sl@0: /* Boost interval/policies.hpp template implementation file
sl@0:  *
sl@0:  * Copyright 2003 Guillaume Melquiond
sl@0:  *
sl@0:  * Distributed under the Boost Software License, Version 1.0.
sl@0:  * (See accompanying file LICENSE_1_0.txt or
sl@0:  * copy at http://www.boost.org/LICENSE_1_0.txt)
sl@0:  */
sl@0: 
sl@0: #ifndef BOOST_NUMERIC_INTERVAL_POLICIES_HPP
sl@0: #define BOOST_NUMERIC_INTERVAL_POLICIES_HPP
sl@0: 
sl@0: #include <boost/numeric/interval/interval.hpp>
sl@0: 
sl@0: namespace boost {
sl@0: namespace numeric {
sl@0: namespace interval_lib {
sl@0: 
sl@0: /*
sl@0:  * policies class
sl@0:  */
sl@0: 
sl@0: template<class Rounding, class Checking>
sl@0: struct policies
sl@0: {
sl@0:   typedef Rounding rounding;
sl@0:   typedef Checking checking;
sl@0: };
sl@0: 
sl@0: /*
sl@0:  * policies switching classes
sl@0:  */
sl@0: 
sl@0: template<class OldInterval, class NewRounding>
sl@0: class change_rounding
sl@0: {
sl@0:   typedef typename OldInterval::base_type T;
sl@0:   typedef typename OldInterval::traits_type p;
sl@0:   typedef typename p::checking checking;
sl@0: public:
sl@0:   typedef interval<T, policies<NewRounding, checking> > type;
sl@0: };
sl@0: 
sl@0: template<class OldInterval, class NewChecking>
sl@0: class change_checking
sl@0: {
sl@0:   typedef typename OldInterval::base_type T;
sl@0:   typedef typename OldInterval::traits_type p;
sl@0:   typedef typename p::rounding rounding;
sl@0: public:
sl@0:   typedef interval<T, policies<rounding, NewChecking> > type;
sl@0: };
sl@0: 
sl@0: /*
sl@0:  * Protect / unprotect: control whether the rounding mode is set/reset
sl@0:  * at each operation, rather than once and for all.
sl@0:  */
sl@0: 
sl@0: template<class OldInterval>
sl@0: class unprotect
sl@0: {
sl@0:   typedef typename OldInterval::base_type T;
sl@0:   typedef typename OldInterval::traits_type p;
sl@0:   typedef typename p::rounding r;
sl@0:   typedef typename r::unprotected_rounding newRounding;
sl@0: public:
sl@0:   typedef typename change_rounding<OldInterval, newRounding>::type type;
sl@0: };
sl@0: 
sl@0: } // namespace interval_lib
sl@0: } // namespace numeric
sl@0: } // namespace boost
sl@0: 
sl@0: 
sl@0: #endif // BOOST_NUMERIC_INTERVAL_POLICIES_HPP