Defined in header <locale> explicit ctype( const mask* tbl = 0, bool del = false, std::size_t refs = 0);
Creates a std::ctype<char> facet and forwards the starting reference count refs to the base class constructor, locale::facet::facet().
If tbl is null, classic_table() is used by all classification member functions. Otherwise, tbl must be a pointer to the first element of an array of masks, at least std::ctype<char>::table_size in size, and that array is used