base_units/metric/year.hpp

0001 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
0002 // unit/quantity manipulation and conversion
0003 //
0004 // Copyright (C) 2003-2008 Matthias Christian Schabel
0005 // Copyright (C) 2007-2008 Steven Watanabe
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See
0008 // accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010
0011 #ifndef BOOST_UNIT_SYSTEMS_OTHER_YEAR_HPP_INCLUDED
0012 #define BOOST_UNIT_SYSTEMS_OTHER_YEAR_HPP_INCLUDED
0013
0014 #include <boost/units/scaled_base_unit.hpp>
0015 #include <boost/units/static_rational.hpp>
0016 #include <boost/units/scale.hpp>
0017 #include <boost/units/base_units/si/second.hpp>
0018
0019 // Julian year = 365.25 days exactly = 8766 hours exactly
0020
0021 namespace boost {
0022 namespace units {
0023 namespace metric {
0024
0025 typedef scaled_base_unit<boost::units::si::second_base_unit, scale<31557600, static_rational<1> > > year_base_unit;
0026
0027 }
0028
0029 template<>
0030 struct base_unit_info<metric::year_base_unit> {
0031     static BOOST_CONSTEXPR const char* name()   { return("Julian year"); }
0032     static BOOST_CONSTEXPR const char* symbol() { return("yr"); }
0033 };
0034
0035 }
0036 }
0037
0038 #endif