Chris@16: /* Boost interval/policies.hpp template implementation file
Chris@16:  *
Chris@16:  * Copyright 2003 Guillaume Melquiond
Chris@16:  *
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or
Chris@16:  * copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_NUMERIC_INTERVAL_POLICIES_HPP
Chris@16: #define BOOST_NUMERIC_INTERVAL_POLICIES_HPP
Chris@16: 
Chris@16: #include <boost/numeric/interval/interval.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace numeric {
Chris@16: namespace interval_lib {
Chris@16: 
Chris@16: /*
Chris@16:  * policies class
Chris@16:  */
Chris@16: 
Chris@16: template<class Rounding, class Checking>
Chris@16: struct policies
Chris@16: {
Chris@16:   typedef Rounding rounding;
Chris@16:   typedef Checking checking;
Chris@16: };
Chris@16: 
Chris@16: /*
Chris@16:  * policies switching classes
Chris@16:  */
Chris@16: 
Chris@16: template<class OldInterval, class NewRounding>
Chris@16: class change_rounding
Chris@16: {
Chris@16:   typedef typename OldInterval::base_type T;
Chris@16:   typedef typename OldInterval::traits_type p;
Chris@16:   typedef typename p::checking checking;
Chris@16: public:
Chris@16:   typedef interval<T, policies<NewRounding, checking> > type;
Chris@16: };
Chris@16: 
Chris@16: template<class OldInterval, class NewChecking>
Chris@16: class change_checking
Chris@16: {
Chris@16:   typedef typename OldInterval::base_type T;
Chris@16:   typedef typename OldInterval::traits_type p;
Chris@16:   typedef typename p::rounding rounding;
Chris@16: public:
Chris@16:   typedef interval<T, policies<rounding, NewChecking> > type;
Chris@16: };
Chris@16: 
Chris@16: /*
Chris@16:  * Protect / unprotect: control whether the rounding mode is set/reset
Chris@16:  * at each operation, rather than once and for all.
Chris@16:  */
Chris@16: 
Chris@16: template<class OldInterval>
Chris@16: class unprotect
Chris@16: {
Chris@16:   typedef typename OldInterval::base_type T;
Chris@16:   typedef typename OldInterval::traits_type p;
Chris@16:   typedef typename p::rounding r;
Chris@16:   typedef typename r::unprotected_rounding newRounding;
Chris@16: public:
Chris@16:   typedef typename change_rounding<OldInterval, newRounding>::type type;
Chris@16: };
Chris@16: 
Chris@16: } // namespace interval_lib
Chris@16: } // namespace numeric
Chris@16: } // namespace boost
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_NUMERIC_INTERVAL_POLICIES_HPP