Re: [boost] [circular_buffer] why does the copy constructor not copy capacity

From: Stjepan Rajko (stipe_at_[hidden])
Date: 2008-04-23 21:10:29

On Wed, Apr 23, 2008 at 1:22 PM, Stjepan Rajko <stipe_at_[hidden]> wrote:
> Hello,
>
>  I've been finding the circular_buffer library very helpful (thanks for
>  a great lib!), but recently found the following behavior surprising
>  (this is using a recent svn trunk, if it matters):
>
>  boost::circular_buffer<int> one(3);
>  boost::circular_buffer<int> two(one);
>
>  std::cout<<one.capacity()<<std::endl;  // outputs 3
>  std::cout<<two.capacity()<<std::endl;  // outputs 0, I was expecting 3
>
>  Why does the copy constructor not copy the capacity?  It seems like
>  capacity is an essential property of circular_buffer, and as such I'd
>  expect it to be copied as a part of copy construction.
>

After looking at the code, it looks like this is a bug.  I submitted a
ticket with a guess at a patch:
http://svn.boost.org/trac/boost/ticket/1852

Stjepan