0b6a182c
 Hu Chunming
添加无鉴权注册和注销
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// ratio_fwd.hpp ---------------------------------------------------------------//
// Copyright 2008 Howard Hinnant
// Copyright 2008 Beman Dawes
// Copyright 2009 Vicente J. Botet Escriba
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
/*
This code was derived by Beman Dawes from Howard Hinnant's time2_demo prototype.
Many thanks to Howard for making his code available under the Boost license.
The original code was modified to conform to Boost conventions and to section
20.4 Compile-time rational arithmetic [ratio], of the C++ committee working
paper N2798.
See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2798.pdf.
time2_demo contained this comment:
Much thanks to Andrei Alexandrescu,
Walter Brown,
Peter Dimov,
Jeff Garland,
Terry Golubiewski,
Daniel Krugler,
Anthony Williams.
*/
// The way overflow is managed for ratio_less is taken from llvm/libcxx/include/ratio
#ifndef BOOST_RATIO_RATIO_FWD_HPP
#define BOOST_RATIO_RATIO_FWD_HPP
#include <boost/ratio/config.hpp>
#if defined(__GNUC__) && (__GNUC__ >= 4)
#pragma GCC system_header
#endif
namespace boost
{
//----------------------------------------------------------------------------//
// //
// 20.6 Compile-time rational arithmetic [ratio] //
// //
//----------------------------------------------------------------------------//
// ratio
template <boost::intmax_t N, boost::intmax_t D = 1> class ratio;
// ratio arithmetic
template <class R1, class R2> struct ratio_add;
template <class R1, class R2> struct ratio_subtract;
template <class R1, class R2> struct ratio_multiply;
template <class R1, class R2> struct ratio_divide;
#ifdef BOOST_RATIO_EXTENSIONS
template <class R1, class R2> struct ratio_gcd;
template <class R1, class R2> struct ratio_lcm;
template <class R> struct ratio_negate;
template <class R> struct ratio_abs;
template <class R> struct ratio_sign;
template <class R, int P> struct ratio_power;
#endif
// ratio comparison
template <class R1, class R2> struct ratio_equal;
template <class R1, class R2> struct ratio_not_equal;
template <class R1, class R2> struct ratio_less;
template <class R1, class R2> struct ratio_less_equal;
template <class R1, class R2> struct ratio_greater;
template <class R1, class R2> struct ratio_greater_equal;
// convenience SI typedefs
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000000000)> atto;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000000)> femto;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000)> pico;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000)> nano;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000)> micro;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000)> milli;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(100)> centi;
typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(10)> deci;
typedef ratio< BOOST_RATIO_INTMAX_C(10), BOOST_RATIO_INTMAX_C(1)> deca;
typedef ratio< BOOST_RATIO_INTMAX_C(100), BOOST_RATIO_INTMAX_C(1)> hecto;
typedef ratio< BOOST_RATIO_INTMAX_C(1000), BOOST_RATIO_INTMAX_C(1)> kilo;
typedef ratio< BOOST_RATIO_INTMAX_C(1000000), BOOST_RATIO_INTMAX_C(1)> mega;
typedef ratio< BOOST_RATIO_INTMAX_C(1000000000), BOOST_RATIO_INTMAX_C(1)> giga;
typedef ratio< BOOST_RATIO_INTMAX_C(1000000000000), BOOST_RATIO_INTMAX_C(1)> tera;
typedef ratio< BOOST_RATIO_INTMAX_C(1000000000000000), BOOST_RATIO_INTMAX_C(1)> peta;
typedef ratio<BOOST_RATIO_INTMAX_C(1000000000000000000), BOOST_RATIO_INTMAX_C(1)> exa;
#ifdef BOOST_RATIO_EXTENSIONS
#define BOOST_RATIO_1024 BOOST_RATIO_INTMAX_C(1024)
// convenience IEC typedefs
typedef ratio< BOOST_RATIO_1024> kibi;
typedef ratio< BOOST_RATIO_1024*BOOST_RATIO_1024> mebi;
typedef ratio< BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> gibi;
typedef ratio< BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> tebi;
typedef ratio< BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> pebi;
typedef ratio<BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024*BOOST_RATIO_1024> exbi;
#endif
} // namespace boost
#endif // BOOST_RATIO_HPP
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