mosesdecoder/moses/RuleCubeQueue.h

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// $Id$
// vim:tabstop=2
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2010 Hieu Hoang
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
***********************************************************************/
#pragma once
#include "RuleCube.h"
#include <queue>
#include <vector>
namespace Moses
{
class ChartManager;
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/** Define an ordering between RuleCube based on their best item scores. This
* is used to order items in the priority queue.
*/
class RuleCubeOrderer
{
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public:
bool operator()(const RuleCube *p, const RuleCube *q) const {
return p->GetTopScore() < q->GetTopScore();
}
};
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/** @todo how is this used */
class RuleCubeQueue
{
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public:
RuleCubeQueue(ChartManager &manager) : m_manager(manager) {}
~RuleCubeQueue();
void Add(RuleCube *);
ChartHypothesis *Pop();
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bool IsEmpty() const {
return m_queue.empty();
}
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private:
typedef std::priority_queue<RuleCube*, std::vector<RuleCube*>,
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RuleCubeOrderer > Queue;
Queue m_queue;
ChartManager &m_manager;
};
}