1 /*-----------------------------------------------------------------------------+ 2 Copyright (c) 2010-2010: Joachim Faulhaber 3 +------------------------------------------------------------------------------+ 4 Distributed under the Boost Software License, Version 1.0. 5 (See accompanying file LICENCE.txt or copy at 6 http://www.boost.org/LICENSE_1_0.txt) 7 +-----------------------------------------------------------------------------*/ 8 #ifndef BOOST_ICL_CONTINUOUS_INTERVAL_HPP_JOFA_100327 9 #define BOOST_ICL_CONTINUOUS_INTERVAL_HPP_JOFA_100327 10 11 #include <functional> 12 #include <boost/static_assert.hpp> 13 #include <boost/concept/assert.hpp> 14 #include <boost/icl/detail/concept_check.hpp> 15 #include <boost/icl/concept/interval.hpp> 16 #include <boost/icl/concept/container.hpp> 17 #include <boost/icl/type_traits/value_size.hpp> 18 #include <boost/icl/type_traits/type_to_string.hpp> 19 #include <boost/icl/type_traits/is_continuous.hpp> 20 #include <boost/icl/type_traits/is_continuous_interval.hpp> 21 #include <boost/icl/interval_bounds.hpp> 22 23 namespace boost{namespace icl 24 { 25 26 template <class DomainT, 27 ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)> 28 class continuous_interval 29 { 30 public: 31 typedef continuous_interval<DomainT,Compare> type; 32 typedef DomainT domain_type; 33 typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; 34 typedef typename bounded_value<DomainT>::type bounded_domain_type; 35 36 public: 37 //========================================================================== 38 //= Construct, copy, destruct 39 //========================================================================== 40 /** Default constructor; yields an empty interval <tt>[0,0)</tt>. */ continuous_interval()41 continuous_interval() 42 : _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value()) 43 , _bounds(interval_bounds::right_open()) 44 { 45 BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); 46 BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); 47 BOOST_STATIC_ASSERT((icl::is_continuous<DomainT>::value)); 48 } 49 50 //NOTE: Compiler generated copy constructor is used 51 52 /** Constructor for a closed singleton interval <tt>[val,val]</tt> */ continuous_interval(const DomainT & val)53 explicit continuous_interval(const DomainT& val) 54 : _lwb(val), _upb(val), _bounds(interval_bounds::closed()) 55 { 56 BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); 57 BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); 58 BOOST_STATIC_ASSERT((icl::is_continuous<DomainT>::value)); 59 } 60 61 /** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */ continuous_interval(const DomainT & low,const DomainT & up,interval_bounds bounds=interval_bounds::right_open (),continuous_interval * =0)62 continuous_interval(const DomainT& low, const DomainT& up, 63 interval_bounds bounds = interval_bounds::right_open(), 64 continuous_interval* = 0) 65 : _lwb(low), _upb(up), _bounds(bounds) 66 { 67 BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); 68 BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); 69 BOOST_STATIC_ASSERT((icl::is_continuous<DomainT>::value)); 70 } 71 lower() const72 domain_type lower()const { return _lwb; } upper() const73 domain_type upper()const { return _upb; } bounds() const74 interval_bounds bounds()const{ return _bounds; } 75 open(const DomainT & lo,const DomainT & up)76 static continuous_interval open (const DomainT& lo, const DomainT& up){ return continuous_interval(lo, up, interval_bounds::open()); } right_open(const DomainT & lo,const DomainT & up)77 static continuous_interval right_open(const DomainT& lo, const DomainT& up){ return continuous_interval(lo, up, interval_bounds::right_open());} left_open(const DomainT & lo,const DomainT & up)78 static continuous_interval left_open (const DomainT& lo, const DomainT& up){ return continuous_interval(lo, up, interval_bounds::left_open()); } closed(const DomainT & lo,const DomainT & up)79 static continuous_interval closed (const DomainT& lo, const DomainT& up){ return continuous_interval(lo, up, interval_bounds::closed()); } 80 81 private: 82 domain_type _lwb; 83 domain_type _upb; 84 interval_bounds _bounds; 85 }; 86 87 88 //============================================================================== 89 //=T continuous_interval -> concept interval 90 //============================================================================== 91 template<class DomainT, ICL_COMPARE Compare> 92 struct interval_traits< icl::continuous_interval<DomainT, Compare> > 93 { 94 typedef interval_traits type; 95 typedef DomainT domain_type; 96 typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; 97 typedef icl::continuous_interval<DomainT, Compare> interval_type; 98 constructboost::icl::interval_traits99 static interval_type construct(const domain_type& lo, const domain_type& up) 100 { 101 return interval_type(lo, up); 102 } 103 lowerboost::icl::interval_traits104 static domain_type lower(const interval_type& inter_val){ return inter_val.lower(); }; upperboost::icl::interval_traits105 static domain_type upper(const interval_type& inter_val){ return inter_val.upper(); }; 106 }; 107 108 109 //============================================================================== 110 //=T continuous_interval -> concept dynamic_interval 111 //============================================================================== 112 template<class DomainT, ICL_COMPARE Compare> 113 struct dynamic_interval_traits<boost::icl::continuous_interval<DomainT,Compare> > 114 { 115 typedef dynamic_interval_traits type; 116 typedef boost::icl::continuous_interval<DomainT,Compare> interval_type; 117 typedef DomainT domain_type; 118 typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; 119 constructboost::icl::dynamic_interval_traits120 static interval_type construct(const domain_type lo, const domain_type up, interval_bounds bounds) 121 { 122 return icl::continuous_interval<DomainT,Compare>(lo, up, bounds, 123 static_cast<icl::continuous_interval<DomainT,Compare>* >(0) ); 124 } 125 construct_boundedboost::icl::dynamic_interval_traits126 static interval_type construct_bounded(const bounded_value<DomainT>& lo, 127 const bounded_value<DomainT>& up) 128 { 129 return icl::continuous_interval<DomainT,Compare> 130 ( 131 lo.value(), up.value(), 132 lo.bound().left() | up.bound().right(), 133 static_cast<icl::continuous_interval<DomainT,Compare>* >(0) 134 ); 135 } 136 }; 137 138 //============================================================================== 139 //= Type traits 140 //============================================================================== 141 template <class DomainT, ICL_COMPARE Compare> 142 struct interval_bound_type< continuous_interval<DomainT,Compare> > 143 { 144 typedef interval_bound_type type; 145 BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::dynamic); 146 }; 147 148 template <class DomainT, ICL_COMPARE Compare> 149 struct is_continuous_interval<continuous_interval<DomainT,Compare> > 150 { 151 typedef is_continuous_interval<continuous_interval<DomainT,Compare> > type; 152 BOOST_STATIC_CONSTANT(bool, value = true); 153 }; 154 155 template <class DomainT, ICL_COMPARE Compare> 156 struct type_to_string<icl::continuous_interval<DomainT,Compare> > 157 { applyboost::icl::type_to_string158 static std::string apply() 159 { return "cI<"+ type_to_string<DomainT>::apply() +">"; } 160 }; 161 162 template<class DomainT> 163 struct value_size<icl::continuous_interval<DomainT> > 164 { applyboost::icl::value_size165 static std::size_t apply(const icl::continuous_interval<DomainT>&) 166 { return 2; } 167 }; 168 169 }} // namespace icl boost 170 171 #endif 172 173