/*-----------------------------------------------------------------------------+ 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_OPEN_INTERVAL_HPP_JOFA_100930 #define BOOST_ICL_OPEN_INTERVAL_HPP_JOFA_100930 #include <functional> #include <boost/concept/assert.hpp> #include <boost/icl/detail/concept_check.hpp> #include <boost/icl/concept/interval.hpp> #include <boost/icl/type_traits/value_size.hpp> #include <boost/icl/type_traits/type_to_string.hpp> namespace boost{namespace icl { template <class DomainT, ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)> class open_interval { public: typedef open_interval<DomainT,Compare> type; typedef DomainT domain_type; typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; public: //========================================================================== //= Construct, copy, destruct //========================================================================== /** Default constructor; yields an empty interval <tt>(0,0)</tt>. */ open_interval() : _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value()) { BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); } //NOTE: Compiler generated copy constructor is used /** Constructor for an open singleton interval <tt>(val-1,val+1)</tt> */ explicit open_interval(const DomainT& val) : _lwb(pred(val)), _upb(succ(val)) { BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); // Only for discrete types this ctor creates an interval containing // a single element only. BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value)); BOOST_ASSERT((numeric_minimum<DomainT, domain_compare, is_numeric<DomainT>::value > ::is_less_than(val) )); } /** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */ open_interval(const DomainT& low, const DomainT& up) : _lwb(low), _upb(up) { BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); } DomainT lower()const{ return _lwb; } DomainT upper()const{ return _upb; } private: DomainT _lwb; DomainT _upb; }; //============================================================================== //=T open_interval -> concept intervals //============================================================================== template<class DomainT, ICL_COMPARE Compare> struct interval_traits< icl::open_interval<DomainT, Compare> > { typedef DomainT domain_type; typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; typedef icl::open_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(); }; }; //============================================================================== //= Type traits //============================================================================== template <class DomainT, ICL_COMPARE Compare> struct interval_bound_type< open_interval<DomainT,Compare> > { typedef interval_bound_type type; BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::static_open); }; template <class DomainT, ICL_COMPARE Compare> struct type_to_string<icl::open_interval<DomainT,Compare> > { static std::string apply() { return "(I)<"+ type_to_string<DomainT>::apply() +">"; } }; template<class DomainT, ICL_COMPARE Compare> struct value_size<icl::open_interval<DomainT,Compare> > { static std::size_t apply(const icl::open_interval<DomainT>&) { return 2; } }; }} // namespace icl boost #endif