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rounding.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\numeric\interval\rounding.hpp
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/* Boost interval/rounding.hpp template implementation file * * Copyright 2002-2003 Herv� Br�nnimann, Guillaume Melquiond, Sylvain Pion * * 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_NUMERIC_INTERVAL_ROUNDING_HPP #define BOOST_NUMERIC_INTERVAL_ROUNDING_HPP namespace boost { namespace numeric { namespace interval_lib { /* * Default rounding_control class (does nothing) */ template
struct rounding_control { typedef int rounding_mode; static void get_rounding_mode(rounding_mode&) {} static void set_rounding_mode(rounding_mode) {} static void upward() {} static void downward() {} static void to_nearest() {} static const T& to_int(const T& x) { return x; } static const T& force_rounding(const T& x) { return x; } }; /* * A few rounding control classes (exact/std/opp: see documentation) * rounded_arith_* control the rounding of the arithmetic operators * rounded_transc_* control the rounding of the transcendental functions */ template
> struct rounded_arith_exact; template
> struct rounded_arith_std; template
> struct rounded_arith_opp; template
struct rounded_transc_dummy; template
> struct rounded_transc_exact; template
> struct rounded_transc_std; template
> struct rounded_transc_opp; /* * State-saving classes: allow to set and reset rounding control */ namespace detail { template
struct save_state_unprotected: Rounding { typedef save_state_unprotected
unprotected_rounding; }; } // namespace detail template
struct save_state: Rounding { typename Rounding::rounding_mode mode; save_state() { this->get_rounding_mode(mode); this->init(); } ~save_state() { this->set_rounding_mode(mode); } typedef detail::save_state_unprotected
unprotected_rounding; }; template
struct save_state_nothing: Rounding { typedef save_state_nothing
unprotected_rounding; }; template
struct rounded_math: save_state_nothing
> {}; } // namespace interval_lib } // namespace numeric } // namespace boost #endif // BOOST_NUMERIC_INTERVAL_ROUNDING_HPP
rounding.hpp
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