e4bcde0076
potentially breaking changes : rename SI/CGS namespaces to lowercase remove some non-SI units (mostly obscure) move base_units into boost/units move physical_dimensions into boost/units improved base_units for non-SI [SVN r45508]
315 lines
10 KiB
C++
315 lines
10 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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#include <iostream>
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#include <boost/units/units_fwd.hpp>
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#include <boost/units/base_dimension.hpp>
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#include <boost/units/base_unit.hpp>
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#include <boost/units/derived_dimension.hpp>
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#include <boost/units/make_system.hpp>
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#include <boost/units/io.hpp>
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#include <boost/units/quantity.hpp>
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#include <boost/units/static_constant.hpp>
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#include <boost/units/unit.hpp>
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namespace boost {
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namespace units {
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struct length_base_dimension : boost::units::base_dimension<length_base_dimension,1> { }; ///> base dimension of length
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struct time_base_dimension : boost::units::base_dimension<time_base_dimension,3> { }; ///> base dimension of time
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typedef length_base_dimension::dimension_type length_dimension;
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typedef time_base_dimension::dimension_type time_dimension;
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struct length1_base_unit : base_unit<length1_base_unit,length_dimension,1>
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{
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static std::string name() { return "length 1"; }
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static std::string symbol() { return "l1"; }
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};
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struct length2_base_unit : base_unit<length2_base_unit,length_dimension,2>
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{
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static std::string name() { return "length2"; }
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static std::string symbol() { return "l2"; }
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};
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struct time1_base_unit : base_unit<time1_base_unit,time_dimension,3>
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{
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static std::string name() { return "time1"; }
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static std::string symbol() { return "t1"; }
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};
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struct time2_base_unit : base_unit<time2_base_unit,time_dimension,4>
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{
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static std::string name() { return "time2"; }
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static std::string symbol() { return "t2"; }
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};
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namespace s1 {
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typedef make_system<length1_base_unit,time1_base_unit>::type system;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<time_dimension,system> time;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(length1,length);
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BOOST_UNITS_STATIC_CONSTANT(time1,time);
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} // namespace s1
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namespace s2 {
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typedef make_system<length2_base_unit,time2_base_unit>::type system;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<time_dimension,system> time;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(length2,length);
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BOOST_UNITS_STATIC_CONSTANT(time2,time);
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} // namespace s2
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template<class X,class Y>
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struct conversion_helper< quantity<s1::length,X>,quantity<s2::length,Y> >
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{
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static quantity<s2::length,Y> convert(const quantity<s1::length,X>& source)
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{
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return quantity<s2::length,Y>::from_value(2.5*source.value());
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}
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};
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template<class X,class Y>
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struct conversion_helper< quantity<s2::length,X>,quantity<s1::length,Y> >
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{
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static quantity<s1::length,Y> convert(const quantity<s2::length,X>& source)
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{
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return quantity<s1::length,Y>::from_value((1.0/2.5)*source.value());
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}
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};
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template<class X,class Y>
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struct conversion_helper< quantity<s1::time,X>,quantity<s2::time,Y> >
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{
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static quantity<s2::time,Y> convert(const quantity<s1::time,X>& source)
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{
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return quantity<s2::time,Y>::from_value(0.5*source.value());
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}
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};
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} // namespace units
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} // namespace boost
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int main(void)
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{
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using namespace boost::units;
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quantity<s1::length,float> l1(1.0*s1::length1);
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quantity<s2::length,double> l2(1.5*l1);
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quantity<s1::length,float> l3(2.0*l2/3.0);
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quantity<s1::time,float> t1(1.0*s1::time1);
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quantity<s2::time,double> t2(1.5*t1);
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// quantity<s1::time,float> t3(2.0*t2/3.0);
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return 0;
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}
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/*
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// 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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#include <iostream>
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#include <boost/units/units_fwd.hpp>
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#include <boost/units/base_dimension.hpp>
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#include <boost/units/base_unit.hpp>
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#include <boost/units/derived_dimension.hpp>
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#include <boost/units/make_system.hpp>
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#include <boost/units/io.hpp>
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#include <boost/units/quantity.hpp>
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#include <boost/units/static_constant.hpp>
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#include <boost/units/unit.hpp>
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namespace boost {
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namespace units {
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struct length_base_dimension : boost::units::base_dimension<length_base_dimension,1> { }; ///> base dimension of length
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struct mass_base_dimension : boost::units::base_dimension<mass_base_dimension,2> { }; ///> base dimension of mass
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struct time_base_dimension : boost::units::base_dimension<time_base_dimension,3> { }; ///> base dimension of time
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typedef length_base_dimension::dimension_type length_dimension;
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typedef mass_base_dimension::dimension_type mass_dimension;
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typedef time_base_dimension::dimension_type time_dimension;
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struct centimeter_base_unit : base_unit<centimeter_base_unit,length_dimension,1>
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{
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static std::string name() { return "centimeter"; }
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static std::string symbol() { return "cm"; }
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};
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struct gram_base_unit : base_unit<gram_base_unit,mass_dimension,2>
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{
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static std::string name() { return "gram"; }
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static std::string symbol() { return "g"; }
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};
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struct second_base_unit : base_unit<second_base_unit,time_dimension,3>
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{
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static std::string name() { return "second"; }
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static std::string symbol() { return "s"; }
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};
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namespace CG {
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typedef make_system<centimeter_base_unit,gram_base_unit>::type system;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<mass_dimension,system> mass;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
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BOOST_UNITS_STATIC_CONSTANT(gram,mass);
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} // namespace CG
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namespace cgs {
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typedef make_system<centimeter_base_unit,gram_base_unit,second_base_unit>::type system;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<mass_dimension,system> mass;
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typedef unit<time_dimension,system> time;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
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BOOST_UNITS_STATIC_CONSTANT(gram,mass);
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BOOST_UNITS_STATIC_CONSTANT(second,time);
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} // namespace cgs
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namespace esu {
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typedef make_system<centimeter_base_unit,
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gram_base_unit,
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second_base_unit>::type system;
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/// derived dimension for force in electrostatic units : L M T^-2
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typedef derived_dimension<length_base_dimension,1,
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mass_base_dimension,1,
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time_base_dimension,-2>::type force_dimension;
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/// derived dimension for charge in electrostatic units : L^3/2 M^1/2 T^-1
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typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<3,2> >,
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dim<mass_base_dimension,static_rational<1,2> >,
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dim<time_base_dimension,static_rational<-1> > > >::type charge_dimension;
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/// derived dimension for current in electrostatic units : L^3/2 M^1/2 T^-2
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typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<3,2> >,
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dim<mass_base_dimension,static_rational<1,2> >,
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dim<time_base_dimension,static_rational<-2> > > >::type current_dimension;
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/// derived dimension for electric potential in electrostatic units : L^1/2 M^1/2 T^-1
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typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<1,2> >,
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dim<mass_base_dimension,static_rational<1,2> >,
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dim<time_base_dimension,static_rational<-1> > > >::type electric_potential_dimension;
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/// derived dimension for electric field in electrostatic units : L^-1/2 M^1/2 T^-1
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typedef make_dimension_list< mpl::list< dim<length_base_dimension,static_rational<-1,2> >,
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dim<mass_base_dimension,static_rational<1,2> >,
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dim<time_base_dimension,static_rational<-1> > > >::type electric_field_dimension;
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/// unit typedefs
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typedef unit<dimensionless_type,system> dimensionless;
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typedef unit<length_dimension,system> length;
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typedef unit<mass_dimension,system> mass;
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typedef unit<time_dimension,system> time;
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typedef unit<force_dimension,system> force;
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typedef unit<charge_dimension,system> charge;
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typedef unit<current_dimension,system> current;
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typedef unit<electric_potential_dimension,system> electric_potential;
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typedef unit<electric_field_dimension,system> electric_field;
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/// unit constants
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BOOST_UNITS_STATIC_CONSTANT(centimeter,length);
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BOOST_UNITS_STATIC_CONSTANT(gram,mass);
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BOOST_UNITS_STATIC_CONSTANT(second,time);
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BOOST_UNITS_STATIC_CONSTANT(dyne,force);
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BOOST_UNITS_STATIC_CONSTANT(esu,charge);
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BOOST_UNITS_STATIC_CONSTANT(statvolt,electric_potential);
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} // namespace esu
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template<class Y>
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quantity<esu::force,Y> coulombLaw(const quantity<esu::charge,Y>& q1,
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const quantity<esu::charge,Y>& q2,
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const quantity<esu::length,Y>& r)
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{
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return q1*q2/(r*r);
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}
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} // namespace units
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} // namespace boost
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int main(void)
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{
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using namespace boost::units;
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quantity<CG::length> cg_length(1.0*CG::centimeter);
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quantity<cgs::length> cgs_length(1.0*cgs::centimeter);
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std::cout << cg_length/cgs_length << std::endl;
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std::cout << esu::gram*pow<2>(esu::centimeter/esu::second)/esu::esu << std::endl;
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std::cout << esu::statvolt/esu::centimeter << std::endl;
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quantity<esu::charge> q1 = 1.0*esu::esu,
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q2 = 2.0*esu::esu;
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quantity<esu::length> r = 1.0*esu::centimeter;
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std::cout << coulombLaw(q1,q2,r) << std::endl;
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std::cout << coulombLaw(q1,q2,cgs_length) << std::endl;
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return 0;
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}
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*/
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