c++ getting the filename and path of an ofstream object

[zmohamed]

I'm passing an ofstream object to a function within my program. In that function, I'd like to extract the path and filename of the ofstream object, modify the filename only, create a new ofstream object using the old path and new filename and write something to it.

How do I get the path and filename of a passed ofstream object?

std::ostream& Func::writeOut(std::ostream& out)
{
   std::string sPath = getPath(out)     // how do I implement this?
   std::string sFile = sPath + "//NewFile";
 
   std::ofstream oFile(sFile, std::ios::out);
 
   sFile << "Write something" << std::endl;
 
   return(out);
}
 

[newb16]

You can't because ostream may be e.g. ostringstream that has no file associated with it.