<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I've been using the strategy I outlined last month ( <a href="http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2011-December/003226.html">http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2011-December/003226.html</a> ) for some time now. It is pretty similar to Jelmer's, but makes sure that R owns the object when a C++ class wrapped into an S4 class. Note that the copy constructor must be shallow. I am interested in feedback.<br><div><br></div><div>Ian</div></body></html>