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) 2007-2008 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 | /** |
12 | \file |
13 | |
14 | \brief test_scaled_conversion.cpp |
15 | |
16 | \details |
17 | Test unit scaling |
18 | |
19 | Output: |
20 | @verbatim |
21 | @endverbatim |
22 | **/ |
23 | |
24 | #include <boost/units/quantity.hpp> |
25 | #include <boost/units/conversion.hpp> |
26 | #include <boost/units/unit.hpp> |
27 | #include <boost/units/base_unit.hpp> |
28 | #include <boost/units/scaled_base_unit.hpp> |
29 | #include <boost/units/scale.hpp> |
30 | #include <boost/units/base_dimension.hpp> |
31 | #include <boost/units/derived_dimension.hpp> |
32 | |
33 | #include <boost/core/lightweight_test.hpp> |
34 | |
35 | #define BOOST_UNITS_CHECK_CLOSE(a, b) BOOST_TEST(std::abs((a) - (b)) < .0000001) |
36 | |
37 | namespace bu = boost::units; |
38 | |
39 | struct base_dimension1 : bu::base_dimension<base_dimension1, 1> {}; |
40 | struct base_dimension2 : bu::base_dimension<base_dimension2, 2> {}; |
41 | struct base_dimension3 : bu::base_dimension<base_dimension3, 3> {}; |
42 | |
43 | typedef bu::derived_dimension<base_dimension1, 1, base_dimension2, 1, base_dimension3, 1>::type dimension4; |
44 | |
45 | struct base_unit1 : bu::base_unit<base_unit1, base_dimension1::dimension_type, 1> {}; |
46 | struct base_unit2 : bu::base_unit<base_unit2, base_dimension1::dimension_type, 2> {}; |
47 | struct base_unit3 : bu::base_unit<base_unit3, base_dimension1::dimension_type, 3> {}; |
48 | struct base_unit4 : bu::base_unit<base_unit4, dimension4, 4> {}; |
49 | struct base_unit5 : bu::base_unit<base_unit5, base_dimension3::dimension_type, 5> {}; |
50 | |
51 | typedef bu::scaled_base_unit<base_unit2, bu::scale<10, bu::static_rational<3> > > scaled_base_unit2; |
52 | typedef bu::scaled_base_unit<base_unit4, bu::scale<10, bu::static_rational<3> > > scaled_base_unit4; |
53 | |
54 | BOOST_UNITS_DEFINE_CONVERSION_FACTOR(base_unit1, scaled_base_unit2, double, 5); |
55 | BOOST_UNITS_DEFINE_CONVERSION_FACTOR(scaled_base_unit2, base_unit3, double, 3); |
56 | |
57 | int main() |
58 | { |
59 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit1::unit_type(), base_unit2::unit_type()), 5000); |
60 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit2::unit_type(), base_unit3::unit_type()), 0.003); |
61 | BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(scaled_base_unit2::unit_type(), base_unit2::unit_type()), 1000); |
62 | |
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); |
64 | |
65 | return boost::report_errors(); |
66 | } |
67 | |