only

template<typename T>

only_t<T> kumi::only = {}

inlineconstexpr

Option specifying the single type a identifier will accept.

Template Parameters

T	Type that the parametrized identifier will accept.

#include <kumi/kumi.hpp>
#include <iostream>
 
using namespace kumi::literals;
 
inline constexpr auto char_value  = kumi::identifier("character"_id, kumi::only<char>);
 
int main()
{
  std::cout << kumi::record{ char_value  = 'Z' } << "\n";
}