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diff --git a/src/boost/libs/units/example/quaternion.cpp b/src/boost/libs/units/example/quaternion.cpp
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+// Boost.Units - A C++ library for zero-overhead dimensional analysis and
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2007-2008 Steven Watanabe
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+/**
+\file
+
+\brief quaternion.cpp
+
+\details
+Demonstrate interoperability with Boost.Quaternion.
+
+Output:
+@verbatim
+
+//[quaternion_output_1
++L = (4,3,2,1) m
+-L = (-4,-3,-2,-1) m
+L+L = (8,6,4,2) m
+L-L = (0,0,0,0) m
+L*L = (2,24,16,8) m^2
+L/L = (1,0,0,0) dimensionless
+L^3 = (-104,102,68,34) m^3
+//]
+
+//[quaternion_output_2
++L = (4 m,3 m,2 m,1 m)
+-L = (-4 m,-3 m,-2 m,-1 m)
+L+L = (8 m,6 m,4 m,2 m)
+L-L = (0 m,0 m,0 m,0 m)
+L^3 = (-104 m^3,102 m^3,68 m^3,34 m^3)
+//]
+
+@endverbatim
+**/
+
+#include <iostream>
+
+#include <boost/math/quaternion.hpp>
+#include <boost/mpl/list.hpp>
+
+#include <boost/units/pow.hpp>
+#include <boost/units/quantity.hpp>
+#include <boost/units/io.hpp>
+
+#include "test_system.hpp"
+
+#if BOOST_UNITS_HAS_BOOST_TYPEOF
+
+#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
+
+BOOST_TYPEOF_REGISTER_TEMPLATE(boost::math::quaternion, 1)
+
+#endif
+
+namespace boost {
+
+namespace units {
+
+//[quaternion_class_snippet_1a
+/// specialize power typeof helper
+template<class Y,long N,long D>
+struct power_typeof_helper<boost::math::quaternion<Y>,static_rational<N,D> >
+{
+ // boost::math::quaternion only supports integer powers
+ BOOST_STATIC_ASSERT(D==1);
+
+ typedef boost::math::quaternion<
+ typename power_typeof_helper<Y,static_rational<N,D> >::type
+ > type;
+
+ static type value(const boost::math::quaternion<Y>& x)
+ {
+ return boost::math::pow(x,static_cast<int>(N));
+ }
+};
+//]
+
+//[quaternion_class_snippet_1b
+/// specialize root typeof helper
+template<class Y,long N,long D>
+struct root_typeof_helper<boost::math::quaternion<Y>,static_rational<N,D> >
+{
+ // boost::math::quaternion only supports integer powers
+ BOOST_STATIC_ASSERT(N==1);
+
+ typedef boost::math::quaternion<
+ typename root_typeof_helper<Y,static_rational<N,D> >::type
+ > type;
+
+ static type value(const boost::math::quaternion<Y>& x)
+ {
+ return boost::math::pow(x,static_cast<int>(D));
+ }
+};
+//]
+
+//[quaternion_class_snippet_2a
+/// specialize power typeof helper for quaternion<quantity<Unit,Y> >
+template<class Unit,long N,long D,class Y>
+struct power_typeof_helper<
+ boost::math::quaternion<quantity<Unit,Y> >,
+ static_rational<N,D> >
+{
+ typedef typename power_typeof_helper<
+ Y,
+ static_rational<N,D>
+ >::type value_type;
+
+ typedef typename power_typeof_helper<
+ Unit,
+ static_rational<N,D>
+ >::type unit_type;
+
+ typedef quantity<unit_type,value_type> quantity_type;
+ typedef boost::math::quaternion<quantity_type> type;
+
+ static type value(const boost::math::quaternion<quantity<Unit,Y> >& x)
+ {
+ const boost::math::quaternion<value_type> tmp =
+ pow<static_rational<N,D> >(boost::math::quaternion<Y>(
+ x.R_component_1().value(),
+ x.R_component_2().value(),
+ x.R_component_3().value(),
+ x.R_component_4().value()));
+
+ return type(quantity_type::from_value(tmp.R_component_1()),
+ quantity_type::from_value(tmp.R_component_2()),
+ quantity_type::from_value(tmp.R_component_3()),
+ quantity_type::from_value(tmp.R_component_4()));
+ }
+};
+//]
+
+//[quaternion_class_snippet_2b
+/// specialize root typeof helper for quaternion<quantity<Unit,Y> >
+template<class Unit,long N,long D,class Y>
+struct root_typeof_helper<
+ boost::math::quaternion<quantity<Unit,Y> >,
+ static_rational<N,D> >
+{
+ typedef typename root_typeof_helper<
+ Y,
+ static_rational<N,D>
+ >::type value_type;
+
+ typedef typename root_typeof_helper<
+ Unit,
+ static_rational<N,D>
+ >::type unit_type;
+
+ typedef quantity<unit_type,value_type> quantity_type;
+ typedef boost::math::quaternion<quantity_type> type;
+
+ static type value(const boost::math::quaternion<quantity<Unit,Y> >& x)
+ {
+ const boost::math::quaternion<value_type> tmp =
+ root<static_rational<N,D> >(boost::math::quaternion<Y>(
+ x.R_component_1().value(),
+ x.R_component_2().value(),
+ x.R_component_3().value(),
+ x.R_component_4().value()));
+
+ return type(quantity_type::from_value(tmp.R_component_1()),
+ quantity_type::from_value(tmp.R_component_2()),
+ quantity_type::from_value(tmp.R_component_3()),
+ quantity_type::from_value(tmp.R_component_4()));
+ }
+};
+//]
+
+} // namespace units
+
+} // namespace boost
+
+int main(void)
+{
+ using boost::math::quaternion;
+ using namespace boost::units;
+ using namespace boost::units::test;
+ using boost::units::pow;
+
+ {
+ //[quaternion_snippet_1
+ typedef quantity<length,quaternion<double> > length_dimension;
+
+ length_dimension L(quaternion<double>(4.0,3.0,2.0,1.0)*meters);
+ //]
+
+ std::cout << "+L = " << +L << std::endl
+ << "-L = " << -L << std::endl
+ << "L+L = " << L+L << std::endl
+ << "L-L = " << L-L << std::endl
+ << "L*L = " << L*L << std::endl
+ << "L/L = " << L/L << std::endl
+ // unfortunately, without qualification msvc still
+ // finds boost::math::pow by ADL.
+ << "L^3 = " << boost::units::pow<3>(L) << std::endl
+// << "L^(3/2) = " << pow< static_rational<3,2> >(L) << std::endl
+// << "3vL = " << root<3>(L) << std::endl
+// << "(3/2)vL = " << root< static_rational<3,2> >(L) << std::endl
+ << std::endl;
+ }
+
+ {
+ //[quaternion_snippet_2
+ typedef quaternion<quantity<length> > length_dimension;
+
+ length_dimension L(4.0*meters,3.0*meters,2.0*meters,1.0*meters);
+ //]
+
+ std::cout << "+L = " << +L << std::endl
+ << "-L = " << -L << std::endl
+ << "L+L = " << L+L << std::endl
+ << "L-L = " << L-L << std::endl
+// << "L*L = " << L*L << std::endl
+// << "L/L = " << L/L << std::endl
+ << "L^3 = " << boost::units::pow<3>(L) << std::endl
+// << "L^(3/2) = " << pow< static_rational<3,2> >(L) << std::endl
+// << "3vL = " << root<3>(L) << std::endl
+// << "(3/2)vL = " << root< static_rational<3,2> >(L) << std::endl
+ << std::endl;
+ }
+
+ return 0;
+}
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