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89 lines
3.8 KiB
89 lines
3.8 KiB
// ratio_fwd.hpp ---------------------------------------------------------------// |
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// Copyright 2008 Howard Hinnant |
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// Copyright 2008 Beman Dawes |
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// Copyright 2009 Vicente J. Botet Escriba |
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// Distributed under the Boost Software License, Version 1.0. |
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// See http://www.boost.org/LICENSE_1_0.txt |
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/* |
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This code was derived by Beman Dawes from Howard Hinnant's time2_demo prototype. |
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Many thanks to Howard for making his code available under the Boost license. |
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The original code was modified to conform to Boost conventions and to section |
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20.4 Compile-time rational arithmetic [ratio], of the C++ committee working |
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paper N2798. |
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See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2798.pdf. |
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time2_demo contained this comment: |
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Much thanks to Andrei Alexandrescu, |
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Walter Brown, |
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Peter Dimov, |
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Jeff Garland, |
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Terry Golubiewski, |
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Daniel Krugler, |
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Anthony Williams. |
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*/ |
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// The way overflow is managed for ratio_less is taken from llvm/libcxx/include/ratio |
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#ifndef BOOST_RATIO_RATIO_FWD_HPP |
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#define BOOST_RATIO_RATIO_FWD_HPP |
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#include <boost/cstdint.hpp> |
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#ifdef INTMAX_C |
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#define BOOST_RATIO_INTMAX_C(a) INTMAX_C(a) |
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#else |
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#define BOOST_RATIO_INTMAX_C(a) a##LL |
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#endif |
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namespace boost |
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{ |
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//----------------------------------------------------------------------------// |
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// // |
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// 20.6 Compile-time rational arithmetic [ratio] // |
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// // |
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//----------------------------------------------------------------------------// |
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// ratio |
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template <boost::intmax_t N, boost::intmax_t D = 1> class ratio; |
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// ratio arithmetic |
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template <class R1, class R2> struct ratio_add; |
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template <class R1, class R2> struct ratio_subtract; |
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template <class R1, class R2> struct ratio_multiply; |
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template <class R1, class R2> struct ratio_divide; |
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// ratio comparison |
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template <class R1, class R2> struct ratio_equal; |
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template <class R1, class R2> struct ratio_not_equal; |
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template <class R1, class R2> struct ratio_less; |
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template <class R1, class R2> struct ratio_less_equal; |
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template <class R1, class R2> struct ratio_greater; |
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template <class R1, class R2> struct ratio_greater_equal; |
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// convenience SI typedefs |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000000000)> atto; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000000)> femto; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000000)> pico; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000000)> nano; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000000)> micro; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(1000)> milli; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(100)> centi; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1), BOOST_RATIO_INTMAX_C(10)> deci; |
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typedef ratio< BOOST_RATIO_INTMAX_C(10), BOOST_RATIO_INTMAX_C(1)> deca; |
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typedef ratio< BOOST_RATIO_INTMAX_C(100), BOOST_RATIO_INTMAX_C(1)> hecto; |
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typedef ratio< BOOST_RATIO_INTMAX_C(1000), BOOST_RATIO_INTMAX_C(1)> kilo; |
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typedef ratio< BOOST_RATIO_INTMAX_C(1000000), BOOST_RATIO_INTMAX_C(1)> mega; |
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typedef ratio< BOOST_RATIO_INTMAX_C(1000000000), BOOST_RATIO_INTMAX_C(1)> giga; |
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typedef ratio< BOOST_RATIO_INTMAX_C(1000000000000), BOOST_RATIO_INTMAX_C(1)> tera; |
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typedef ratio< BOOST_RATIO_INTMAX_C(1000000000000000), BOOST_RATIO_INTMAX_C(1)> peta; |
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typedef ratio<BOOST_RATIO_INTMAX_C(1000000000000000000), BOOST_RATIO_INTMAX_C(1)> exa; |
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} // namespace boost |
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#endif // BOOST_RATIO_HPP
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