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/***********************************************************************
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
#ifndef EXTRACT_GHKM_PARSE_TREE_H_
#define EXTRACT_GHKM_PARSE_TREE_H_
#include <string>
#include <vector>
namespace Moses
{
namespace GHKM
{
class ParseTree
{
public:
ParseTree(const std::string &label)
: m_label(label)
, m_parent(0)
, m_pcfgScore(0.0) {}
~ParseTree();
const std::string &GetLabel() const {
return m_label;
}
const std::vector<ParseTree*> &GetChildren() const {
return m_children;
}
const ParseTree *GetParent() const {
return m_parent;
}
float GetPcfgScore() const {
return m_pcfgScore;
}
void SetParent(ParseTree *);
void SetChildren(const std::vector<ParseTree*> &);
void SetPcfgScore(float score) {
m_pcfgScore = score;
}
void AddChild(ParseTree *);
bool IsLeaf() const;
template<typename OutputIterator>
void GetLeaves(OutputIterator) const;
private:
// Disallow copying
ParseTree(const ParseTree &);
ParseTree &operator=(const ParseTree &);
std::string m_label;
std::vector<ParseTree*> m_children;
ParseTree *m_parent;
float m_pcfgScore; // log probability
};
template<typename OutputIterator>
void ParseTree::GetLeaves(OutputIterator result) const
{
if (IsLeaf()) {
*result++ = this;
} else {
std::vector<ParseTree *>::const_iterator p = m_children.begin();
std::vector<ParseTree *>::const_iterator end = m_children.end();
while (p != end) {
ParseTree &child = **p++;
child.GetLeaves(result);
}
}
}
} // namespace GHKM
} // namespace Moses
#endif
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