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119 lines
4.3 KiB
119 lines
4.3 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_OPEN_INTERVAL_HPP_JOFA_100930 |
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#define BOOST_ICL_OPEN_INTERVAL_HPP_JOFA_100930 |
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#include <functional> |
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#include <boost/concept/assert.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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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 open_interval |
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{ |
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public: |
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typedef open_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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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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open_interval() |
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: _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value()) |
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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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} |
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//NOTE: Compiler generated copy constructor is used |
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/** Constructor for an open singleton interval <tt>(val-1,val+1)</tt> */ |
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explicit open_interval(const DomainT& val) |
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: _lwb(pred(val)), _upb(succ(val)) |
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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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// Only for discrete types this ctor creates an interval containing |
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// a single element only. |
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BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value)); |
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BOOST_ASSERT((numeric_minimum<DomainT, domain_compare, is_numeric<DomainT>::value > |
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::is_less_than(val) )); |
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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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open_interval(const DomainT& low, const DomainT& up) : |
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_lwb(low), _upb(up) |
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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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} |
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DomainT lower()const{ return _lwb; } |
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DomainT upper()const{ return _upb; } |
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private: |
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DomainT _lwb; |
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DomainT _upb; |
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}; |
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//============================================================================== |
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//=T open_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::open_interval<DomainT, Compare> > |
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{ |
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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::open_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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//= Type traits |
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//============================================================================== |
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template <class DomainT, ICL_COMPARE Compare> |
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struct interval_bound_type< open_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::static_open); |
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}; |
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template <class DomainT, ICL_COMPARE Compare> |
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struct type_to_string<icl::open_interval<DomainT,Compare> > |
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{ |
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static std::string apply() |
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{ return "(I)<"+ type_to_string<DomainT>::apply() +">"; } |
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}; |
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template<class DomainT, ICL_COMPARE Compare> |
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struct value_size<icl::open_interval<DomainT,Compare> > |
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{ |
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static std::size_t apply(const icl::open_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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