I've been handed this problem:

    iostream::seekg does not clear the fail and eof bits
    when accessing a good position after a bad one.
    ie : if you seekg(0) after reaching the EOF, fail() and
    eof() remains true.

The relevent sections ([27.6.1.3], [27.5.2.4.2]) don't seem to speak to
this point.  (I'm probably looking in the wrong sections...)

Should seekg be clearing these bits?  I don't think so, but figured I'd
better ask.


Thanks for your time,
Phil

--
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Hi,
Phil Edwards (pedwards@dmapub.dma.org) wrote:
: Should seekg be clearing these bits?

My copy of the standard is pretty clear on what 'seekg()' is supposed
to do: "Effects: If fail() != true, executes rdbuf()->pubseekpos(pos)."
(27.6.1.3, the paragraph describing 'seekg()'). Also, it is put under
the section "unformatted input functions" and as such it starts out by
constructing a 'sentry' object and performs it's operation only if this
one yields 'true'. I can't see why 'seekg()' would reset any state
flags! In fact, it is supposed to be noop if the failbit or the badbit
is set...
--
<mailto:dietmar_kuehl@yahoo.com> <http://www.dietmar-kuehl.de/>
Phaidros eaSE - Easy Software Engineering: <http://www.phaidros.com/>

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Dietmar Kuehl <dietmar_kuehl@yahoo.com> wrote:
>
> I can't see why 'seekg()' would reset any state flags!

Great, because I couldn't either.  :-)


Thanks!
Phil

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