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set-op.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2009
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9  * Last modified:
10  * $Date: 2010-03-03 16:38:41 +0100 (Wed, 03 Mar 2010) $
11  * $Revision: 10359 $
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37 
38 namespace Gecode { namespace Int { namespace Sequence {
39 
41  enum TakesStatus {
45  };
46 
48  template<class View>
50  takes(const View& x, int s) {
51  if (x.in(s))
52  return x.assigned() ? TS_YES : TS_MAYBE;
53  else
54  return TS_NO;
55  }
57  template<class View>
59  takes(const View& x, const IntSet& s) {
60  if ((x.max() < s.min()) || (x.min() > s.max()))
61  return TS_NO;
62  ViewRanges<View> ix(x);
63  IntSetRanges is(s);
64  switch (Iter::Ranges::compare(ix,is)) {
65  case Iter::Ranges::CS_SUBSET: return TS_YES;
66  case Iter::Ranges::CS_DISJOINT: return TS_NO;
67  case Iter::Ranges::CS_NONE: return TS_MAYBE;
68  default: GECODE_NEVER;
69  }
70  return TS_MAYBE;
71  }
72 
74  template<class View>
75  forceinline bool
76  includes(const View& x, int s) {
77  return x.assigned() && x.in(s);
78  }
80  template<class View>
81  forceinline bool
82  includes(const View& x, const IntSet& s) {
83  if ((x.max() < s.min()) || (x.min() > s.max()))
84  return false;
85  ViewRanges<View> ix(x);
86  IntSetRanges is(s);
87  return Iter::Ranges::subset(ix,is);
88  }
89 
91  template<class View>
92  forceinline bool
93  excludes(const View& x, int s) {
94  return !x.in(s);
95  }
97  template<class View>
98  forceinline bool
99  excludes(const View& x, const IntSet& s) {
100  if ((x.max() < s.min()) || (x.min() > s.max()))
101  return true;
102  ViewRanges<View> ix(x);
103  IntSetRanges is(s);
104  return Iter::Ranges::disjoint(ix,is);
105  }
106 
108  template<class View>
109  forceinline bool
110  undecided(const View& x, int s) {
111  return !x.assigned() && x.in(s);
112  }
114  template<class View>
115  forceinline bool
116  undecided(const View& x, const IntSet& s) {
117  if ((x.max() < s.min()) || (x.min() > s.max()))
118  return false;
119  ViewRanges<View> ix(x);
120  IntSetRanges is(s);
122  }
123 
125  template<class View>
127  include(Space& home, View& x, int s) {
128  return x.eq(home,s);
129  }
131  template<class View>
133  include(Space& home, View& x, const IntSet& s) {
134  IntSetRanges is(s);
135  return x.inter_r(home,is,false);
136  }
137 
139  template<class View>
141  exclude(Space& home, View& x, int s) {
142  return x.nq(home,s);
143  }
145  template<class View>
147  exclude(Space& home, View& x, const IntSet& s) {
148  IntSetRanges is(s);
149  return x.minus_r(home,is,false);
150  }
151 
152 }}}
153 
154 // STATISTICS: int-prop