Overridden virtual functions

The base class basic_streambuf has several virtual functions that are to be overloaded by derived classes. They are:

• underflow()
• pbackfail()
• overflow()
• seekoff()
• seekpos()

• basic_stringbuf::underflow
  
  
• basic_stringbuf::pbackfail
  
  
• basic_stringbuf::overflow
  
  
• basic_stringbuf::seekoff
  
  
• basic_stringbuf::seekpos