virtual int_type overflow(int_type c = T::eof());
If c
does not compare equal to T::
eof
()
, the protected virtual member function endeavors to insert the element
T::
to_char_type
(c)
into the output stream. It can do so in various ways:
If the function cannot succeed, it returns T::eof()
or throws an exception. Otherwise, it returns
T::
not_eof
(c)
. The default behavior is to return T::eof()
.