Jip J. Dekker
981be2067e
git-subtree-dir: software/gecode_on_replay git-subtree-split: 8051d92b9c89e49cccfbd1c201371580d7703ab4
112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christopher Mears <Chris.Mears@monash.edu>
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*
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* Contributing authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christopher Mears, 2011
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* Christian Schulte, 2011
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef GECODE_INT_PRECEDE_HH
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#define GECODE_INT_PRECEDE_HH
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#include <gecode/int.hh>
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/**
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* \namespace Gecode::Int::Precede
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* \brief Value precedence propagators
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*/
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namespace Gecode { namespace Int { namespace Precede {
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/**
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* \brief Single value precedence propagator
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*
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* The propagator is based on: Yat Chiu Law and Jimmy H.M. Lee,
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* Global Constraints for Integer and Set Value Precedence,
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* CP 2004, 362--376.
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*
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* Requires \code #include <gecode/int/precede.hh> \endcode
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* \ingroup FuncIntProp
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*/
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template<class View>
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class Single : public NaryPropagator<View,PC_INT_NONE> {
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protected:
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using NaryPropagator<View,PC_INT_NONE>::x;
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/// %Advisors for views (by position in array)
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class Index : public Advisor {
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public:
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/// The position of the view in the view array
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int i;
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/// Create index advisor
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Index(Space& home, Propagator& p, Council<Index>& c, int i);
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/// Clone index advisor \a a
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Index(Space& home, Index& a);
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};
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/// The advisor council
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Council<Index> c;
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/// The value \a s must precede \a t
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int s, t;
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/// Pointers updated during propagation
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int alpha, beta, gamma;
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/// Update the alpha pointer
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ExecStatus updateAlpha(Space& home);
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/// Update the beta pointer
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ExecStatus updateBeta(Space& home);
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/// Constructor for posting
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Single(Home home, ViewArray<View>& x, int s, int t, int beta, int gamma);
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/// Constructor for cloning \a p
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Single(Space& home, Single<View>& p);
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public:
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/// Copy propagator during cloning
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virtual Propagator* copy(Space& home);
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/// Cost function
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virtual PropCost cost(const Space&, const ModEventDelta&) const;
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/// Schedule function
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virtual void reschedule(Space& home);
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/// Delete propagator and return its size
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virtual size_t dispose(Space& home);
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/// Give advice to propagator
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virtual ExecStatus advise(Space& home, Advisor& a, const Delta& d);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator that \a s precedes \a t in \a x
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static ExecStatus post(Home home, ViewArray<View>& x, int s, int t);
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};
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}}}
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#include <gecode/int/precede/single.hpp>
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#endif
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// STATISTICS: int-prop
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