Hello all, does anyone know if Boost.Factory can be tweaked to use const& instead of references, e.g.: struct Bla { Bla(int n){} }; void Foo() { boost::factory fac; int i = 1; boost::scoped_ptr<KTestBase> ptr2(fac(i)); boost::scoped_ptr<KTestBase> ptr2(fac(2)); //compile error }