Hi Boost, a new visualizer for boost::optional was just added to http://svn.boost.org/trac/boost/wiki/DebuggerVisualizers#NativeCDebuggerVisu... As always, the current visualizers can be checked out from the following url: https://svn.boost.org/svn/boost/sandbox/boost_docs/subprojects/DebuggerVisua... Thanks to Daniel Krügler for this one, and my apologies for the delay. Cheers, Filip