utx::kspt::printable_adapter concept is used to constrain a type to be printable judged by another character type. Because there are many different locale systems, it must have a overrule concept to decide what locale-related printable by another character base.
utx::kspt::printable_adapter
template <typename type1, typename type2> concept printable_adapter = ???;
type1 is the target type to be constrained, type2 is the locale-related character type. Currently only char and wchar_t are accepted to type2, as c++ standard has implmented std::cout for char based, and std::wcout for wchar_t based.
#include <utxcpp/core.hpp> template <utx::kspt::printable_adapter<char> type1> class fizz_buzz { public: fizz_buzz(const type1 & value1) { std::cout << value1 << std::endl; utx::print(value1); } }; int main() { fizz_buzz<int> f1{123}; fizz_buzz<std::string> f2{"Hello c++!"}; }