mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-11-10 00:47:31 +03:00
64 lines
2.2 KiB
C++
64 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 "ChartTrellisDetour.h"
|
|
|
|
#include <set>
|
|
|
|
namespace Moses {
|
|
|
|
/** A bounded priority queue of ChartTrellisDetour pointers. The top item is
|
|
* the best scoring detour. 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 ChartTrellisDetourQueue {
|
|
public:
|
|
// Create empty queue with fixed capacity of c. Capacity 0 means unbounded.
|
|
ChartTrellisDetourQueue(size_t c) : m_capacity(c) {}
|
|
~ChartTrellisDetourQueue();
|
|
|
|
bool Empty() const { return m_queue.empty(); }
|
|
|
|
// Add the detour 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(const ChartTrellisDetour *detour);
|
|
|
|
// Remove the best-scoring detour from the queue and return it. The
|
|
// caller is responsible for deleting the object.
|
|
const ChartTrellisDetour *Pop();
|
|
|
|
private:
|
|
struct DetourOrderer {
|
|
bool operator()(const ChartTrellisDetour* a,
|
|
const ChartTrellisDetour* b) const {
|
|
return (a->GetTotalScore() > b->GetTotalScore());
|
|
}
|
|
};
|
|
|
|
typedef std::multiset<const ChartTrellisDetour *, DetourOrderer> QueueType;
|
|
|
|
QueueType m_queue;
|
|
const size_t m_capacity;
|
|
};
|
|
|
|
} // namespace Moses
|