mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-27 05:55:02 +03:00
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
/***********************************************************************
|
|
Moses - statistical machine translation system
|
|
Copyright (C) 2006-2011 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
|
|
***********************************************************************/
|
|
|
|
#pragma once
|
|
|
|
#include <set>
|
|
|
|
namespace Moses
|
|
{
|
|
|
|
// pair of Bleu score and index
|
|
typedef std::pair<float, size_t> BleuIndexPair;
|
|
|
|
// A bounded priority queue of BleuIndexPairs. The top item is
|
|
// the best scoring hypothesis. The queue assumes ownership of pushed items and
|
|
// relinquishes ownership when they are popped. Any remaining items at the
|
|
// time of the queue's destruction are deleted.
|
|
class HypothesisQueue
|
|
{
|
|
|
|
public:
|
|
// Create empty queue with fixed capacity of c. Capacity 0 means unbounded.
|
|
HypothesisQueue(size_t c) : m_capacity(c) {}
|
|
~HypothesisQueue();
|
|
|
|
bool Empty() {
|
|
return m_queue.empty();
|
|
}
|
|
|
|
// Add the hypo to the queue or delete it if the queue is full and the
|
|
// score is no better than the queue's worst score.
|
|
void Push(BleuIndexPair hypo);
|
|
|
|
// Remove the best-scoring detour from the queue and return it. The
|
|
// caller is responsible for deleting the object.
|
|
BleuIndexPair Pop();
|
|
|
|
private:
|
|
struct HypothesisOrderer {
|
|
bool operator()(BleuIndexPair a,
|
|
BleuIndexPair b) {
|
|
return (a.first > b.first);
|
|
}
|
|
};
|
|
|
|
typedef std::multiset<BleuIndexPair, HypothesisOrderer> HypoQueueType;
|
|
//typedef std::set<BleuIndexPair, HypothesisOrderer> HypoQueueType;
|
|
|
|
HypoQueueType m_queue;
|
|
const size_t m_capacity;
|
|
};
|
|
|
|
} // namespace Moses
|