::_::make_str ( T const & t )

consteval

#include <kumi/detail/streamable.hpp>

Provides an extension point to_str in order to output types with no textual representation defined.

Note

This function is an implementation detail and only documented to show how to use the to_str extension point. It is used in order to handle identifiers/fields display and manipulations. to_str needs to be constexpr callable, if not some concepts might fail unexpectedly

Template Parameters

T	Type of the element to output.

Parameters

t	The value of the element to output.

Returns

A kumi::str representing the input type

Example:

#include <kumi/kumi.hpp>
#include <iostream>
#include <string>
#include <cstdint>
 
namespace ns
{
  struct tax_t : kumi::identifier<tax_t>
  {
    using kumi::identifier<tax_t>::operator=;
 
    friend constexpr auto to_str(tax_t const&)
    {
      return kumi::str{"Taxes Threshold"}; 
    }
  };
  inline constexpr tax_t tax{};
 
  struct deduction_t : kumi::identifier<deduction_t>
  {
    using kumi::identifier<deduction_t>::operator=;
  };
  inline constexpr deduction_t deduction{};
 
  
}
 
int main()
{
   
  kumi::record payment= {ns::tax = 12.80, ns::deduction = 10.8};
  std::cout << payment << "\n";
}