get() [2/4]

template<str Name, typename... Ts>

decltype(auto) constexpr get ( record< Ts... > &  r )

related

Extracts the element of the field labeled Name from a kumi::record if it exists.

Note

Does not participate in overload resolution if the names are not unique

Template Parameters

Name	Non type template parameter name of the field to access

Parameters

r	Record to index

Returns

A reference to the element of the selected field of r.

Example:

 
#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  using namespace kumi::literals;
 
  kumi::record r = { "x"_f = 1, "y"_f = 2.3, "z"_f = 4.5f, "t"_f = '@' };
  
  std::cout << r["x"_f] << "\n"; 
  std::cout << kumi::get<"x"_f>(r) << "\n";
  std::cout << kumi::get<"y"_f>(r) << "\n";
  std::cout << kumi::get<"z"_f>(r) << "\n";
 
  kumi::get<"t"_f>(r)++;
 
  std::cout << kumi::get<"t"_f>(r) << "\n";
}