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// Boost.Units - A C++ library for zero-overhead dimensional analysis and
// unit/quantity manipulation and conversion
//
// Copyright (C) 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)
/**
\file
\brief test_custom_unit.cpp
\details
Make sure that a minimal + - * / unit class is fully functional.
Output:
@verbatim
@endverbatim
**/
#include <boost/units/quantity.hpp>
#include <boost/core/lightweight_test.hpp>
namespace bu = boost::units;
template<int Mass, int Length, int Time>
struct simple_unit {};
BOOST_TYPEOF_REGISTER_TEMPLATE(simple_unit, (int)(int)(int))
template<int Mass, int Length, int Time>
simple_unit<Mass, Length, Time> operator+(const simple_unit<Mass, Length, Time>&,
const simple_unit<Mass, Length, Time>&)
{
return simple_unit<Mass, Length, Time>();
}
template<int Mass, int Length, int Time>
simple_unit<Mass, Length, Time> operator-(const simple_unit<Mass, Length, Time>&,
const simple_unit<Mass, Length, Time>&)
{
return simple_unit<Mass, Length, Time>();
}
template<int Mass1, int Length1, int Time1, int Mass2, int Length2, int Time2>
simple_unit<Mass1 + Mass2, Length1 + Length2, Time1 + Time2>
operator*(const simple_unit<Mass1, Length1, Time1>&,
const simple_unit<Mass2, Length2, Time2>&)
{
return simple_unit<Mass1 + Mass2, Length1 + Length2, Time1 + Time2>();
}
template<int Mass1, int Length1, int Time1, int Mass2, int Length2, int Time2>
simple_unit<Mass1 - Mass2, Length1 - Length2, Time1 - Time2>
operator/(const simple_unit<Mass1, Length1, Time1>&,
const simple_unit<Mass2, Length2, Time2>&)
{
return simple_unit<Mass1 - Mass2, Length1 - Length2, Time1 - Time2>();
}
int main()
{
bu::quantity<simple_unit<1, 0, 0> > mass = bu::quantity<simple_unit<1, 0, 0> >::from_value(2);
bu::quantity<simple_unit<0, 1, 0> > length = bu::quantity<simple_unit<0, 1, 0> >::from_value(4);
bu::quantity<simple_unit<1, 1, 0> > ml = mass * length;
bu::quantity<simple_unit<1, -1, 0> > m_per_l = mass/length;
BOOST_TEST(ml.value() == 8);
BOOST_TEST(m_per_l.value() == 0.5);
mass += mass;
BOOST_TEST(mass.value() == 4);
length -= length;
BOOST_TEST(length.value() == 0);
return boost::report_errors();
}
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