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minus.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  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
6  *
7  * Copyright:
8  * Christian Schulte, 2003
9  * Vincent Barichard, 2012
10  *
11  * This file is part of Gecode, the generic constraint
12  * development environment:
13  * http://www.gecode.org
14  *
15  * Permission is hereby granted, free of charge, to any person obtaining
16  * a copy of this software and associated documentation files (the
17  * "Software"), to deal in the Software without restriction, including
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19  * distribute, sublicense, and/or sell copies of the Software, and to
20  * permit persons to whom the Software is furnished to do so, subject to
21  * the following conditions:
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24  * included in all copies or substantial portions of the Software.
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33  *
34  */
35 
36 namespace Gecode { namespace Float {
37 
38  /*
39  * Constructors and initialization
40  *
41  */
46  : DerivedView<FloatView>(y) {}
47 
48  /*
49  * Value access
50  *
51  */
53  MinusView::domain(void) const {
54  return -x.domain();
55  }
57  MinusView::min(void) const {
58  return -x.max();
59  }
61  MinusView::max(void) const {
62  return -x.min();
63  }
65  MinusView::med(void) const {
66  return -x.med();
67  }
69  MinusView::val(void) const {
70  return -x.val();
71  }
72 
74  MinusView::size(void) const {
75  return x.size();
76  }
77 
78 
79  /*
80  * Domain tests
81  *
82  */
83  forceinline bool
84  MinusView::zero_in(void) const {
85  return x.zero_in();
86  }
87  forceinline bool
89  return x.in(-n);
90  }
91  forceinline bool
92  MinusView::in(const FloatVal& n) const {
93  return x.in(-n);
94  }
95 
96 
97  /*
98  * Domain update by value
99  *
100  */
102  MinusView::lq(Space& home, int n) {
103  return x.gq(home,-n);
104  }
107  return x.gq(home,-n);
108  }
111  return x.gq(home,-n);
112  }
113 
115  MinusView::gq(Space& home, int n) {
116  return x.lq(home,-n);
117  }
120  return x.lq(home,-n);
121  }
124  return x.lq(home,-n);
125  }
126 
128  MinusView::eq(Space& home, int n) {
129  return x.eq(home,-n);
130  }
133  return x.eq(home,-n);
134  }
136  MinusView::eq(Space& home, const FloatVal& n) {
137  return x.eq(home,-n);
138  }
139 
140 
141  /*
142  * Delta information for advisors
143  *
144  */
146  MinusView::min(const Delta& d) const {
147  return -x.max(d);
148  }
150  MinusView::max(const Delta& d) const {
151  return -x.min(d);
152  }
153 
154 
158  }
159 
160  /*
161  * View comparison
162  *
163  */
164  forceinline bool
165  operator ==(const MinusView& x, const MinusView& y) {
166  return x.base() == y.base();
167  }
168  forceinline bool
169  operator !=(const MinusView& x, const MinusView& y) {
170  return !(x == y);
171  }
172 
173 }}
174 
175 // STATISTICS: float-var
176 
Post propagator for SetVar x
Definition: set.hh:767
Post propagator for SetVar SetOpType SetVar y
Definition: set.hh:767
FloatNum max(void) const
Return maximum of domain.
Definition: minus.hpp:61
FloatNum min(void) const
Return minimum of domain.
Definition: minus.hpp:57
bool zero_in(void) const
Test whether 0 is contained in domain.
Definition: minus.hpp:84
Computation spaces.
Definition: core.hpp:1742
ModEvent gq(Space &home, int n)
Restrict domain values to be greater or equal than n.
Definition: minus.hpp:115
Base-class for derived views.
Definition: view.hpp:230
Gecode toplevel namespace
bool operator!=(const MinusView &x, const MinusView &y)
Definition: minus.hpp:169
Float view for float variables.
Definition: view.hpp:52
Generic domain change information to be supplied to advisors.
Definition: core.hpp:204
FloatNum size(void) const
Return size of domain (distance between maximum and minimum)
Definition: minus.hpp:74
ModEvent eq(Space &home, int n)
Restrict domain values to be equal to n.
Definition: minus.hpp:128
bool in(FloatNum n) const
Test whether n is contained in domain.
Definition: minus.hpp:88
double FloatNum
Floating point number base type.
Definition: float.hh:106
bool operator==(const MinusView &x, const MinusView &y)
Definition: minus.hpp:165
FloatVal domain(void) const
Return domain.
Definition: minus.hpp:53
Minus float view.
Definition: view.hpp:154
MinusView(void)
Default constructor.
Definition: minus.hpp:43
FloatVal val(void) const
Return assigned value.
Definition: minus.hpp:69
int ModEvent
Type for modification events.
Definition: core.hpp:62
static ModEvent me(const ModEventDelta &med)
Return modification event for view type in med.
Definition: view.hpp:639
FloatView x
View from which this view is derived.
Definition: view.hpp:238
Float value type.
Definition: float.hh:334
ModEvent lq(Space &home, int n)
Restrict domain values to be less or equal than n.
Definition: minus.hpp:102
Gecode::IntSet d(v, 7)
FloatNum med(void) const
Return median of domain (closest representation)
Definition: minus.hpp:65
#define forceinline
Definition: config.hpp:185
static ModEventDelta med(ModEvent me)
Translate modification event me to modification event delta for view.
Definition: view.hpp:557
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:234
int ModEventDelta
Modification event deltas.
Definition: core.hpp:89