50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// ratio.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_HPP
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#define BOOST_RATIO_RATIO_HPP
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#include <boost/ratio/ratio_fwd.hpp>
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#include <boost/ratio/detail/gcd_lcm.hpp>
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namespace boost
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{
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// extension used by Chrono
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template <class R1, class R2> using ratio_gcd = typename ratio<
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ratio_detail::gcd<R1::num, R2::num>::value,
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ratio_detail::lcm<R1::den, R2::den>::value>::type;
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} // namespace boost
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#endif // BOOST_RATIO_RATIO_HPP
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