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 55