namespace std {
template<class charT>
class numpunct_byname : public numpunct<charT> {
public:
using char_type = charT;
using string_type = basic_string<charT>;
explicit numpunct_byname(const char*, size_t refs = 0);
explicit numpunct_byname(const string&, size_t refs = 0);
protected:
~numpunct_byname();
};
}