Hi, On trunk there are currently two scoped enum emulation headers. One is the one that Beman wrote, in boost/detail/scoped_enum_emulation.hpp and the other is the one that Vicente has developed for the new version of Boost.Thread, in boost/thread/detail/scoped_enum.hpp It seems to me that it is a shame to have two implementations of the same thing in boost. Since Vicente's version provides additional facilities, I would therefore like to merge Vicente's code into the boost/detail header. We could retain the simple macros from Beman's header as wrappers for the more complex macros that Vicente has written. What do you think? Anthony -- Author of C++ Concurrency in Action http://www.stdthread.co.uk/book/ just::thread C++11 thread library http://www.stdthread.co.uk Just Software Solutions Ltd http://www.justsoftwaresolutions.co.uk 15 Carrallack Mews, St Just, Cornwall, TR19 7UL, UK. Company No. 5478976