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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2008
*
* 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_SEARCH_SUPPORT_HH
#define GECODE_SEARCH_SUPPORT_HH
#include <gecode/search.hh>
namespace Gecode { namespace Search {
/// Clone space \a s depending on options \a o
forceinline Space*
snapshot(Space* s, const Options& o);
/// Virtualize a worker to an engine
template<class Worker>
class WorkerToEngine : public Engine {
protected:
/// The worker to wrap into an engine
Worker w;
public:
/// Initialization
WorkerToEngine(Space* s, const Options& o);
/// Return next solution (nullptr, if none exists or search has been stopped)
virtual Space* next(void);
/// Return statistics
virtual Search::Statistics statistics(void) const;
/// Check whether engine has been stopped
virtual bool stopped(void) const;
/// Constrain future solutions to be better than \a b
virtual void constrain(const Space& b);
/// Reset engine to restart at space \a s
virtual void reset(Space* s);
/// Return no-goods
virtual NoGoods& nogoods(void);
};
forceinline Space*
snapshot(Space* s, const Options& o) {
return o.clone ? s->clone() : s;
}
template<class Worker>
WorkerToEngine<Worker>::WorkerToEngine(Space* s, const Options& o)
: w(s,o) {}
template<class Worker>
Space*
WorkerToEngine<Worker>::next(void) {
return w.next();
}
template<class Worker>
Search::Statistics
WorkerToEngine<Worker>::statistics(void) const {
return w.statistics();
}
template<class Worker>
bool
WorkerToEngine<Worker>::stopped(void) const {
return w.stopped();
}
template<class Worker>
void
WorkerToEngine<Worker>::reset(Space* s) {
w.reset(s);
}
template<class Worker>
void
WorkerToEngine<Worker>::constrain(const Space& b) {
w.constrain(b);
}
template<class Worker>
NoGoods&
WorkerToEngine<Worker>::nogoods(void) {
return w.nogoods();
}
}}
#endif
// STATISTICS: search-other
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