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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
commit19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch)
tree42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/boost/libs/units/tutorial
parentInitial commit. (diff)
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Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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;
+}
+*/