ite.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2013
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
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* permit persons to whom the Software is furnished to do so, subject to
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*
* The above copyright notice and this permission notice shall be
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*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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#include <gecode/int/rel.hh>
#include <algorithm>
namespace Gecode { namespace Int { namespace Bool {
template<class V0, class V1, class V2, PropCond pc>
forceinline
IteBase<V0,V1,V2,pc>::IteBase(Home home, BoolView b0, V0 y0, V1 y1, V2 y2)
: Propagator(home), b(b0), x0(y0), x1(y1), x2(y2) {
b.subscribe(home,*this,PC_BOOL_VAL);
x0.subscribe(home,*this,pc);
x1.subscribe(home,*this,pc);
x2.subscribe(home,*this,pc);
}
template<class V0, class V1, class V2, PropCond pc>
forceinline
IteBase<V0,V1,V2,pc>::IteBase(Space& home, IteBase<V0,V1,V2,pc>& p)
: Propagator(home,p) {
b.update(home,p.b);
x0.update(home,p.x0);
x1.update(home,p.x1);
x2.update(home,p.x2);
}
template<class V0, class V1, class V2, PropCond pc>
PropCost
IteBase<V0,V1,V2,pc>::cost(const Space&, const ModEventDelta&) const {
return PropCost::ternary(PropCost::LO);
}
template<class V0, class V1, class V2, PropCond pc>
void
IteBase<V0,V1,V2,pc>::reschedule(Space& home) {
b.reschedule(home,*this,PC_BOOL_VAL);
x0.reschedule(home,*this,pc);
x1.reschedule(home,*this,pc);
x2.reschedule(home,*this,pc);
}
template<class V0, class V1, class V2, PropCond pc>
forceinline size_t
IteBase<V0,V1,V2,pc>::dispose(Space& home) {
b.cancel(home,*this,PC_BOOL_VAL);
x0.cancel(home,*this,pc);
x1.cancel(home,*this,pc);
x2.cancel(home,*this,pc);
(void) Propagator::dispose(home);
return sizeof(*this);
}
template<class V0, class V1, class V2>
forceinline
IteBnd<V0,V1,V2>::IteBnd(Home home, BoolView b, V0 x0, V1 x1, V2 x2)
: IteBase<V0,V1,V2,PC_INT_BND>(home,b,x0,x1,x2) {}
template<class V0, class V1, class V2>
forceinline
IteBnd<V0,V1,V2>::IteBnd(Space& home, IteBnd<V0,V1,V2>& p)
: IteBase<V0,V1,V2,PC_INT_BND>(home,p) {}
template<class V0, class V1, class V2>
Actor*
IteBnd<V0,V1,V2>::copy(Space& home) {
return new (home) IteBnd<V0,V1,V2>(home,*this);
}
template<class V0, class V1, class V2>
inline ExecStatus
IteBnd<V0,V1,V2>::post(Home home, BoolView b, V0 x0, V1 x1, V2 x2) {
if (b.one())
return Rel::EqBnd<V2,V0>::post(home,x2,x0);
if (b.zero())
return Rel::EqBnd<V2,V1>::post(home,x2,x1);
GECODE_ME_CHECK(x2.lq(home,std::max(x0.max(),x1.max())));
GECODE_ME_CHECK(x2.gq(home,std::min(x0.min(),x1.min())));
(void) new (home) IteBnd<V0,V1,V2>(home,b,x0,x1,x2);
return ES_OK;
}
template<class V0, class V1, class V2>
ExecStatus
IteBnd<V0,V1,V2>::propagate(Space& home, const ModEventDelta&) {
if (b.one())
GECODE_REWRITE(*this,(Rel::EqBnd<V2,V0>::post(home(*this),x2,x0)));
if (b.zero())
GECODE_REWRITE(*this,(Rel::EqBnd<V2,V1>::post(home(*this),x2,x1)));
GECODE_ME_CHECK(x2.lq(home,std::max(x0.max(),x1.max())));
GECODE_ME_CHECK(x2.gq(home,std::min(x0.min(),x1.min())));
RelTest eq20 = rtest_eq_bnd(x2,x0);
RelTest eq21 = rtest_eq_bnd(x2,x1);
if ((eq20 == RT_FALSE) && (eq21 == RT_FALSE))
return ES_FAILED;
if (eq20 == RT_FALSE) {
GECODE_ME_CHECK(b.zero_none(home));
if (eq21 == RT_TRUE)
return home.ES_SUBSUMED(*this);
else
GECODE_REWRITE(*this,(Rel::EqBnd<V2,V1>::post(home(*this),x2,x1)));
}
if (eq21 == RT_FALSE) {
GECODE_ME_CHECK(b.one_none(home));
if (eq20 == RT_TRUE)
return home.ES_SUBSUMED(*this);
else
GECODE_REWRITE(*this,(Rel::EqBnd<V2,V0>::post(home(*this),x2,x0)));
}
if ((eq20 == RT_TRUE) && (eq21 == RT_TRUE))
return home.ES_SUBSUMED(*this);
return ES_FIX;
}
template<class V0, class V1, class V2>
forceinline
IteDom<V0,V1,V2>::IteDom(Home home, BoolView b, V0 x0, V1 x1, V2 x2)
: IteBase<V0,V1,V2,PC_INT_DOM>(home,b,x0,x1,x2) {}
template<class V0, class V1, class V2>
forceinline
IteDom<V0,V1,V2>::IteDom(Space& home, IteDom<V0,V1,V2>& p)
: IteBase<V0,V1,V2,PC_INT_DOM>(home,p) {}
template<class V0, class V1, class V2>
Actor*
IteDom<V0,V1,V2>::copy(Space& home) {
return new (home) IteDom<V0,V1,V2>(home,*this);
}
template<class V0, class V1, class V2>
inline ExecStatus
IteDom<V0,V1,V2>::post(Home home, BoolView b, V0 x0, V1 x1, V2 x2) {
if (b.one())
return Rel::EqDom<V2,V0>::post(home,x2,x0);
if (b.zero())
return Rel::EqDom<V2,V1>::post(home,x2,x1);
GECODE_ME_CHECK(x2.lq(home,std::max(x0.max(),x1.max())));
GECODE_ME_CHECK(x2.gq(home,std::min(x0.min(),x1.min())));
(void) new (home) IteDom<V0,V1,V2>(home,b,x0,x1,x2);
return ES_OK;
}
template<class V0, class V1, class V2>
PropCost
IteDom<V0,V1,V2>::cost(const Space&, const ModEventDelta& med) const {
if (V0::me(med) == ME_INT_DOM)
return PropCost::ternary(PropCost::HI);
else
return PropCost::ternary(PropCost::LO);
}
template<class V0, class V1, class V2>
ExecStatus
IteDom<V0,V1,V2>::propagate(Space& home, const ModEventDelta& med) {
if (b.one())
GECODE_REWRITE(*this,(Rel::EqDom<V2,V0>::post(home(*this),x2,x0)));
if (b.zero())
GECODE_REWRITE(*this,(Rel::EqDom<V2,V1>::post(home(*this),x2,x1)));
GECODE_ME_CHECK(x2.lq(home,std::max(x0.max(),x1.max())));
GECODE_ME_CHECK(x2.gq(home,std::min(x0.min(),x1.min())));
if (V0::me(med) != ME_INT_DOM) {
RelTest eq20 = rtest_eq_bnd(x2,x0);
RelTest eq21 = rtest_eq_bnd(x2,x1);
if ((eq20 == RT_FALSE) && (eq21 == RT_FALSE))
return ES_FAILED;
if (eq20 == RT_FALSE) {
GECODE_ME_CHECK(b.zero_none(home));
if (eq21 == RT_TRUE)
return home.ES_SUBSUMED(*this);
else
GECODE_REWRITE(*this,
(Rel::EqDom<V2,V1>::post(home(*this),x2,x1)));
}
if (eq21 == RT_FALSE) {
GECODE_ME_CHECK(b.one_none(home));
if (eq20 == RT_TRUE)
return home.ES_SUBSUMED(*this);
else
GECODE_REWRITE(*this,
(Rel::EqDom<V2,V0>::post(home(*this),x2,x0)));
}
if ((eq20 == RT_TRUE) && (eq21 == RT_TRUE))
return home.ES_SUBSUMED(*this);
return home.ES_FIX_PARTIAL(*this,V0::med(ME_INT_DOM));
}
RelTest eq20 = rtest_eq_dom(x2,x0);
RelTest eq21 = rtest_eq_dom(x2,x1);
if ((eq20 == RT_FALSE) && (eq21 == RT_FALSE))
return ES_FAILED;
if (eq20 == RT_FALSE) {
GECODE_ME_CHECK(b.zero_none(home));
if (eq21 == RT_TRUE)
return home.ES_SUBSUMED(*this);
else
GECODE_REWRITE(*this,
(Rel::EqDom<V2,V1>::post(home(*this),x2,x1)));
}
if (eq21 == RT_FALSE) {
GECODE_ME_CHECK(b.one_none(home));
if (eq20 == RT_TRUE)
return home.ES_SUBSUMED(*this);
else
GECODE_REWRITE(*this,
(Rel::EqDom<V2,V0>::post(home(*this),x2,x0)));
}
assert((eq20 != RT_TRUE) || (eq21 != RT_TRUE));
ViewRanges<V0> r0(x0);
ViewRanges<V1> r1(x1);
Iter::Ranges::Union<ViewRanges<V0>,ViewRanges<V1> > u(r0,r1);
if (!shared<V0,V2>(x0,x2) && !shared<V1,V2>(x1,x2))
GECODE_ME_CHECK(x2.inter_r(home,u,false));
else
GECODE_ME_CHECK(x2.inter_r(home,u,true));
return ES_FIX;
}
}}}
// STATISTICS: int-prop
Gecode::Actor
Base-class for both propagators and branchers.
Definition core.hpp:628
Gecode::Actor::dispose
virtual size_t dispose(Space &home)
Delete actor and return its size.
Definition core.hpp:3252
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::Int::BoolView
Boolean view for Boolean variables.
Definition view.hpp:1380
Gecode::Int::Bool::IteBase::IteBase
IteBase(Space &home, IteBase &p)
Constructor for cloning p.
Definition ite.hpp:52
Gecode::Int::Bool::IteBase::x2
V2 x2
Definition bool.hh:585
Gecode::Int::Bool::IteBase::cost
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (defined as low ternary).
Definition ite.hpp:62
Gecode::Int::Bool::IteBase::dispose
virtual size_t dispose(Space &home)
Delete propagator and return its size.
Definition ite.hpp:77
Gecode::Int::Bool::IteBase::b
BoolView b
View for condition.
Definition bool.hh:583
Gecode::Int::Bool::IteBase::x0
V0 x0
Views.
Definition bool.hh:585
Gecode::Int::Bool::IteBase::x1
V1 x1
Definition bool.hh:585
Gecode::Int::Bool::IteBase::reschedule
virtual void reschedule(Space &home)
Schedule function.
Definition ite.hpp:68
Gecode::Int::Bool::IteBnd::copy
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition ite.hpp:100
Gecode::Int::Bool::IteBnd::IteBnd
IteBnd(Space &home, IteBnd &p)
Constructor for cloning p.
Definition ite.hpp:95
Gecode::Int::Bool::IteBnd::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition ite.hpp:119
Gecode::Int::Bool::IteBnd::post
static ExecStatus post(Home home, BoolView b, V0 x0, V1 x1, V2 x2)
Post if-then-else propagator.
Definition ite.hpp:106
Gecode::Int::Bool::IteDom::cost
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (defined as high ternary).
Definition ite.hpp:189
Gecode::Int::Bool::IteDom::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition ite.hpp:198
Gecode::Int::Bool::IteDom::copy
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition ite.hpp:170
Gecode::Int::Bool::IteDom::IteDom
IteDom(Space &home, IteDom &p)
Constructor for cloning p.
Definition ite.hpp:165
Gecode::Int::Bool::IteDom::post
static ExecStatus post(Home home, BoolView b, V0 x0, V1 x1, V2 x2)
Post if-then-else propagator.
Definition ite.hpp:176
Gecode::Int::Rel::EqBnd::post
static ExecStatus post(Home home, View0 x0, View1 x1)
Post bounds consistent propagator .
Definition eq.hpp:108
Gecode::Int::Rel::EqDom::post
static ExecStatus post(Home home, View0 x0, View1 x1)
Post domain consistent propagator .
Definition eq.hpp:176
Gecode::Int::ViewRanges
Range iterator for integer views.
Definition view.hpp:54
Gecode::Iter::Ranges::Union
Range iterator for computing union (binary).
Definition ranges-union.hpp:44
Gecode::PropCost
Propagation cost.
Definition core.hpp:486
Gecode::PropCost::ternary
static PropCost ternary(PropCost::Mod m)
Three variables for modifier pcm.
Definition core.hpp:4805
Gecode::PropCost::LO
@ LO
Cheap.
Definition core.hpp:513
Gecode::PropCost::HI
@ HI
Expensive.
Definition core.hpp:514
Gecode::Propagator::Space
friend class Space
Definition core.hpp:1066
Gecode::Propagator::med
ModEventDelta med
A set of modification events (used during propagation).
Definition core.hpp:1075
Gecode::Propagator::Propagator
Propagator(Home home)
Constructor for posting.
Definition core.hpp:3498
Gecode::Space::ES_FIX_PARTIAL
ExecStatus ES_FIX_PARTIAL(Propagator &p, const ModEventDelta &med)
Propagator p has computed partial fixpoint
Definition core.hpp:3569
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition core.hpp:3563
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition core.hpp:89
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
GECODE_REWRITE
#define GECODE_REWRITE(prop, post)
Rewrite propagator by executing post function.
Definition macros.hpp:116
rel.hh
Gecode::Int::Bool
Boolean propagators.
Gecode::Int
Finite domain integers.
Gecode::Int::rtest_eq_dom
RelTest rtest_eq_dom(VX x, VY y)
Test whether views x and y are equal (use full domain information).
Definition rel-test.hpp:65
Gecode::Int::PC_INT_BND
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition var-type.hpp:91
Gecode::Int::rtest_eq_bnd
RelTest rtest_eq_bnd(VX x, VY y)
Test whether views x and y are equal (use bounds information).
Definition rel-test.hpp:43
Gecode::Int::PC_BOOL_VAL
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value).
Definition var-type.hpp:126
Gecode::Int::PC_INT_DOM
const Gecode::PropCond PC_INT_DOM
Propagate when domain changes.
Definition var-type.hpp:100
Gecode::Int::ME_INT_DOM
const Gecode::ModEvent ME_INT_DOM
Domain operation has changed the domain.
Definition var-type.hpp:72
Gecode::Int::RelTest
RelTest
Result of testing relation.
Definition view.hpp:1734
Gecode::Int::RT_TRUE
@ RT_TRUE
Relation does hold.
Definition view.hpp:1737
Gecode::Int::RT_FALSE
@ RT_FALSE
Relation does not hold.
Definition view.hpp:1735
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::ES_FIX
@ ES_FIX
Propagation has computed fixpoint.
Definition core.hpp:477
Gecode::ES_FAILED
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
Gecode::shared
bool shared(ViewArray< ViewX > x, ViewArray< ViewY > y)
Definition array.hpp:1466
forceinline
#define forceinline
Definition config.hpp:187