Hi all, The new version of typeof library can be found at: http://groups.yahoo.com/group/boost/files/typeof.zip This version contains the following improvements: 1) The compilation speed is significantly improved for simple types by not instantiating unnecessary templates; 2) Support for integral template parameters has been added so that, for example, a template: template<class T, unsigned int ui, bool b, short s> class foo; can be registered like this: BOOST_REGISTER_TEMPLATE_X(foo, (class)(unsigned int)(bool)(short)); (_X stands for "extra" or "extended". Any naming improvement suggestions are welcome) A template parameter can be described as: class typename [unsigned] char [unsigned] short [unsigned] int [unsigned] long unsigned bool 3) The vector size limit is now controled by BOOST_TYPEOF_LIMIT_SIZE. If it is bigger than BOOST_MPL_LIMIT_VECTOR_SIZE, the additional vector definitions are generated automatically (using the method suggested and explained by Aleksey Gurtovoy). (There appears to be one more limitation that I wasn't aware of. It is related to the max number of template parameters allowed by the compiler. For example, VC7.1 appears to have a limit of 64) 4) All is compiled against current Boost CVS. Any comments are most welcome. Regards, Arkadiy