mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-25 12:52:29 +03:00
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/***********************************************************************
|
|
Moses - statistical machine translation system
|
|
Copyright (C) 2006-2012 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 "StackLattice.h"
|
|
#include "VarSpanNode.h"
|
|
#include "moses/StackVec.h"
|
|
|
|
#include <vector>
|
|
|
|
namespace Moses
|
|
{
|
|
|
|
class ChartHypothesisCollection;
|
|
|
|
template<typename MatchCallBackType>
|
|
class StackLatticeSearcher
|
|
{
|
|
public:
|
|
StackLatticeSearcher(const StackLattice &lattice,
|
|
const std::vector<VarSpanNode::NonTermRange> &ranges)
|
|
: m_lattice(lattice)
|
|
, m_ranges(ranges) {}
|
|
|
|
void Search(const std::vector<int> &labels, MatchCallBackType &callback) {
|
|
m_labels = &labels;
|
|
m_matchCB = &callback;
|
|
SearchInner(0, 0);
|
|
}
|
|
|
|
private:
|
|
void SearchInner(int start, size_t index) {
|
|
assert(m_stackVec.size() == index);
|
|
|
|
const VarSpanNode::NonTermRange &range = m_ranges[index];
|
|
|
|
const size_t offset = (range.s1 == range.s2) ? range.s1 : start;
|
|
|
|
const size_t minSpan = std::max(offset, range.e1) - offset + 1;
|
|
const size_t maxSpan = range.e2 - offset + 1;
|
|
|
|
// Loop over all possible spans for this offset and index.
|
|
const std::vector<StackVec> &spanVec = m_lattice[offset][index];
|
|
|
|
for (size_t j = minSpan; j <= maxSpan; ++j) {
|
|
const ChartCellLabel *stack = spanVec[j][(*m_labels)[index]];
|
|
if (!stack) {
|
|
continue;
|
|
}
|
|
m_stackVec.push_back(stack);
|
|
if (index+1 == m_labels->size()) {
|
|
(*m_matchCB)(m_stackVec);
|
|
} else {
|
|
SearchInner(offset+j, index+1);
|
|
}
|
|
m_stackVec.pop_back();
|
|
}
|
|
}
|
|
|
|
const StackLattice &m_lattice;
|
|
const std::vector<VarSpanNode::NonTermRange> &m_ranges;
|
|
const std::vector<int> *m_labels;
|
|
MatchCallBackType *m_matchCB;
|
|
StackVec m_stackVec;
|
|
};
|
|
|
|
} // namespace Moses
|