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Subject: [Boost-users] filesystem3::rename error codes
From: Andreas Haferburg (ahaferburg_at_[hidden])
Date: 2011-06-29 06:44:29


I was wondering how to handle errors of filesystem3::rename(). I'd like
to use the system::error_code& overload, but I can't seem to find out
how to use it. The documentation at [1] points to POSIX rename(), so I'm
guessing the error_code somehow corresponds to the POSIX rename() return
value. I'm not a native speaker, but I find the documentation pretty
vague here. The tutorial section [2] doesn't help either.

For example if the target file doesn't exist, the error_code.value() is
3. But I'm not supposed to use the constant 3 in the code, am I? Are
there any constants defined that correspond to these error code values?
What's the proper way to do the following:

TEST( BoostFilesystem3Test, testRenameFails )
   boost::system::error_code ec;
   boost::filesystem3::rename("c:/does/not/exist", "asdf", ec);
   ASSERT_EQ(3, ec.value());

I'm going to use QFile for now, but only because their documentation is
(slightly) better. I would like to use boost for as much as possible, so
an explanation or pointers to better documentation would be much
appreciated. Thank you.

Best regards

P.S. I accidentally sent this mail to the boost@ list before, sorry
about that.


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