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// 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 <iostream>
#include <boost/units/units_fwd.hpp>
#include <boost/units/base_dimension.hpp>
#include <boost/units/base_unit.hpp>
#include <boost/units/derived_dimension.hpp>
#include <boost/units/make_system.hpp>
#include <boost/units/io.hpp>
#include <boost/units/quantity.hpp>
#include <boost/units/static_constant.hpp>
#include <boost/units/unit.hpp>
namespace boost {
namespace units {
struct length_base_dimension : boost::units::base_dimension<length_base_dimension,1> { }; ///> base dimension of length
struct time_base_dimension : boost::units::base_dimension<time_base_dimension,3> { }; ///> base dimension of time
typedef length_base_dimension::dimension_type length_dimension;
typedef time_base_dimension::dimension_type time_dimension;
struct length1_base_unit : base_unit<length1_base_unit,length_dimension,1>
{
static std::string name() { return "length 1"; }
static std::string symbol() { return "l1"; }
};
struct length2_base_unit : base_unit<length2_base_unit,length_dimension,2>
{
static std::string name() { return "length2"; }
static std::string symbol() { return "l2"; }
};
struct time1_base_unit : base_unit<time1_base_unit,time_dimension,3>
{
static std::string name() { return "time1"; }
static std::string symbol() { return "t1"; }
};
struct time2_base_unit : base_unit<time2_base_unit,time_dimension,4>
{
static std::string name() { return "time2"; }
static std::string symbol() { return "t2"; }
};
namespace s1 {
typedef make_system<length1_base_unit,time1_base_unit>::type system;
/// unit typedefs
typedef unit<dimensionless_type,system> dimensionless;
typedef unit<length_dimension,system> length;
typedef unit<time_dimension,system> time;
/// unit constants
BOOST_UNITS_STATIC_CONSTANT(length1,length);
BOOST_UNITS_STATIC_CONSTANT(time1,time);
} // namespace s1
namespace s2 {
typedef make_system<length2_base_unit,time2_base_unit>::type system;
/// unit typedefs
typedef unit<dimensionless_type,system> dimensionless;
typedef unit<length_dimension,system> length;
typedef unit<time_dimension,system> time;
/// unit constants
BOOST_UNITS_STATIC_CONSTANT(length2,length);
BOOST_UNITS_STATIC_CONSTANT(time2,time);
} // namespace s2
template<class X,class Y>
struct conversion_helper< quantity<s1::length,X>,quantity<s2::length,Y> >
{
static quantity<s2::length,Y> convert(const quantity<s1::length,X>& source)
{
return quantity<s2::length,Y>::from_value(2.5*source.value());
}
};
template<class X,class Y>
struct conversion_helper< quantity<s2::length,X>,quantity<s1::length,Y> >
{
static quantity<s1::length,Y> convert(const quantity<s2::length,X>& source)
{
return quantity<s1::length,Y>::from_value((1.0/2.5)*source.value());
}
};
template<class X,class Y>
struct conversion_helper< quantity<s1::time,X>,quantity<s2::time,Y> >
{
static quantity<s2::time,Y> convert(const quantity<s1::time,X>& source)
{
return quantity<s2::time,Y>::from_value(0.5*source.value());
}
};
} // namespace units
} // namespace boost
int main(void)
{
using namespace boost::units;
quantity<s1::length,float> l1(1.0*s1::length1);
quantity<s2::length,double> l2(1.5*l1);
quantity<s1::length,float> l3(2.0*l2/3.0);
quantity<s1::time,float> t1(1.0*s1::time1);
quantity<s2::time,double> t2(1.5*t1);
// quantity<s1::time,float> t3(2.0*t2/3.0);
return 0;
}
/*
// 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 <iostream>
#include <boost/units/units_fwd.hpp>
#include <boost/units/base_dimension.hpp>
#include <boost/units/base_unit.hpp>
#include <boost/units/derived_dimension.hpp>
#include <boost/units/make_system.hpp>
#include <boost/units/io.hpp>
#include <boost/units/quantity.hpp>
#include <boost/units/static_constant.hpp>
#include <boost/units/unit.hpp>
namespace boost {
namespace units {
struct length_base_dimension : boost::units::base_dimension<length_base_dimension,1> { }; ///> base dimension of length
struct mass_base_dimension : boost::units::base_dimension<mass_base_dimension,2> { }; ///> base dimension of mass
struct time_base_dimension : boost::units::base_dimension<time_base_dimension,3> { }; ///> base dimension of time
typedef length_base_dimension::dimension_type length_dimension;
typedef mass_base_dimension::dimension_type mass_dimension;
typedef time_base_dimension::dimension_type time_dimension;
struct centimeter_base_unit : base_unit<centimeter_base_unit,length_dimension,1>
{
static std::string name() { return "centimeter"; }
static std::string symbol() { return "cm"; }
};
struct gram_base_unit : base_unit<gram_base_unit,mass_dimension,2>
{
static std::string name() { return "gram"; }
static std::string symbol() { return "g"; }
};
struct second_base_unit : base_unit<second_base_unit,time_dimension,3>
{
static std::string name() { return "second"; }
static std::string symbol() { return "s"; }
};
namespace CG {
typedef make_system<centimeter_base_unit,gram_base_unit>::type system;
/// unit typedefs
typedef unit<dimensionless_type,system> dimensionless;
typedef unit<length_dimension,system> length;
typedef unit<mass_dimension,system> mass;
/// unit constants
BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
BOOST_UNITS_STATIC_CONSTANT(gram,mass);
} // namespace CG
namespace cgs {
typedef make_system<centimeter_base_unit,gram_base_unit,second_base_unit>::type system;
/// unit typedefs
typedef unit<dimensionless_type,system> dimensionless;
typedef unit<length_dimension,system> length;
typedef unit<mass_dimension,system> mass;
typedef unit<time_dimension,system> time;
/// unit constants
BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
BOOST_UNITS_STATIC_CONSTANT(gram,mass);
BOOST_UNITS_STATIC_CONSTANT(second,time);
} // namespace cgs
namespace esu {
typedef make_system<centimeter_base_unit,
gram_base_unit,
second_base_unit>::type system;
/// derived dimension for force in electrostatic units : L M T^-2
typedef derived_dimension<length_base_dimension,1,
mass_base_dimension,1,
time_base_dimension,-2>::type force_dimension;
/// derived dimension for charge in electrostatic units : L^3/2 M^1/2 T^-1
typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<3,2> >,
dim<mass_base_dimension,static_rational<1,2> >,
dim<time_base_dimension,static_rational<-1> > > >::type charge_dimension;
/// derived dimension for current in electrostatic units : L^3/2 M^1/2 T^-2
typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<3,2> >,
dim<mass_base_dimension,static_rational<1,2> >,
dim<time_base_dimension,static_rational<-2> > > >::type current_dimension;
/// derived dimension for electric potential in electrostatic units : L^1/2 M^1/2 T^-1
typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<1,2> >,
dim<mass_base_dimension,static_rational<1,2> >,
dim<time_base_dimension,static_rational<-1> > > >::type electric_potential_dimension;
/// derived dimension for electric field in electrostatic units : L^-1/2 M^1/2 T^-1
typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<-1,2> >,
dim<mass_base_dimension,static_rational<1,2> >,
dim<time_base_dimension,static_rational<-1> > > >::type electric_field_dimension;
/// unit typedefs
typedef unit<dimensionless_type,system> dimensionless;
typedef unit<length_dimension,system> length;
typedef unit<mass_dimension,system> mass;
typedef unit<time_dimension,system> time;
typedef unit<force_dimension,system> force;
typedef unit<charge_dimension,system> charge;
typedef unit<current_dimension,system> current;
typedef unit<electric_potential_dimension,system> electric_potential;
typedef unit<electric_field_dimension,system> electric_field;
/// unit constants
BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
BOOST_UNITS_STATIC_CONSTANT(gram,mass);
BOOST_UNITS_STATIC_CONSTANT(second,time);
BOOST_UNITS_STATIC_CONSTANT(dyne,force);
BOOST_UNITS_STATIC_CONSTANT(esu,charge);
BOOST_UNITS_STATIC_CONSTANT(statvolt,electric_potential);
} // namespace esu
template<class Y>
quantity<esu::force,Y> coulombLaw(const quantity<esu::charge,Y>& q1,
const quantity<esu::charge,Y>& q2,
const quantity<esu::length,Y>& r)
{
return q1*q2/(r*r);
}
} // namespace units
} // namespace boost
int main(void)
{
using namespace boost::units;
quantity<CG::length> cg_length(1.0*CG::centimeter);
quantity<cgs::length> cgs_length(1.0*cgs::centimeter);
std::cout << cg_length/cgs_length << std::endl;
std::cout << esu::gram*pow<2>(esu::centimeter/esu::second)/esu::esu << std::endl;
std::cout << esu::statvolt/esu::centimeter << std::endl;
quantity<esu::charge> q1 = 1.0*esu::esu,
q2 = 2.0*esu::esu;
quantity<esu::length> r = 1.0*esu::centimeter;
std::cout << coulombLaw(q1,q2,r) << std::endl;
std::cout << coulombLaw(q1,q2,cgs_length) << std::endl;
return 0;
}
*/
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