[Boost-users] [boost][circular_buffer] problem using copy contructor

28 Feb 2007

      Hello,

I'm new to circular_buffer. After reading the documentation i expect the 
following should work:

const int c = 5;
boost::circular_buffer<int> cb1(c);
assert(cb1.capacity() == c);

boost::circular_buffer<int> cb2(cb1);
assert(cb2.capacity() == c); //failed, capacity() returns 0

But it does'nt work. After looking into the code of circular_buffer, i 
think the copy c'tor should be changed into something like this:

circular_buffer(const circular_buffer& cb)
: m_size(cb.size()), m_alloc(cb.get_allocator()) {
   initialize(cb.capacity());
   BOOST_TRY {
     cb_details::uninitialized_copy(cb.begin(), cb.end(), m_buff, m_alloc);
   } BOOST_CATCH(...) {
     deallocate(m_buff, cb.capacity());
     BOOST_RETHROW
   }
   BOOST_CATCH_END
}

Or do i missunderstand the documentation?
I'm using vs2003 and the latest version of circular_buffer from 
boost-sandbox in ordinary debug mode.

Thanks.

Andreas Rose