| // 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) |
| |
| #include <boost/test/minimal.hpp> |
| |
| #include <boost/units/base_dimension.hpp> |
| #include <boost/units/base_unit.hpp> |
| #include <boost/units/make_system.hpp> |
| #include <boost/units/scaled_base_unit.hpp> |
| #include <boost/units/conversion.hpp> |
| #include <boost/units/unit.hpp> |
| |
| struct dimension1_tag : boost::units::base_dimension<dimension1_tag, 1> {}; |
| struct dimension2_tag : boost::units::base_dimension<dimension2_tag, 2> {}; |
| |
| typedef dimension1_tag::dimension_type dimension1; |
| typedef dimension2_tag::dimension_type dimension2; |
| typedef boost::mpl::times<dimension1, dimension2>::type dimension12; |
| |
| struct unit1_tag : boost::units::base_unit<unit1_tag, dimension1, 1> {}; |
| struct unit2_tag : boost::units::base_unit<unit2_tag, dimension1, 2> {}; |
| struct unit3_tag : boost::units::base_unit<unit3_tag, dimension1, 3> {}; |
| struct unit4_tag : boost::units::base_unit<unit4_tag, dimension2, 4> {}; |
| struct unit5_tag : boost::units::base_unit<unit5_tag, dimension12, 5> {}; |
| struct unit6_tag : boost::units::base_unit<unit6_tag, dimension1, 6> {}; |
| struct unit7_tag : boost::units::base_unit<unit7_tag, dimension1, 7> {}; |
| |
| BOOST_UNITS_DEFINE_CONVERSION_FACTOR(unit1_tag, unit2_tag, double, 2.0); |
| BOOST_UNITS_DEFINE_CONVERSION_FACTOR(unit2_tag, unit3_tag, double, 3.0); |
| BOOST_UNITS_DEFINE_CONVERSION_FACTOR(unit6_tag, unit3_tag, double, 5.0); |
| BOOST_UNITS_DEFINE_CONVERSION_FACTOR(unit7_tag, unit1_tag, double, 7.0); |
| |
| typedef boost::units::multiply_typeof_helper<unit3_tag::unit_type, unit4_tag::unit_type>::type unit34_type; |
| BOOST_UNITS_DEFINE_CONVERSION_FACTOR(unit5_tag, unit34_type , double, 5.0); |
| |
| template<class BaseUnit> |
| struct make_unit { |
| typedef boost::units::unit< |
| typename BaseUnit::dimension_type, |
| typename boost::units::make_system<BaseUnit>::type> type; |
| }; |
| |
| BOOST_UNITS_DEFAULT_CONVERSION(unit1_tag, unit2_tag); |
| BOOST_UNITS_DEFAULT_CONVERSION(unit3_tag, unit2_tag); |
| BOOST_UNITS_DEFAULT_CONVERSION(unit5_tag, unit34_type); |
| BOOST_UNITS_DEFAULT_CONVERSION(unit6_tag, make_unit<unit3_tag>::type); |
| BOOST_UNITS_DEFAULT_CONVERSION(unit7_tag, make_unit<unit1_tag>::type); |
| |
| int test_main(int, char*[]) { |
| double value1 = boost::units::conversion_factor(unit3_tag::unit_type(), unit1_tag::unit_type()); |
| BOOST_CHECK(std::abs(value1 - 1.0/6.0) < .0000000001); |
| double value2 = boost::units::conversion_factor(unit5_tag::unit_type() / unit4_tag::unit_type(), unit1_tag::unit_type()); |
| BOOST_CHECK(std::abs(value2 - 5.0/6.0) < .0000000001); |
| typedef boost::units::scaled_base_unit<unit5_tag, boost::units::scale<2, boost::units::static_rational<1> > > scaled_unit5_tag; |
| double value3 = boost::units::conversion_factor(scaled_unit5_tag::unit_type() / unit4_tag::unit_type(), unit1_tag::unit_type()); |
| BOOST_CHECK(std::abs(value3 - 10.0/6.0) < .0000000001); |
| |
| // check homogeneous unit conversions |
| double value4 = boost::units::conversion_factor(make_unit<unit3_tag>::type(), make_unit<unit1_tag>::type()); |
| BOOST_CHECK(std::abs(value4 - 1.0/6.0) < .0000000001); |
| double value5 = boost::units::conversion_factor(unit3_tag::unit_type(), make_unit<unit1_tag>::type()); |
| BOOST_CHECK(std::abs(value5 - 1.0/6.0) < .0000000001); |
| double value6 = boost::units::conversion_factor(make_unit<unit3_tag>::type(), unit1_tag::unit_type()); |
| BOOST_CHECK(std::abs(value6 - 1.0/6.0) < .0000000001); |
| |
| // check chained homogeneous conversions |
| double value7 = boost::units::conversion_factor(unit6_tag::unit_type(), unit7_tag::unit_type()); |
| BOOST_CHECK(std::abs(value7 - 5.0/42.0) < .0000000001); |
| |
| return(0); |
| } |