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int-rel.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, 2005
8 *
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33
34namespace Gecode {
35
36 /*
37 * Operations for linear expressions
38 *
39 */
41 LinIntRel::LinIntRel(void) {}
42
44 LinIntRel::LinIntRel(const LinIntExpr& l, IntRelType irt0, const LinIntExpr& r)
45 : e(l-r), irt(irt0) {}
46
48 LinIntRel::LinIntRel(const LinIntExpr& l, IntRelType irt0, int r)
49 : e(l-r), irt(irt0) {}
50
52 LinIntRel::LinIntRel(int l, IntRelType irt0, const LinIntExpr& r)
53 : e(l-r), irt(irt0) {}
54
56 LinIntRel::neg(IntRelType irt) {
57 switch (irt) {
58 case IRT_EQ: return IRT_NQ;
59 case IRT_NQ: return IRT_EQ;
60 case IRT_LQ: return IRT_GR;
61 case IRT_LE: return IRT_GQ;
62 case IRT_GQ: return IRT_LE;
63 case IRT_GR: return IRT_LQ;
64 default: GECODE_NEVER;
65 }
66 return IRT_LQ;
67 }
68
69 forceinline void
70 LinIntRel::post(Home home, bool t,
71 const IntPropLevels& ipls) const {
72 e.post(home,t ? irt : neg(irt),ipls);
73 }
74
75 forceinline void
76 LinIntRel::post(Home home, const BoolVar& b, bool t,
77 const IntPropLevels& ipls) const {
78 e.post(home,t ? irt : neg(irt),b,ipls);
79 }
80
81}
82
83// STATISTICS: minimodel-any
Boolean integer variables.
Definition int.hh:515
Home class for posting propagators
Definition core.hpp:856
Class for specifying integer propagation levels used by minimodel.
Definition minimodel.hh:101
Linear expressions over integer variables.
Definition minimodel.hh:245
void post(Home home, bool t, const IntPropLevels &ipls) const
Post propagator for relation (if t is false for negated relation)
Definition int-rel.hpp:70
IntRelType
Relation types for integers.
Definition int.hh:940
@ IRT_EQ
Equality ( )
Definition int.hh:941
@ IRT_NQ
Disequality ( )
Definition int.hh:942
@ IRT_GQ
Greater or equal ( )
Definition int.hh:945
@ IRT_LE
Less ( )
Definition int.hh:944
@ IRT_GR
Greater ( )
Definition int.hh:946
@ IRT_LQ
Less or equal ( )
Definition int.hh:943
Gecode toplevel namespace
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition set.hh:773
#define forceinline
Definition config.hpp:194
#define GECODE_NEVER
Assert that this command is never executed.
Definition macros.hpp:56