// 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> 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; // 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; } // namespace boost #endif // BOOST_RATIO_HPP