101 lines
2.8 KiB
C++
101 lines
2.8 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, 2015
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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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#include <gecode/search/seq/dead.hh>
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namespace Gecode { namespace Search { namespace Seq {
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/// A dead engine (failed root)
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template<class Tracer>
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class GECODE_SEARCH_EXPORT Dead : public Engine {
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protected:
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/// Search tracer
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Tracer tracer;
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/// Statistics
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Statistics stat;
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public:
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/// Initialize
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Dead(const Options& o, const Statistics& stat0);
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/// Return next solution (nullptr, if none exists or search has been stopped)
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virtual Space* next(void);
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/// Return statistics
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virtual Statistics statistics(void) const;
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/// Check whether engine has been stopped
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virtual bool stopped(void) const;
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/// Delete
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virtual ~Dead(void);
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};
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template<class Tracer>
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Dead<Tracer>::Dead(const Options& o, const Statistics& stat0)
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: tracer(o.tracer), stat(stat0) {
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tracer.engine(SearchTracer::EngineType::AOE, 1U);
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tracer.worker();
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}
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template<class Tracer>
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Space*
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Dead<Tracer>::next(void) {
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return nullptr;
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}
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template<class Tracer>
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bool
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Dead<Tracer>::stopped(void) const {
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return false;
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}
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template<class Tracer>
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Statistics
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Dead<Tracer>::statistics(void) const {
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return stat;
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}
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template<class Tracer>
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Dead<Tracer>::~Dead(void) {
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tracer.done();
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}
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Engine*
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dead(const Options& o, const Statistics& stat) {
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if (o.tracer)
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return new Dead<TraceRecorder>(o,stat);
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else
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return new Dead<NoTraceRecorder>(o,stat);
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}
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}}}
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// STATISTICS: search-seq
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