boost/units/reduce_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_REDUCE_UNIT_HPP_INCLUDED
  12 #define BOOST_UNITS_REDUCE_UNIT_HPP_INCLUDED
  13
  14 namespace boost {
  15 namespace units {
  16
  17 #ifdef BOOST_UNITS_DOXYGEN
  18
  19 /// Returns a unique type for every unit.
  20 template<class Unit>
  21 struct reduce_unit {
  22     typedef detail::unspecified type;
  23 };
  24
  25 #else
  26
  27 // default implementation: return Unit unchanged.
  28 template<class Unit>
  29 struct reduce_unit {
  30     typedef Unit type;
  31 };
  32
  33 #endif
  34
  35 }
  36 }
  37
  38 #endif