1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and 2 // unit/quantity manipulation and conversion 3 // 4 // Copyright (C) 2003-2008 Matthias Christian Schabel 5 // Copyright (C) 2007-2008 Steven Watanabe 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See 8 // accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 11 #ifndef BOOST_UNITS_MAKE_SCALED_UNIT_HPP_INCLUDED 12 #define BOOST_UNITS_MAKE_SCALED_UNIT_HPP_INCLUDED 13 14 #include <boost/units/units_fwd.hpp> 15 #include <boost/units/heterogeneous_system.hpp> 16 #include <boost/units/unit.hpp> 17 18 namespace boost { 19 namespace units { 20 21 template<class Unit, class Scale> 22 struct make_scaled_unit { 23 typedef typename make_scaled_unit<typename reduce_unit<Unit>::type, Scale>::type type; 24 }; 25 26 template<class Dimension, class UnitList, class OldScale, class Scale> 27 struct make_scaled_unit<unit<Dimension, heterogeneous_system<heterogeneous_system_impl<UnitList, Dimension, OldScale> > >, Scale> { 28 typedef unit< 29 Dimension, 30 heterogeneous_system< 31 heterogeneous_system_impl< 32 UnitList, 33 Dimension, 34 typename mpl::times< 35 OldScale, 36 list<scale_list_dim<Scale>, dimensionless_type> 37 >::type 38 > 39 > 40 > type; 41 }; 42 43 template<class Dimension, class UnitList, class OldScale, long Base> 44 struct make_scaled_unit<unit<Dimension, heterogeneous_system<heterogeneous_system_impl<UnitList, Dimension, OldScale> > >, scale<Base, static_rational<0> > > { 45 typedef unit< 46 Dimension, 47 heterogeneous_system< 48 heterogeneous_system_impl< 49 UnitList, 50 Dimension, 51 OldScale 52 > 53 > 54 > type; 55 }; 56 57 } 58 } 59 60 #endif 61