1 /*-----------------------------------------------------------------------------+
2 Copyright (c) 2011-2011: 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_CONCEPT_INTERVAL_ASSOCIATOR_BASE_HPP_JOFA_110301
9 #define BOOST_ICL_CONCEPT_INTERVAL_ASSOCIATOR_BASE_HPP_JOFA_110301
10
11 #include <boost/icl/type_traits/domain_type_of.hpp>
12 #include <boost/icl/type_traits/interval_type_of.hpp>
13 #include <boost/icl/type_traits/is_combinable.hpp>
14 #include <boost/icl/concept/set_value.hpp>
15 #include <boost/icl/concept/map_value.hpp>
16 #include <boost/icl/concept/interval.hpp>
17
18 namespace boost{ namespace icl
19 {
20
21 //==============================================================================
22 //= Selection<IntervalSet|IntervalMap>
23 //==============================================================================
24 template<class Type> inline
25 typename enable_if<mpl::and_< is_interval_container<Type>
26 , is_discrete<typename domain_type_of<Type>::type>
27 >
28 , typename Type::const_iterator>::type
find(const Type & object,const typename domain_type_of<Type>::type & key_val)29 find(const Type& object, const typename domain_type_of<Type>::type& key_val)
30 {
31 //CL typedef typename Type::const_iterator const_iterator;
32 typedef typename Type::interval_type interval_type;
33 return object.find(icl::detail::unit_trail<interval_type>(key_val));
34 }
35
36 template<class Type> inline
37 typename enable_if<mpl::and_< is_interval_container<Type>
38 , is_continuous<typename domain_type_of<Type>::type>
39 , has_dynamic_bounds<typename interval_type_of<Type>::type>
40 >
41 , typename Type::const_iterator>::type
find(const Type & object,const typename domain_type_of<Type>::type & key_val)42 find(const Type& object, const typename domain_type_of<Type>::type& key_val)
43 {
44 //CL typedef typename Type::const_iterator const_iterator;
45 typedef typename Type::interval_type interval_type;
46 return object.find(icl::singleton<interval_type>(key_val));
47 }
48
49 template<class Type> inline
50 typename enable_if<mpl::and_< is_interval_container<Type>
51 , is_continuous<typename domain_type_of<Type>::type>
52 , is_static_right_open<typename interval_type_of<Type>::type>
53 , boost::detail::is_incrementable<typename domain_type_of<Type>::type>
54 >
55 , typename Type::const_iterator>::type
find(const Type & object,const typename domain_type_of<Type>::type & key_val)56 find(const Type& object, const typename domain_type_of<Type>::type& key_val)
57 {
58 typedef typename Type::const_iterator const_iterator;
59 typedef typename Type::interval_type interval_type;
60 const_iterator first_collision = object.lower_bound(icl::detail::unit_trail<interval_type>(key_val));
61 // A part of the unit_trail(key_value)-interval may be found in the container, that
62 // does not contain key_value. Therefore we have to check for its existence:
63 return ( first_collision == object.end()
64 || icl::contains(key_value<Type>(first_collision), key_val) )
65 ? first_collision
66 : object.end();
67 }
68
69 template<class Type> inline
70 typename enable_if<mpl::and_< is_interval_container<Type>
71 , is_continuous<typename domain_type_of<Type>::type>
72 , is_static_left_open<typename interval_type_of<Type>::type>
73 , boost::detail::is_incrementable<typename domain_type_of<Type>::type>
74 >
75 , typename Type::const_iterator>::type
find(const Type & object,const typename domain_type_of<Type>::type & key_val)76 find(const Type& object, const typename domain_type_of<Type>::type& key_val)
77 {
78 typedef typename Type::const_iterator const_iterator;
79 typedef typename Type::interval_type interval_type;
80 const_iterator last_collision = object.upper_bound(icl::detail::unit_trail<interval_type>(key_val));
81 if(last_collision != object.begin())
82 --last_collision;
83 // A part of the unit_trail(key_value)-interval may be found in the container, that
84 // does not contain key_value. Therefore we have to check for its existence:
85 return ( last_collision == object.end()
86 || icl::contains(key_value<Type>(last_collision), key_val) )
87 ? last_collision
88 : object.end();
89 }
90
91 // NOTE: find(object, key) won't compile if key is of continuous type that does
92 // not implement in(de)crementation (e.g. std::string).
93
94 template<class Type> inline
95 typename enable_if< is_interval_container<Type>
96 , typename Type::const_iterator>::type
find(const Type & object,const typename interval_type_of<Type>::type & inter_val)97 find(const Type& object, const typename interval_type_of<Type>::type& inter_val)
98 {
99 return object.find(inter_val);
100 }
101
102 //==============================================================================
103 //= Morphisms
104 //==============================================================================
105 template<class Type>
106 typename enable_if<is_interval_container<Type>, Type>::type&
join(Type & object)107 join(Type& object)
108 {
109 typedef typename Type::interval_type interval_type;
110 typedef typename Type::iterator iterator;
111
112 iterator it_ = object.begin();
113 if(it_ == object.end())
114 return object;
115
116 iterator next_ = it_; next_++;
117
118 while(next_ != object.end())
119 {
120 if( segmental::is_joinable<Type>(it_, next_) )
121 {
122 iterator fst_mem = it_; // hold the first member
123
124 // Go on while touching members are found
125 it_++; next_++;
126 while( next_ != object.end()
127 && segmental::is_joinable<Type>(it_, next_) )
128 { it_++; next_++; }
129
130 // finally we arrive at the end of a sequence of joinable intervals
131 // and it points to the last member of that sequence
132 const_cast<interval_type&>(key_value<Type>(it_))
133 = hull(key_value<Type>(it_), key_value<Type>(fst_mem));
134 object.erase(fst_mem, it_);
135
136 it_++; next_=it_;
137 if(next_!=object.end())
138 next_++;
139 }
140 else { it_++; next_++; }
141 }
142 return object;
143 }
144
145 }} // namespace boost icl
146
147 #endif
148
149
150