mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-09-11 11:25:40 +03:00
136 lines
3.5 KiB
C++
136 lines
3.5 KiB
C++
// $Id$
|
|
// 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 "RuleCubeItem.h"
|
|
|
|
#include <boost/functional/hash.hpp>
|
|
#include <boost/unordered_set.hpp>
|
|
#include <boost/version.hpp>
|
|
|
|
#include "util/exception.hh"
|
|
#include <queue>
|
|
#include <set>
|
|
#include <vector>
|
|
|
|
namespace Moses
|
|
{
|
|
|
|
class ChartCellCollection;
|
|
class ChartManager;
|
|
class ChartTranslationOptions;
|
|
|
|
/** Define an ordering between RuleCubeItems based on their scores.
|
|
* This is used to order items in the cube's priority queue.
|
|
*/
|
|
class RuleCubeItemScoreOrderer
|
|
{
|
|
public:
|
|
bool operator()(const RuleCubeItem *p, const RuleCubeItem *q) const {
|
|
return p->GetScore() < q->GetScore();
|
|
}
|
|
};
|
|
|
|
/** @todo what is this?
|
|
*/
|
|
class RuleCubeItemHasher
|
|
{
|
|
public:
|
|
size_t operator()(const RuleCubeItem *p) const {
|
|
size_t seed = 0;
|
|
const std::vector<HypothesisDimension> &hypoDim = p->GetHypothesisDimensions();
|
|
const ChartTranslationOption *transOpt = p->GetTranslationDimension().GetTranslationOption().get();
|
|
|
|
boost::hash_combine(seed, hypoDim);
|
|
boost::hash_combine(seed, transOpt);
|
|
|
|
return seed;
|
|
}
|
|
};
|
|
|
|
/** @todo what is this?
|
|
*/
|
|
class RuleCubeItemEqualityPred
|
|
{
|
|
public:
|
|
bool operator()(const RuleCubeItem *p, const RuleCubeItem *q) const {
|
|
bool ret = p->GetHypothesisDimensions() == q->GetHypothesisDimensions() &&
|
|
p->GetTranslationDimension() == q->GetTranslationDimension();
|
|
return ret;
|
|
}
|
|
};
|
|
|
|
/** @todo what is this?
|
|
*/
|
|
class RuleCube
|
|
{
|
|
friend std::ostream& operator<<(std::ostream &out, const RuleCube &obj);
|
|
|
|
public:
|
|
RuleCube(const ChartTranslationOptions &, const ChartCellCollection &,
|
|
ChartManager &);
|
|
|
|
~RuleCube();
|
|
|
|
float GetTopScore() const {
|
|
UTIL_THROW_IF2(m_queue.empty(), "Empty queue, nothing to pop");
|
|
RuleCubeItem *item = m_queue.top();
|
|
return item->GetScore();
|
|
}
|
|
|
|
RuleCubeItem *Pop(ChartManager &);
|
|
|
|
bool IsEmpty() const {
|
|
return m_queue.empty();
|
|
}
|
|
|
|
const ChartTranslationOptions &GetTranslationOption() const {
|
|
return m_transOpt;
|
|
}
|
|
|
|
size_t GetItemSetSize() const
|
|
{ return m_covered.size(); }
|
|
|
|
private:
|
|
typedef boost::unordered_set<RuleCubeItem*,
|
|
RuleCubeItemHasher,
|
|
RuleCubeItemEqualityPred
|
|
> ItemSet;
|
|
|
|
typedef std::priority_queue<RuleCubeItem*,
|
|
std::vector<RuleCubeItem*>,
|
|
RuleCubeItemScoreOrderer
|
|
> Queue;
|
|
|
|
RuleCube(const RuleCube &); // Not implemented
|
|
RuleCube &operator=(const RuleCube &); // Not implemented
|
|
|
|
void CreateNeighbors(const RuleCubeItem &, ChartManager &);
|
|
void CreateNeighbor(const RuleCubeItem &, int, ChartManager &);
|
|
|
|
const ChartTranslationOptions &m_transOpt;
|
|
ItemSet m_covered;
|
|
Queue m_queue;
|
|
};
|
|
|
|
}
|