virtual protected member function
      charT do_widen (char c) const;
const char* do_widen (const char* low, const char* high, charT* to) const;

Widen character(s) [virtual]

Virtual protected member function in charge of transform char values to wide characters, as described in public member function widen (see ctype::widen for details).

Polymorphic derived classes can redefine the behavior of this function.

See also