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+// Boost.Units - A C++ library for zero-overhead dimensional analysis and
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2008 Steven Watanabe
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_UNITS_GET_DIMENSION_HPP
+#define BOOST_UNITS_GET_DIMENSION_HPP
+
+///
+/// \file
+/// \brief Get the dimension of a unit, absolute unit and quantity.
+/// \details
+///
+
+#include <boost/units/units_fwd.hpp>
+
+namespace boost {
+
+namespace units {
+
+template<class T>
+struct get_dimension {};
+
+/// Get the dimension of a unit.
+template<class Dim,class System>
+struct get_dimension< unit<Dim,System> >
+{
+ typedef Dim type;
+};
+
+/// Get the dimension of an absolute unit.
+template<class Unit>
+struct get_dimension< absolute<Unit> >
+{
+ typedef typename get_dimension<Unit>::type type;
+};
+
+/// Get the dimension of a quantity.
+template<class Unit,class Y>
+struct get_dimension< quantity<Unit,Y> >
+{
+ typedef typename get_dimension<Unit>::type type;
+};
+
+} // namespace units
+
+} // namespace boost
+
+#endif // BOOST_UNITS_GET_DIMENSION_HPP