Re: [ublas] broken coordinate_matrix::sort with gcc 4.7 (was: patches for #7297, #7296, #6514, #6511 on trunk - please verify)

Subject: Re: [ublas] broken coordinate_matrix::sort with gcc 4.7 (was: patches for #7297, #7296, #6514, #6511 on trunk - please verify)
From: Thomas Klimpel (Thomas.Klimpel_at_[hidden])
Date: 2012-08-28 15:46:45

Gunter Winkler wrote:
> Looks like this hack does not work with gcc 4.7 any more. Maybe we can
> improve coordinate_matrix::sort() somehow to use the zip_iterator. (see
> storage_sparse.hpp:4396)

My conclusion in <http://lists.boost.org/MailArchives/ublas/2011/12/5123.php> was that we need an implementation of "std::inplace_merge" guaranteed to accept our iterators. Basically any existing implementation could be used, as long as the licensing conditions allow this.

As a side note, inplace_merge is cheating anyway, allocates temporary memory, and will only fall back to a true inplace_merge if this fails.

Regards,
Thomas