prefixes.hpp

来自「Boost provides free peer-reviewed portab」· HPP 代码 · 共 78 行

// 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) 2007-2008 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)

#ifndef BOOST_UNITS_SI_PREFIXES_HPP
#define BOOST_UNITS_SI_PREFIXES_HPP

#include <boost/units/static_constant.hpp>

#include <boost/units/make_scaled_unit.hpp>
#include <boost/units/systems/si/dimensionless.hpp>

namespace boost {

namespace units { 

namespace si {

#define BOOST_UNITS_METRIC_PREFIX(exponent, name)                                                       \
    typedef make_scaled_unit<dimensionless, scale<10, static_rational<exponent> > >::type name ## _type;\
    BOOST_UNITS_STATIC_CONSTANT(name, name ## _type)

BOOST_UNITS_METRIC_PREFIX(-24, yocto);
BOOST_UNITS_METRIC_PREFIX(-21, zepto);
BOOST_UNITS_METRIC_PREFIX(-18, atto);
BOOST_UNITS_METRIC_PREFIX(-15, femto);
BOOST_UNITS_METRIC_PREFIX(-12, pico);
BOOST_UNITS_METRIC_PREFIX(-9, nano);
BOOST_UNITS_METRIC_PREFIX(-6, micro);
BOOST_UNITS_METRIC_PREFIX(-3, milli);
BOOST_UNITS_METRIC_PREFIX(-2, centi);
BOOST_UNITS_METRIC_PREFIX(-1, deci);
BOOST_UNITS_METRIC_PREFIX(1, deka);
BOOST_UNITS_METRIC_PREFIX(2, hecto);
BOOST_UNITS_METRIC_PREFIX(3, kilo);
BOOST_UNITS_METRIC_PREFIX(6, mega);
BOOST_UNITS_METRIC_PREFIX(9, giga);
BOOST_UNITS_METRIC_PREFIX(12, tera);
BOOST_UNITS_METRIC_PREFIX(15, peta);
BOOST_UNITS_METRIC_PREFIX(18, exa);
BOOST_UNITS_METRIC_PREFIX(21, zetta);
BOOST_UNITS_METRIC_PREFIX(24, yotta);

/*BOOST_UNITS_STATIC_CONSTANT(yocto,long double) = (1e-24);       ///< metric prefix for 1.0e-24
BOOST_UNITS_STATIC_CONSTANT(zepto,long double) = (1e-21);       ///< metric prefix for 1.0e-21
BOOST_UNITS_STATIC_CONSTANT(atto,long double) = (1e-18);        ///< metric prefix for 1.0e-18
BOOST_UNITS_STATIC_CONSTANT(femto,long double) = (1e-15);       ///< metric prefix for 1.0e-15
BOOST_UNITS_STATIC_CONSTANT(pico,long double) = (1e-12);        ///< metric prefix for 1.0e-12
BOOST_UNITS_STATIC_CONSTANT(nano,long double) = (1e-9);         ///< metric prefix for 1.0e-9
BOOST_UNITS_STATIC_CONSTANT(micro,long double) = (1e-6);        ///< metric prefix for 1.0e-6
BOOST_UNITS_STATIC_CONSTANT(milli,long double) = (1e-3);        ///< metric prefix for 1.0e-3
BOOST_UNITS_STATIC_CONSTANT(centi,long double) = (1e-2);        ///< metric prefix for 1.0e-2
BOOST_UNITS_STATIC_CONSTANT(deci,long double) = (1e-1);         ///< metric prefix for 1.0e-1
BOOST_UNITS_STATIC_CONSTANT(deka,long double) = (1e1);          ///< metric prefix for 1.0e+1
BOOST_UNITS_STATIC_CONSTANT(hecto,long double) = (1e2);         ///< metric prefix for 1.0e+2
BOOST_UNITS_STATIC_CONSTANT(kilo,long double) = (1e3);          ///< metric prefix for 1.0e+3
BOOST_UNITS_STATIC_CONSTANT(mega,long double) = (1e6);          ///< metric prefix for 1.0e+6
BOOST_UNITS_STATIC_CONSTANT(giga,long double) = (1e9);          ///< metric prefix for 1.0e+9
BOOST_UNITS_STATIC_CONSTANT(tera,long double) = (1e12);         ///< metric prefix for 1.0e+12
BOOST_UNITS_STATIC_CONSTANT(peta,long double) = (1e15);         ///< metric prefix for 1.0e+15
BOOST_UNITS_STATIC_CONSTANT(exa,long double) = (1e18);          ///< metric prefix for 1.0e+18
BOOST_UNITS_STATIC_CONSTANT(zetta,long double) = (1e21);        ///< metric prefix for 1.0e+21
BOOST_UNITS_STATIC_CONSTANT(yotta,long double) = (1e24);        ///< metric prefix for 1.0e+24 */ 

} // namespace si

} // namespace units

} // namespace boost

#endif // BOOST_UNITS_SI_PREFIXES_HPP