boost/units/derived_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_DERIVED_DIMENSION_HPP
  12 #define BOOST_UNITS_DERIVED_DIMENSION_HPP
  13
  14 #include <boost/units/dim.hpp>
  15 #include <boost/units/dimension.hpp>
  16 #include <boost/units/static_rational.hpp>
  17 #include <boost/units/units_fwd.hpp>
  18 #include <boost/units/detail/dimension_list.hpp>
  19
  20 namespace boost {
  21
  22 namespace units {
  23
  24 /// A utility class for defining composite dimensions with integer powers.
  25 template<class DT1 = dimensionless_type,long E1 = 0,
  26          class DT2 = dimensionless_type,long E2 = 0,
  27          class DT3 = dimensionless_type,long E3 = 0,
  28          class DT4 = dimensionless_type,long E4 = 0,
  29          class DT5 = dimensionless_type,long E5 = 0,
  30          class DT6 = dimensionless_type,long E6 = 0,
  31          class DT7 = dimensionless_type,long E7 = 0,
  32          class DT8 = dimensionless_type,long E8 = 0>
  33 struct derived_dimension
  34 {
  35 #ifdef BOOST_UNITS_DOXYGEN
  36     typedef detail::unspecified type;
  37 #else
  38     typedef typename
  39     make_dimension_list< list< dim< DT1,static_rational<E1> >,
  40                          list< dim< DT2,static_rational<E2> >,
  41                          list< dim< DT3,static_rational<E3> >,
  42                          list< dim< DT4,static_rational<E4> >,
  43                          list< dim< DT5,static_rational<E5> >,
  44                          list< dim< DT6,static_rational<E6> >,
  45                          list< dim< DT7,static_rational<E7> >,
  46                          list< dim< DT8,static_rational<E8> >, dimensionless_type > > > > > > > > >::type type;
  47 #endif
  48 };
  49
  50 /// INTERNAL ONLY
  51 template<class DT1,long E1>
  52 struct derived_dimension<
  53     DT1, E1,
  54     dimensionless_type,0,
  55     dimensionless_type,0,
  56     dimensionless_type,0,
  57     dimensionless_type,0,
  58     dimensionless_type,0,
  59     dimensionless_type,0,
  60     dimensionless_type,0>
  61 {
  62     typedef typename
  63     make_dimension_list< list< dim< DT1,static_rational<E1> >, dimensionless_type > >::type type;
  64 };
  65
  66 /// INTERNAL ONLY
  67 template<class DT1,long E1,
  68          class DT2,long E2>
  69 struct derived_dimension<
  70     DT1, E1,
  71     DT2, E2,
  72     dimensionless_type,0,
  73     dimensionless_type,0,
  74     dimensionless_type,0,
  75     dimensionless_type,0,
  76     dimensionless_type,0,
  77     dimensionless_type,0>
  78 {
  79     typedef typename
  80     make_dimension_list< list< dim< DT1,static_rational<E1> >,
  81                          list< dim< DT2,static_rational<E2> >, dimensionless_type > > >::type type;
  82 };
  83
  84 /// INTERNAL ONLY
  85 template<class DT1,long E1,
  86          class DT2,long E2,
  87          class DT3,long E3>
  88 struct derived_dimension<
  89     DT1, E1,
  90     DT2, E2,
  91     DT3, E3,
  92     dimensionless_type,0,
  93     dimensionless_type,0,
  94     dimensionless_type,0,
  95     dimensionless_type,0,
  96     dimensionless_type,0>
  97 {
  98     typedef typename
  99     make_dimension_list< list< dim< DT1,static_rational<E1> >,
 100                          list< dim< DT2,static_rational<E2> >,
 101                          list< dim< DT3,static_rational<E3> >, dimensionless_type > > > >::type type;
 102 };
 103
 104 /// INTERNAL ONLY
 105 template<class DT1,long E1,
 106          class DT2,long E2,
 107          class DT3,long E3,
 108          class DT4,long E4>
 109 struct derived_dimension<
 110     DT1, E1,
 111     DT2, E2,
 112     DT3, E3,
 113     DT4, E4,
 114     dimensionless_type,0,
 115     dimensionless_type,0,
 116     dimensionless_type,0,
 117     dimensionless_type,0>
 118 {
 119     typedef typename
 120     make_dimension_list< list< dim< DT1,static_rational<E1> >,
 121                          list< dim< DT2,static_rational<E2> >,
 122                          list< dim< DT3,static_rational<E3> >,
 123                          list< dim< DT4,static_rational<E4> >, dimensionless_type > > > > >::type type;
 124 };
 125
 126 /// INTERNAL ONLY
 127 template<class DT1,long E1,
 128          class DT2,long E2,
 129          class DT3,long E3,
 130          class DT4,long E4,
 131          class DT5,long E5>
 132 struct derived_dimension<
 133     DT1, E1,
 134     DT2, E2,
 135     DT3, E3,
 136     DT4, E4,
 137     DT5, E5,
 138     dimensionless_type,0,
 139     dimensionless_type,0,
 140     dimensionless_type,0>
 141 {
 142     typedef typename
 143     make_dimension_list< list< dim< DT1,static_rational<E1> >,
 144                          list< dim< DT2,static_rational<E2> >,
 145                          list< dim< DT3,static_rational<E3> >,
 146                          list< dim< DT4,static_rational<E4> >,
 147                          list< dim< DT5,static_rational<E5> >, dimensionless_type > > > > > >::type type;
 148 };
 149
 150 /// INTERNAL ONLY
 151 template<class DT1,long E1,
 152          class DT2,long E2,
 153          class DT3,long E3,
 154          class DT4,long E4,
 155          class DT5,long E5,
 156          class DT6,long E6>
 157 struct derived_dimension<
 158     DT1, E1,
 159     DT2, E2,
 160     DT3, E3,
 161     DT4, E4,
 162     DT5, E5,
 163     DT6, E6,
 164     dimensionless_type,0,
 165     dimensionless_type,0>
 166 {
 167     typedef typename
 168     make_dimension_list< list< dim< DT1,static_rational<E1> >,
 169                          list< dim< DT2,static_rational<E2> >,
 170                          list< dim< DT3,static_rational<E3> >,
 171                          list< dim< DT4,static_rational<E4> >,
 172                          list< dim< DT5,static_rational<E5> >,
 173                          list< dim< DT6,static_rational<E6> >, dimensionless_type > > > > > > >::type type;
 174 };
 175
 176 /// INTERNAL ONLY
 177 template<class DT1,long E1,
 178          class DT2,long E2,
 179          class DT3,long E3,
 180          class DT4,long E4,
 181          class DT5,long E5,
 182          class DT6,long E6,
 183          class DT7,long E7>
 184 struct derived_dimension<
 185     DT1, E1,
 186     DT2, E2,
 187     DT3, E3,
 188     DT4, E4,
 189     DT5, E5,
 190     DT6, E6,
 191     DT7, E7,
 192     dimensionless_type,0>
 193 {
 194     typedef typename
 195     make_dimension_list< list< dim< DT1,static_rational<E1> >,
 196                          list< dim< DT2,static_rational<E2> >,
 197                          list< dim< DT3,static_rational<E3> >,
 198                          list< dim< DT4,static_rational<E4> >,
 199                          list< dim< DT5,static_rational<E5> >,
 200                          list< dim< DT6,static_rational<E6> >,
 201                          list< dim< DT7,static_rational<E7> >, dimensionless_type > > > > > > > >::type type;
 202 };
 203
 204 } // namespace units
 205
 206 } // namespace boost
 207
 208 #endif // BOOST_UNITS_DERIVED_DIMENSION_HPP