Chris@16: /*-----------------------------------------------------------------------------+
Chris@16: Copyright (c) 2010-2010: Joachim Faulhaber
Chris@16: +------------------------------------------------------------------------------+
Chris@16:    Distributed under the Boost Software License, Version 1.0.
Chris@16:       (See accompanying file LICENCE.txt or copy at
Chris@16:            http://www.boost.org/LICENSE_1_0.txt)
Chris@16: +-----------------------------------------------------------------------------*/
Chris@16: #ifndef BOOST_ICL_OPEN_INTERVAL_HPP_JOFA_100930
Chris@16: #define BOOST_ICL_OPEN_INTERVAL_HPP_JOFA_100930
Chris@16: 
Chris@16: #include <functional>
Chris@16: #include <boost/concept/assert.hpp>
Chris@101: #include <boost/icl/detail/concept_check.hpp>
Chris@16: #include <boost/icl/concept/interval.hpp>
Chris@16: #include <boost/icl/type_traits/value_size.hpp>
Chris@16: #include <boost/icl/type_traits/type_to_string.hpp>
Chris@16: 
Chris@16: namespace boost{namespace icl
Chris@16: {
Chris@16: 
Chris@16: template <class DomainT, 
Chris@16:           ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)>
Chris@16: class open_interval
Chris@16: {
Chris@16: public:
Chris@16:     typedef open_interval<DomainT,Compare> type;
Chris@16:     typedef DomainT domain_type;
Chris@16:     typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
Chris@16: 
Chris@16: public:
Chris@16:     //==========================================================================
Chris@16:     //= Construct, copy, destruct
Chris@16:     //==========================================================================
Chris@16:     /** Default constructor; yields an empty interval <tt>(0,0)</tt>. */
Chris@16:     open_interval() 
Chris@16:         : _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value()) 
Chris@16:     {
Chris@16:         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
Chris@16:         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
Chris@16:     }
Chris@16: 
Chris@16:     //NOTE: Compiler generated copy constructor is used
Chris@16: 
Chris@16:     /** Constructor for an open singleton interval <tt>(val-1,val+1)</tt> */
Chris@16:     explicit open_interval(const DomainT& val)
Chris@16:         : _lwb(pred(val)), _upb(succ(val))
Chris@16:     {
Chris@16:         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
Chris@16:         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
Chris@16:         // Only for discrete types this ctor creates an interval containing 
Chris@16:         // a single element only.
Chris@16:         BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value));
Chris@16:         BOOST_ASSERT((numeric_minimum<DomainT, domain_compare, is_numeric<DomainT>::value >
Chris@16:                                      ::is_less_than(val) )); 
Chris@16:     }
Chris@16: 
Chris@16:     /** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */
Chris@16:     open_interval(const DomainT& low, const DomainT& up) :
Chris@16:         _lwb(low), _upb(up)
Chris@16:     {
Chris@16:         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
Chris@16:         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
Chris@16:     }
Chris@16: 
Chris@16:     DomainT lower()const{ return _lwb; }
Chris@16:     DomainT upper()const{ return _upb; }
Chris@16: 
Chris@16: private:
Chris@16:     DomainT _lwb;
Chris@16:     DomainT _upb;
Chris@16: };
Chris@16: 
Chris@16: //==============================================================================
Chris@16: //=T open_interval -> concept intervals
Chris@16: //==============================================================================
Chris@16: template<class DomainT, ICL_COMPARE Compare>
Chris@16: struct interval_traits< icl::open_interval<DomainT, Compare> >
Chris@16: {
Chris@16:     typedef DomainT domain_type;
Chris@16:     typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
Chris@16:     typedef icl::open_interval<DomainT, Compare> interval_type;
Chris@16: 
Chris@16:     static interval_type construct(const domain_type& lo, const domain_type& up)
Chris@16:     {
Chris@16:         return interval_type(lo, up);
Chris@16:     }
Chris@16: 
Chris@16:     static domain_type lower(const interval_type& inter_val){ return inter_val.lower(); };
Chris@16:     static domain_type upper(const interval_type& inter_val){ return inter_val.upper(); };
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: //==============================================================================
Chris@16: //= Type traits
Chris@16: //==============================================================================
Chris@16: template <class DomainT, ICL_COMPARE Compare> 
Chris@16: struct interval_bound_type< open_interval<DomainT,Compare> >
Chris@16: {
Chris@16:     typedef interval_bound_type type;
Chris@16:     BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::static_open);
Chris@16: };
Chris@16: 
Chris@16: template <class DomainT, ICL_COMPARE Compare>
Chris@16: struct type_to_string<icl::open_interval<DomainT,Compare> >
Chris@16: {
Chris@16:     static std::string apply()
Chris@16:     { return "(I)<"+ type_to_string<DomainT>::apply() +">"; }
Chris@16: };
Chris@16: 
Chris@16: template<class DomainT, ICL_COMPARE Compare> 
Chris@16: struct value_size<icl::open_interval<DomainT,Compare> >
Chris@16: {
Chris@16:     static std::size_t apply(const icl::open_interval<DomainT>&) 
Chris@16:     { return 2; }
Chris@16: };
Chris@16: 
Chris@16: }} // namespace icl boost
Chris@16: 
Chris@16: #endif
Chris@16: