Is it written what state a fstream object is in when newly created?

Given:
 ifstream in;

 //??? Is there a test that indicates the file is not
 // attached to a Filebuff object

I would like to know this information so that I can perform a test
on a file stream to determine if it has been previously open (if it
has been open, then close the file and reopen a different file).

Thanks!
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Chris P. Randle wrote:
>
> Is it written what state a fstream object is in when newly created?
>
> Given:
>         ifstream in;
>
>         //??? Is there a test that indicates the file is not
>         // attached to a Filebuff object
>
> I would like to know this information so that I can perform a test
> on a file stream to determine if it has been previously open (if it
> has been open, then close the file and reopen a different file).

// ...

if (in.is_open()) {
    in.close();
}
in.open(name, mode, prot);

// ...


paul
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