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From: stephen@comp.lancs.ac.uk (Stephen J. Muir)
Newsgroups: net.lang.c++
Subject: Unnamed objects.
Message-ID: <636@comp.lancs.ac.uk>
Date: Fri, 7-Nov-86 15:20:32 EST
Article-I.D.: comp.636
Posted: Fri Nov  7 15:20:32 1986
Date-Received: Sun, 9-Nov-86 03:05:05 EST
Reply-To: stephen@comp.lancs.ac.uk (Stephen J. Muir)
Distribution: world
Organization: Department of Computing at Lancaster University, UK.
Lines: 27

I have defined a type to close a file automatically when it goes out of scope:

class auto_close
{   int	stored_fd;
public:
    auto_close (int fd)	{ stored_fd = fd; }
    ~auto_close ()	{ int e = errno; close (stored_fd); errno = e; }
};

Now, after opening a file:

fd = open ("file", 0)

I declare one of these:

auto_close my_close (fd);

The only problem is I have to think up a name (my_close) which I never use.  Is
there any way to get away with not having to think up a name?  If there isn't,
I think there should be!

BSD 4.2, VAX-11/750, C++ 1.1.
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