[Boost-users] ct_if.hpp

Hi List, I was looking at the file boost/pending/detail/property.hpp and noted that boost::ct_if was used therein. I think this must have come from boost/pending/ct_if.hpp (but that header is not included?), which no longer exists in boost version 1.46.1. This is the only reference to boost::ct_if I can find within the boost distribution. I was wondering if this is just old code that is not used anywhere (any more), or if I am missing something?