Is it OK to use iostreams with int as character-type?

Question

When trying to come up with an answer to this question, I wrote this little test-program:

#include 
#include 
#include 

        

Answer 1

It works as expected.

I'm not sure what you are expecting...

Is this allowed?

That's probably not portable. Streams relies on char_traits and on facets which are defined in the standard only for char and wchar_t. An implementation can provides more, but my bet would be that you are relying on a minimal default implementation of those templates and not on a conscious implementation for int. I'd not be surprised that a more in depth use would leads to problems.