[Boost-users] [enable_if] Problem with conversion operator in VS2012

Hi all, I'm trying to follow the example given in http://www.boost.org/doc/libs/1_55_0/libs/utility/enable_if.html#sec:enable_... But VS2012 compiler gives: error C4519: default template arguments are only allowed on a class template Is this supposed to work with VS2012? Is there some other way to use enable_if in a conversion operator with VS2012? Thnaks!