mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-26 21:42:19 +03:00
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
// $Id$
|
|
|
|
/***********************************************************************
|
|
Moses - factored phrase-based language decoder
|
|
Copyright (C) 2006 University of Edinburgh
|
|
|
|
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
|
|
***********************************************************************/
|
|
|
|
#ifndef moses_PartialTranslOptColl_h
|
|
#define moses_PartialTranslOptColl_h
|
|
|
|
#include <list>
|
|
#include <iostream>
|
|
#include "TranslationOption.h"
|
|
#include "Util.h"
|
|
#include "StaticData.h"
|
|
#include "FactorTypeSet.h"
|
|
|
|
namespace Moses
|
|
{
|
|
|
|
/** Contains partial translation options, while these are constructed in the class TranslationOption.
|
|
* The factored translation model allows for multiple translation and
|
|
* generation steps during a single Hypothesis expansion. For efficiency,
|
|
* all these expansions are precomputed and stored as TranslationOption.
|
|
* The expansion process itself may be still explode, so efficient handling
|
|
* of partial translation options during expansion is required.
|
|
* This class assists in this tasks by implementing pruning.
|
|
* This implementation is similar to the one in HypothesisStack.
|
|
*/
|
|
class PartialTranslOptColl
|
|
{
|
|
friend std::ostream& operator<<(std::ostream& out, const PartialTranslOptColl& possibleTranslation);
|
|
|
|
protected:
|
|
std::vector<TranslationOption*> m_list;
|
|
float m_bestScore; /**< score of the best translation option */
|
|
float m_worstScore; /**< score of the worse translation option */
|
|
size_t m_maxSize; /**< maximum number of translation options allowed */
|
|
size_t m_totalPruned; /**< number of options pruned */
|
|
|
|
public:
|
|
PartialTranslOptColl();
|
|
|
|
/** destructor, cleans out list */
|
|
~PartialTranslOptColl() {
|
|
RemoveAllInColl( m_list );
|
|
}
|
|
|
|
void AddNoPrune(TranslationOption *partialTranslOpt);
|
|
void Add(TranslationOption *partialTranslOpt);
|
|
void Prune();
|
|
|
|
/** returns list of translation options */
|
|
const std::vector<TranslationOption*>& GetList() const {
|
|
return m_list;
|
|
}
|
|
|
|
/** clear out the list */
|
|
void DetachAll() {
|
|
m_list.clear();
|
|
}
|
|
|
|
/** return number of pruned partial hypotheses */
|
|
size_t GetPrunedCount() {
|
|
return m_totalPruned;
|
|
}
|
|
|
|
};
|
|
|
|
}
|
|
#endif
|