Re: [Boost-users] [enable_if][type_traits] Overload resolutionquestion

"Michael Marcin" <mmarcin@method-solutions.com> writes:

Thank you. It works and makes sense now because of your explanations. I've been working for a year now using C++ almost exclusively and there is still so much left to learn *sigh*.

You're welcome. James Dennett reminded me off-list that there's a trick for doing power-of-2 detection: (n>0 and (n&(n-1))==0) // something like this template <class N> struct is_power_of_2 : mpl::and< mpl::greater<N,mpl::int_<0> > , mpl::equal_to< typename mpl::bitand< N , typename mpl::prior<N>::type >::type , mpl::int<0> > > {}; -- Dave Abrahams Boost Consulting www.boost-consulting.com