How to return an fstream (C++0x)

Question

I think I\'ll get right into it and start with the code:

#include 
#include 
#include 

class test : public std:         


        

Answer 1

The problem is with this:

test(test&& old) {};

This lets you construct a new test from an rvalue test, yes, but it says nothing about your base, which is simply being default constructed (no open file). What you want is this:

test(test&& old) : std::ofstream(std::move(old)) {};

Which will move the stream from old into the base.