595390497c
Ensuring that:
* it still works as before on C++98 and C++03
* C++11 "strict" constexpr is used where possible
- requires replacing { R x; return f(x); } with { return f(R()); }
* C++14 "relaxed" constexpr is used only where otherwise impossible
- assignment operators
- functions who's implementations require more than a single return
statement
111 lines
4.3 KiB
C++
111 lines
4.3 KiB
C++
// Boost.Units - A C++ library for zero-overhead dimensional analysis and
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// unit/quantity manipulation and conversion
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//
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// Copyright (C) 2003-2008 Matthias Christian Schabel
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// Copyright (C) 2008 Steven Watanabe
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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/**
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\file
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\brief test_conversion.cpp
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\details
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Test conversion between quantities.
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Output:
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@verbatim
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@endverbatim
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**/
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#include <boost/units/quantity.hpp>
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#include <boost/units/systems/si.hpp>
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#include <boost/units/systems/cgs.hpp>
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#include <iostream>
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#define BOOST_TEST_MAIN
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#include <boost/test/unit_test.hpp>
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#define BOOST_UNITS_CHECK_CLOSE(a, b) BOOST_CHECK_CLOSE_FRACTION(a, b, .0000001)
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namespace bu = boost::units;
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typedef bu::si::length si_length;
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typedef bu::si::time si_time;
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typedef bu::si::mass si_mass;
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typedef bu::si::area si_area;
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typedef bu::cgs::length cgs_length;
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typedef bu::cgs::time cgs_time;
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typedef bu::cgs::mass cgs_mass;
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typedef bu::cgs::area cgs_area;
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typedef bu::multiply_typeof_helper<si_length, cgs_length>::type mixed_length;
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typedef bu::multiply_typeof_helper<si_time, cgs_time>::type mixed_time;
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typedef bu::divide_typeof_helper<bu::multiply_typeof_helper<si_mass,cgs_area>::type, mixed_time>::type mixed_energy_1;
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typedef bu::divide_typeof_helper<bu::multiply_typeof_helper<cgs_mass,mixed_length>::type,
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bu::multiply_typeof_helper<cgs_time,cgs_time>::type >::type mixed_energy_2;
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BOOST_AUTO_TEST_CASE(test_conversion) {
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BOOST_CHECK_EQUAL(1, 1);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<mixed_length> a1(2.0 * mixed_length());
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BOOST_CONSTEXPR_OR_CONST bu::quantity<si_area> a2(a1);
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BOOST_UNITS_CHECK_CLOSE(a2.value(), .02);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<mixed_length> a3(a2);
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BOOST_UNITS_CHECK_CLOSE(a3.value(), 2.0);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<mixed_energy_1> e1(2.0 * mixed_energy_1());
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BOOST_CONSTEXPR_OR_CONST bu::quantity<mixed_energy_2> e2(e1);
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BOOST_UNITS_CHECK_CLOSE(e2.value(), 20.0);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::si::energy> e3(e1);
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BOOST_UNITS_CHECK_CLOSE(e3.value(), .0002);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<mixed_energy_2> e4(e3);
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BOOST_UNITS_CHECK_CLOSE(e4.value(), 20.0);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::cgs::force> F0 = 20 * bu::cgs::dyne;
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BOOST_UNITS_CHECK_CLOSE(F0.value(), 20.0);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::si::force> F3(F0);
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BOOST_UNITS_CHECK_CLOSE(F3.value(), 2.0e-4);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::si::force> F5(20 * bu::cgs::dyne);
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BOOST_UNITS_CHECK_CLOSE(F5.value(), 2.0e-4);
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// same type
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BOOST_CHECK_EQUAL(boost::units::conversion_factor(si_length(), si_length()), 1.0);
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}
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BOOST_AUTO_TEST_CASE(test_dimensionless_conversions) {
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typedef bu::divide_typeof_helper<bu::cgs::force, bu::si::force>::type mixed_dimensionless;
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::si::dimensionless> dimensionless_test1(1.0*bu::cgs::dyne/bu::si::newton);
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BOOST_CHECK(dimensionless_test1 == 1e-5);
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typedef bu::multiply_typeof_helper<bu::si::length, bu::cgs::length>::type m_cm;
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typedef bu::divide_typeof_helper<m_cm, m_cm>::type heterogeneous_dimensionless;
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BOOST_CONSTEXPR_OR_CONST bu::quantity<heterogeneous_dimensionless> dimensionless_test2(1.0*bu::cgs::dyne/bu::si::newton);
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BOOST_CHECK(dimensionless_test2.value() == 1e-5);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::divide_typeof_helper<bu::cgs::force, bu::si::force>::type> dimensionless_test3(dimensionless_test2);
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BOOST_UNITS_CHECK_CLOSE(dimensionless_test3.value(), 1.0);
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BOOST_UNITS_CHECK_CLOSE(boost::units::conversion_factor(mixed_dimensionless(), heterogeneous_dimensionless()), 1e-5);
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BOOST_UNITS_CHECK_CLOSE(boost::units::conversion_factor(heterogeneous_dimensionless(), mixed_dimensionless()), 1e5);
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//m/cm -> g/kg
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::divide_typeof_helper<bu::si::length, bu::cgs::length>::type> dimensionless_test4(2.0 * bu::si::meters / bu::cgs::centimeters);
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BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::divide_typeof_helper<bu::cgs::mass, bu::si::mass>::type> dimensionless_test5(dimensionless_test4);
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BOOST_UNITS_CHECK_CLOSE(dimensionless_test5.value(), 2e5);
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}
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