virtual int pbackfail( int nCh );
Return Value
The nCh parameter if successful; otherwise EOF.
Parameter
nCh
The character used in a previous sputbackc call.
Remarks
This function is called by sputbackc if it fails, usually because the eback pointer equals the gptr pointer. The pbackfail function should deal with the situation, if possible, by such means as repositioning the external file pointer.
Default implementation
Returns EOF.
streambuf Overview | Stream Buffer Classes
See Also streambuf::sputbackc