[Boost-users] [mpl] compile time integer power

Hi All, This is a newbie mpl question, and here goes: How can evaluate integer powers using mpl? Such as, template < unsigned Pow, class Real > Real pow( Real r ) { return ; // the expression is compile time, // not the result of course. } int main() { float k = pow<6>(3.14f); return k; // just kidding :) } An also as a side question, is there a wrapper type container (or iterator?) that holds a given constant value (or type)? Such as, the aptly named "constant_wrapper" used below with fold algorithm, using namespace boost::mpl; const unsigned SIZE = 5; typedef fold < constant_wrapper< int_<-3>, SIZE> , int_<0> , plus<_,_>

::type number; BOOST_STATIC_ASSERT( number::value == -3*SIZE );

Thanks a lot