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
18namespace boost {
19namespace units {
20
21template<class Unit, class Scale>
22struct make_scaled_unit {
23 typedef typename make_scaled_unit<typename reduce_unit<Unit>::type, Scale>::type type;
24};
25
26template<class Dimension, class UnitList, class OldScale, class Scale>
27struct 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
43template<class Dimension, class UnitList, class OldScale, long Base>
44struct 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

source code of boost/boost/units/make_scaled_unit.hpp