Generated on Fri Jan 28 2022 04:43:06 for Gecode by doxygen 1.8.13
float-rel.hpp
Go to the documentation of this file.
1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
5  *
6  * Copyright:
7  * Vincent Barichard, 2012
8  *
9  * This file is part of Gecode, the generic constraint
10  * development environment:
11  * http://www.gecode.org
12  *
13  * Permission is hereby granted, free of charge, to any person obtaining
14  * a copy of this software and associated documentation files (the
15  * "Software"), to deal in the Software without restriction, including
16  * without limitation the rights to use, copy, modify, merge, publish,
17  * distribute, sublicense, and/or sell copies of the Software, and to
18  * permit persons to whom the Software is furnished to do so, subject to
19  * the following conditions:
20  *
21  * The above copyright notice and this permission notice shall be
22  * included in all copies or substantial portions of the Software.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31  *
32  */
33 
34 #ifdef GECODE_HAS_FLOAT_VARS
35 
36 namespace Gecode {
37 
38  /*
39  * Operations for linear float relations
40  *
41  */
43  LinFloatRel::LinFloatRel(void) {}
44 
46  LinFloatRel::LinFloatRel(const LinFloatExpr& l, FloatRelType frt0, const LinFloatExpr& r)
47  : e(l-r), frt(frt0) {}
48 
50  LinFloatRel::LinFloatRel(const LinFloatExpr& l, FloatRelType frt0, FloatVal r)
51  : e(l-r), frt(frt0) {}
52 
54  LinFloatRel::LinFloatRel(FloatVal l, FloatRelType frt0, const LinFloatExpr& r)
55  : e(l-r), frt(frt0) {}
56 
58  LinFloatRel::neg(FloatRelType frt) {
59  switch (frt) {
60  case FRT_EQ: return FRT_NQ;
61  case FRT_NQ: return FRT_EQ;
62  case FRT_LQ: return FRT_GR;
63  case FRT_LE: return FRT_GQ;
64  case FRT_GQ: return FRT_LE;
65  case FRT_GR: return FRT_LQ;
66  default: GECODE_NEVER;
67  }
68  return FRT_LQ;
69  }
70 
71  forceinline void
72  LinFloatRel::post(Home home, bool t) const {
73  e.post(home,t ? frt : neg(frt));
74  }
75 
76  forceinline void
77  LinFloatRel::post(Home home, const BoolVar& b, bool t) const {
78  e.post(home,t ? frt : neg(frt),b);
79  }
80 
81 }
82 
83 #endif
84 
85 // STATISTICS: minimodel-any
NodeType t
Type of node.
Definition: bool-expr.cpp:230
NNF * l
Left subtree.
Definition: bool-expr.cpp:240
Disequality ( )
Definition: float.hh:1070
Less or equal ( )
Definition: float.hh:1071
Less ( )
Definition: float.hh:1072
void post(Home home, bool t) const
Post propagator for relation (if t is false for negated relation)
Definition: float-rel.hpp:72
#define forceinline
Definition: config.hpp:185
Greater or equal ( )
Definition: float.hh:1073
FloatRelType
Relation types for floats.
Definition: float.hh:1068
struct Gecode::@593::NNF::@62::@63 b
For binary nodes (and, or, eqv)
Float expressions
Definition: minimodel.hh:718
Equality ( )
Definition: float.hh:1069
Greater ( )
Definition: float.hh:1074
Boolean integer variables.
Definition: int.hh:512
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition: set.hh:767
Float value type.
Definition: float.hh:334
Gecode toplevel namespace
Home class for posting propagators
Definition: core.hpp:853
#define GECODE_NEVER
Assert that this command is never executed.
Definition: macros.hpp:56
void post(Home home, FloatRelType frt) const
Post propagator.
Definition: float-expr.cpp:152