Re: [Boost-users] [MultiArray, Intrusive] Instantiating a multi_array of intrusive lists as a class member

Subject: Re: [Boost-users] [MultiArray, Intrusive] Instantiating a multi_array of intrusive lists as a class member
From: Jiri Vyskocil (svzj_at_[hidden])
Date: 2012-12-14 08:02:40

On Sun, 2012-12-09 at 22:40 -0800, Jeffrey Lee Hellrung, Jr. wrote:

- See if a std::vector< boost::intrusive::list > works.
> 
This construction compiles and works with gcc 4.7.2 in C++11 mode only.
With wersion 4.7.2 in default mode and 4.6 in any mode, compilation
fails with a similar error.

- See if a boost::multi_array< boost::container::vector > works.
> 
This compiles and works fine in both 4.6 and 4.7, even in non-C++11 mode

If the above nesting of data structures gives similar errors as the
original combination (something about unavailability of a copy
constructor and/or stuff involving boost::rv<>), then that would seem to
confirm it's a Boost.Move + Boost.MultiArray incompatibility. At that
point, the best options are either to patch Boost.MultiArray to be
Boost.Move-aware (not sure how much work that would be...) or try gcc
4.7.x, where maybe Boost.Move would no longer have adverse effects (if
rvalue references are enabled by default; I don't know actually if
that's the case).
> 
GCC 4.7.2 won't compile the MultiArray of intrusive lists even in C++11
mode. It spews the same error as gcc 4.6 in C++0x mode:

/usr/include/boost/intrusive/list.hpp:1488:4: error:
‘boost::intrusive::list<T, O1, O2, O3>::list(const
boost::intrusive::list<T, O1, O2, O3>&) [with T = Particle, O1 =
boost::intrusive::none, O2 = boost::intrusive::none, O3 =
boost::intrusive::none, boost::intrusive::list<T, O1, O2, O3> =
boost::intrusive::list<Particle>]’ is private

It would be nice to have this working at least in the newer gcc, but I
have no idea what to look for...