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/*-----------------------------------------------------------------------------+
Copyright (c) 2010-2010: Joachim Faulhaber
+------------------------------------------------------------------------------+
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENCE.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
+-----------------------------------------------------------------------------*/
#ifndef BOOST_ICL_DISCRETE_INTERVAL_HPP_JOFA_100403
#define BOOST_ICL_DISCRETE_INTERVAL_HPP_JOFA_100403
#include <functional>
#include <boost/static_assert.hpp>
#include <boost/concept/assert.hpp>
#include <boost/icl/detail/concept_check.hpp>
#include <boost/icl/type_traits/succ_pred.hpp>
#include <boost/icl/concept/interval.hpp>
#include <boost/icl/type_traits/value_size.hpp>
#include <boost/icl/type_traits/type_to_string.hpp>
#include <boost/icl/type_traits/is_continuous.hpp>
#include <boost/icl/type_traits/is_discrete_interval.hpp>
#include <boost/icl/interval_bounds.hpp>
namespace boost{namespace icl
{
template <class DomainT,
ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)>
class discrete_interval
{
public:
typedef discrete_interval<DomainT,Compare> type;
typedef DomainT domain_type;
typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
typedef typename bounded_value<DomainT>::type bounded_domain_type;
public:
//==========================================================================
//= Construct, copy, destruct
//==========================================================================
/** Default constructor; yields an empty interval <tt>[0,0)</tt>. */
discrete_interval()
: _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value())
, _bounds(interval_bounds::right_open())
{
BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value));
}
//NOTE: Compiler generated copy constructor is used
/** Constructor for a closed singleton interval <tt>[val,val]</tt> */
explicit discrete_interval(const DomainT& val)
: _lwb(val), _upb(val), _bounds(interval_bounds::closed())
{
BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value));
}
/** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */
discrete_interval(const DomainT& low, const DomainT& up,
interval_bounds bounds = interval_bounds::right_open(),
discrete_interval* = 0)
: _lwb(low), _upb(up), _bounds(bounds)
{
BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value));
}
domain_type lower()const { return _lwb; }
domain_type upper()const { return _upb; }
interval_bounds bounds()const{ return _bounds; }
static discrete_interval open (const DomainT& lo, const DomainT& up){ return discrete_interval(lo, up, interval_bounds::open()); }
static discrete_interval right_open(const DomainT& lo, const DomainT& up){ return discrete_interval(lo, up, interval_bounds::right_open());}
static discrete_interval left_open (const DomainT& lo, const DomainT& up){ return discrete_interval(lo, up, interval_bounds::left_open()); }
static discrete_interval closed (const DomainT& lo, const DomainT& up){ return discrete_interval(lo, up, interval_bounds::closed()); }
private:
domain_type _lwb;
domain_type _upb;
interval_bounds _bounds;
};
//==============================================================================
//=T discrete_interval -> concept intervals
//==============================================================================
template<class DomainT, ICL_COMPARE Compare>
struct interval_traits< icl::discrete_interval<DomainT, Compare> >
{
typedef interval_traits type;
typedef DomainT domain_type;
typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
typedef icl::discrete_interval<DomainT, Compare> interval_type;
static interval_type construct(const domain_type& lo, const domain_type& up)
{
return interval_type(lo, up);
}
static domain_type lower(const interval_type& inter_val){ return inter_val.lower(); };
static domain_type upper(const interval_type& inter_val){ return inter_val.upper(); };
};
//==============================================================================
//=T discrete_interval -> concept dynamic_interval_traits
//==============================================================================
template<class DomainT, ICL_COMPARE Compare>
struct dynamic_interval_traits<boost::icl::discrete_interval<DomainT,Compare> >
{
typedef dynamic_interval_traits type;
typedef boost::icl::discrete_interval<DomainT,Compare> interval_type;
typedef DomainT domain_type;
typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
static interval_type construct(const domain_type& lo, const domain_type& up, interval_bounds bounds)
{
return interval_type(lo, up, bounds, static_cast<interval_type*>(0) );
}
static interval_type construct_bounded(const bounded_value<DomainT>& lo,
const bounded_value<DomainT>& up)
{
return interval_type
(
lo.value(), up.value(),
lo.bound().left() | up.bound().right(),
static_cast<interval_type* >(0)
);
}
};
//==============================================================================
//= Type traits
//==============================================================================
template <class DomainT, ICL_COMPARE Compare>
struct interval_bound_type< discrete_interval<DomainT,Compare> >
{
typedef interval_bound_type type;
BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::dynamic);
};
template <class DomainT, ICL_COMPARE Compare>
struct is_discrete_interval<discrete_interval<DomainT,Compare> >
{
typedef is_discrete_interval<discrete_interval<DomainT,Compare> > type;
BOOST_STATIC_CONSTANT(bool, value = is_discrete<DomainT>::value);
};
template <class DomainT, ICL_COMPARE Compare>
struct type_to_string<icl::discrete_interval<DomainT,Compare> >
{
static std::string apply()
{ return "dI<"+ type_to_string<DomainT>::apply() +">"; }
};
template<class DomainT>
struct value_size<icl::discrete_interval<DomainT> >
{
static std::size_t apply(const icl::discrete_interval<DomainT>&)
{ return 2; }
};
}} // namespace icl boost
#endif
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