98 lines
3.4 KiB
C++
98 lines
3.4 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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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2013
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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_SEARCH_NOGOODS_HH
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#define GECODE_SEARCH_NOGOODS_HH
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#include <gecode/search.hh>
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namespace Gecode { namespace Search {
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/// Class for a sentinel no-good literal
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class GECODE_VTABLE_EXPORT NoNGL : public NGL {
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public:
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/// Constructor for creation
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NoNGL(void);
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/// Constructor for creation
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NoNGL(Space& home);
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/// Constructor for cloning \a ngl
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NoNGL(Space& home, NoNGL& ngl);
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/// Subscribe propagator \a p to all views of the no-good literal
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virtual void subscribe(Space& home, Propagator& p);
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/// Schedule propagator \a p for all views of the no-good literal
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virtual void reschedule(Space& home, Propagator& p);
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/// Cancel propagator \a p from all views of the no-good literal
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virtual void cancel(Space& home, Propagator& p);
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/// Test the status of the no-good literal
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virtual NGL::Status status(const Space& home) const;
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/// Propagate the negation of the no-good literal
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virtual ExecStatus prune(Space& home);
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/// Create copy
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virtual NGL* copy(Space& home);
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};
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/// No-good propagator
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class GECODE_SEARCH_EXPORT NoGoodsProp : public Propagator {
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protected:
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/// Root of no-good literal tree
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NGL* root;
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/// Number of no-good literals with subscriptions
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unsigned int n;
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/// Constructor for creation
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NoGoodsProp(Space& home, NGL* root);
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/// Constructor for cloning \a p
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NoGoodsProp(Space& home, NoGoodsProp& p);
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public:
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/// Perform copying during cloning
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virtual Actor* copy(Space& home);
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/// Const function (defined as low unary)
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virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
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/// Schedule function
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virtual void reschedule(Space& home);
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/// Perform propagation
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virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
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/// Post propagator for path \a p
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template<class Path>
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static ExecStatus post(Space& home, const Path& p);
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/// Delete propagator and return its size
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virtual size_t dispose(Space& home);
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};
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}}
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#include <gecode/search/nogoods.hpp>
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#endif
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// STATISTICS: search-other
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