/usr/include/gecode/int/circuit.hh is in libgecode-dev 4.4.0-5.
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/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2006
*
* Last modified:
* $Date: 2011-05-25 16:56:41 +0200 (Wed, 25 May 2011) $ by $Author: schulte $
* $Revision: 12022 $
*
* 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
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __GECODE_INT_CIRCUIT_HH__
#define __GECODE_INT_CIRCUIT_HH__
#include <gecode/int.hh>
#include <gecode/int/distinct.hh>
/**
* \namespace Gecode::Int::Circuit
* \brief %Circuit propagators
*/
namespace Gecode { namespace Int { namespace Circuit {
/**
* \brief Base-class for circuit propagator
*
* Provides routines for checking that the induced variable value graph
* is strongly connected and for pruning short cycles.
*
*/
template<class View, class Offset>
class Base : public NaryPropagator<View,Int::PC_INT_DOM> {
protected:
using NaryPropagator<View,Int::PC_INT_DOM>::x;
/// Array for performing value propagation for distinct
ViewArray<View> y;
/// Offset transformation
Offset o;
/// Constructor for cloning \a p
Base(Space& home, bool share, Base& p);
/// Constructor for posting
Base(Home home, ViewArray<View>& x, Offset& o);
/// Check whether the view value graph is strongly connected
ExecStatus connected(Space& home);
/// Ensure path property: prune edges that could give to small cycles
ExecStatus path(Space& home);
public:
/// Delete propagator and return its size
virtual size_t dispose(Space& home);
};
/**
* \brief "Value-consistent" circuit propagator
*
* Propagates value-consistent distinct, checks that
* the induced variable value graph is stronlgy connected, and
* prunes too short cycles.
*
* Requires \code #include <gecode/int/circuit.hh> \endcode
* \ingroup FuncIntProp
*/
template<class View, class Offset>
class Val : public Base<View,Offset> {
protected:
using Base<View,Offset>::x;
using Base<View,Offset>::y;
using Base<View,Offset>::connected;
using Base<View,Offset>::path;
using Base<View,Offset>::o;
/// Constructor for cloning \a p
Val(Space& home, bool share, Val& p);
/// Constructor for posting
Val(Home home, ViewArray<View>& x, Offset& o);
public:
/// Copy propagator during cloning
virtual Actor* copy(Space& home, bool share);
/// Cost function (returns high linear)
virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
/// Perform propagation
virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
/// Post propagator for circuit on \a x
static ExecStatus post(Home home, ViewArray<View>& x, Offset& o);
};
/**
* \brief "Domain consistent" circuit propagator
*
* Propagates domain consistent distinct, checks that
* the induced variable value graph is stronlgy connected, and
* prunes too shot cycles.
*
* Requires \code #include <gecode/int/circuit.hh> \endcode
* \ingroup FuncIntProp
*/
template<class View, class Offset>
class Dom : public Base<View,Offset> {
protected:
using Base<View,Offset>::x;
using Base<View,Offset>::y;
using Base<View,Offset>::connected;
using Base<View,Offset>::path;
using Base<View,Offset>::o;
/// Propagation controller for propagating distinct
Int::Distinct::DomCtrl<View> dc;
/// Constructor for cloning \a p
Dom(Space& home, bool share, Dom& p);
/// Constructor for posting
Dom(Home home, ViewArray<View>& x, Offset& o);
public:
/// Copy propagator during cloning
virtual Actor* copy(Space& home, bool share);
/**
* \brief Cost function
*
* If in stage for naive value propagation, the cost is
* low linear. Otherwise it is high quadratic.
*/
virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
/// Perform propagation
virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
/// Post propagator for circuit on \a x
static ExecStatus post(Home home, ViewArray<View>& x, Offset& o);
};
}}}
#include <gecode/int/circuit/base.hpp>
#include <gecode/int/circuit/val.hpp>
#include <gecode/int/circuit/dom.hpp>
#endif
// STATISTICS: int-prop
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