Re: trouble using ifstream as a class member

[Gerald Kroisandt <gerald dot kroisandt at fcc dot chalmers dot se>]

Hello,

I am dealing with the same problem (libstdc++ 3.3 from SuSE 8.2).

The problem is that if one has a variable of type ifstream within a 
class, then the status-bits are not set to 0, if one even closes the 
file and then opens it again, i.e. if one has read the file until the 
eof-status-bit was set, then it does not help to write
  tis.close();
  tis.open(filename);
because the eof-bit is still set although tis.tellg() gives that it is 
at the beginning (in my code, I first tried with tis.seekg(0) to come to 
the beginning and then I saw that even closing and opening does not help 
at all)!

What might help (I have found this solution yesterday evening, but not 
tested totally) is:
  tis.close();
  tis.open(filename);
  tis.clear();

So, at least to write somewhere the command tis.clear() which sets all 
status-bits to 0 explicitely, but one must be careful not to use it too 
often!


This problem also occurs on IBM-machines, but not on a SUN!


Hope this helps,
Gerald