ceph/src/boost/libs/units/include/boost/units/get_dimension.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) 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_GET_DIMENSION_HPP
  12 #define BOOST_UNITS_GET_DIMENSION_HPP
  13
  14 ///
  15 /// \file
  16 /// \brief Get the dimension of a unit, absolute unit and quantity.
  17 /// \details
  18 ///
  19
  20 #include <boost/units/units_fwd.hpp>
  21
  22 namespace boost {
  23
  24 namespace units {
  25
  26 template<class T>
  27 struct get_dimension {};
  28
  29 /// Get the dimension of a unit.
  30 template<class Dim,class System>
  31 struct get_dimension< unit<Dim,System> >
  32 {
  33     typedef Dim type;
  34 };
  35
  36 /// Get the dimension of an absolute unit.
  37 template<class Unit>
  38 struct get_dimension< absolute<Unit> >
  39 {
  40     typedef typename get_dimension<Unit>::type  type;
  41 };
  42
  43 /// Get the dimension of a quantity.
  44 template<class Unit,class Y>
  45 struct get_dimension< quantity<Unit,Y> >
  46 {
  47     typedef typename get_dimension<Unit>::type  type;
  48 };
  49
  50 } // namespace units
  51
  52 } // namespace boost
  53
  54 #endif // BOOST_UNITS_GET_DIMENSION_HPP