ceph/src/boost/boost/units/make_scaled_unit.hpp

   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