| 1 | // Boost.Units - A C++ library for zero-overhead dimensional analysis and |
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| 2 | // unit/quantity manipulation and conversion |
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| 3 | // |
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| 4 | // Copyright (C) 2003-2008 Matthias Christian Schabel |
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| 5 | // Copyright (C) 2007-2008 Steven Watanabe |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 8 | // accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | |
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| 11 | /** |
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| 12 | \file |
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| 13 | |
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| 14 | \brief test_scaled_conversion.cpp |
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| 15 | |
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| 16 | \details |
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| 17 | Test unit scaling |
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| 18 | |
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| 19 | Output: |
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| 20 | @verbatim |
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| 21 | @endverbatim |
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| 22 | **/ |
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| 23 | |
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| 24 | #include <boost/units/quantity.hpp> |
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| 25 | #include <boost/units/conversion.hpp> |
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| 26 | #include <boost/units/unit.hpp> |
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| 27 | #include <boost/units/base_unit.hpp> |
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| 28 | #include <boost/units/scaled_base_unit.hpp> |
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| 29 | #include <boost/units/scale.hpp> |
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| 30 | #include <boost/units/base_dimension.hpp> |
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| 31 | #include <boost/units/derived_dimension.hpp> |
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| 32 | |
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| 33 | #include <boost/core/lightweight_test.hpp> |
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| 34 | |
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| 35 | #define BOOST_UNITS_CHECK_CLOSE(a, b) BOOST_TEST(std::abs((a) - (b)) < .0000001) |
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| 36 | |
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| 37 | namespace bu = boost::units; |
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| 38 | |
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| 39 | struct base_dimension1 : bu::base_dimension<base_dimension1, 1> {}; |
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| 40 | struct base_dimension2 : bu::base_dimension<base_dimension2, 2> {}; |
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| 41 | struct base_dimension3 : bu::base_dimension<base_dimension3, 3> {}; |
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| 42 | |
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| 43 | typedef bu::derived_dimension<base_dimension1, 1, base_dimension2, 1, base_dimension3, 1>::type dimension4; |
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| 44 | |
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| 45 | struct base_unit1 : bu::base_unit<base_unit1, base_dimension1::dimension_type, 1> {}; |
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| 46 | struct base_unit2 : bu::base_unit<base_unit2, base_dimension1::dimension_type, 2> {}; |
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| 47 | struct base_unit3 : bu::base_unit<base_unit3, base_dimension1::dimension_type, 3> {}; |
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| 48 | struct base_unit4 : bu::base_unit<base_unit4, dimension4, 4> {}; |
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| 49 | struct base_unit5 : bu::base_unit<base_unit5, base_dimension3::dimension_type, 5> {}; |
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| 50 | |
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| 51 | typedef bu::scaled_base_unit<base_unit2, bu::scale<10, bu::static_rational<3> > > scaled_base_unit2; |
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| 52 | typedef bu::scaled_base_unit<base_unit4, bu::scale<10, bu::static_rational<3> > > scaled_base_unit4; |
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| 53 | |
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| 54 | BOOST_UNITS_DEFINE_CONVERSION_FACTOR(base_unit1, scaled_base_unit2, double, 5); |
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| 55 | BOOST_UNITS_DEFINE_CONVERSION_FACTOR(scaled_base_unit2, base_unit3, double, 3); |
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| 56 | |
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| 57 | int main() |
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| 58 | { |
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| 59 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit1::unit_type(), base_unit2::unit_type()), 5000); |
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| 60 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit2::unit_type(), base_unit3::unit_type()), 0.003); |
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| 61 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(scaled_base_unit2::unit_type(), base_unit2::unit_type()), 1000); |
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| 62 | |
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| 63 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit4::unit_type()/base_unit5::unit_type(), scaled_base_unit4::unit_type()/base_unit5::unit_type()), 1e-3); |
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| 64 | |
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| 65 | return boost::report_errors(); |
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| 66 | } |
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| 67 | |
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