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