76 lines
1.8 KiB
Plaintext
76 lines
1.8 KiB
Plaintext
|
/* Boost interval/policies.hpp template implementation file
|
||
|
|
*
|
||
|
|
* Copyright 2003 Guillaume Melquiond
|
||
|
|
*
|
||
|
|
* 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_POLICIES_HPP
|
||
|
|
#define BOOST_NUMERIC_INTERVAL_POLICIES_HPP
|
||
|
|
|
||
|
|
#include <boost/numeric/interval/interval.hpp>
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
namespace numeric {
|
||
|
|
namespace interval_lib {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* policies class
|
||
|
|
*/
|
||
|
|
|
||
|
|
template<class Rounding, class Checking>
|
||
|
|
struct policies
|
||
|
|
{
|
||
|
|
typedef Rounding rounding;
|
||
|
|
typedef Checking checking;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* policies switching classes
|
||
|
|
*/
|
||
|
|
|
||
|
|
template<class OldInterval, class NewRounding>
|
||
|
|
class change_rounding
|
||
|
|
{
|
||
|
|
typedef typename OldInterval::base_type T;
|
||
|
|
typedef typename OldInterval::traits_type p;
|
||
|
|
typedef typename p::checking checking;
|
||
|
|
public:
|
||
|
|
typedef interval<T, policies<NewRounding, checking> > type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class OldInterval, class NewChecking>
|
||
|
|
class change_checking
|
||
|
|
{
|
||
|
|
typedef typename OldInterval::base_type T;
|
||
|
|
typedef typename OldInterval::traits_type p;
|
||
|
|
typedef typename p::rounding rounding;
|
||
|
|
public:
|
||
|
|
typedef interval<T, policies<rounding, NewChecking> > type;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Protect / unprotect: control whether the rounding mode is set/reset
|
||
|
|
* at each operation, rather than once and for all.
|
||
|
|
*/
|
||
|
|
|
||
|
|
template<class OldInterval>
|
||
|
|
class unprotect
|
||
|
|
{
|
||
|
|
typedef typename OldInterval::base_type T;
|
||
|
|
typedef typename OldInterval::traits_type p;
|
||
|
|
typedef typename p::rounding r;
|
||
|
|
typedef typename r::unprotected_rounding newRounding;
|
||
|
|
public:
|
||
|
|
typedef typename change_rounding<OldInterval, newRounding>::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace interval_lib
|
||
|
|
} // namespace numeric
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
|
||
|
|
#endif // BOOST_NUMERIC_INTERVAL_POLICIES_HPP
|