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From: David Abrahams (dave_at_[hidden])
Date: 2005-06-12 12:18:55

"Gennadiy Rozental" <gennadiy.rozental_at_[hidden]> writes:

> "Jonathan Wakely" <cow_at_[hidden]> wrote in message
>> On Mon, Jun 06, 2005 at 10:57:02PM +0200, Janusz Piwowarski wrote:
>>> Hello all,
>>> I'm attaching a patch for ifstream_line_iterator_test regression
>>> failure. It's probably gcc bug (i test it for mingw 3.4.2, but i
>>> noticed same error in linux tests), because compiler generates
>>> copy constructor for temporary variables and never use it (for those
>>> who want to test it in linux environment i'm attaching minimal
>>> example).
>> If I understand you correctly, this is a bug in the code, not GCC:
> Yep. That'ts the "feature" preventing compilation (I still not sure why
> standard require copy constructor in this case). So now any temporary of
> noncopyable type couldn't participate in comparison operator. I've decided
> not to fight this. Let's just make them non-temporary.

CWG issue 391 (in ready status) requires direct binding and eliminates
the requirement for the accessible copy ctor. But no compilers have
been changed to implement this resolution yet. I know the GCC won't
make a move until the resolution is "written in stone."

Dave Abrahams
Boost Consulting

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