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73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/***********************************************************************
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Moses - statistical machine translation system
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Copyright (C) 2006-2011 University of Edinburgh
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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***********************************************************************/
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#pragma once
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#ifndef EXTRACT_GHKM_COMPOSED_RULE_H_
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#define EXTRACT_GHKM_COMPOSED_RULE_H_
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#include "Subgraph.h"
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#include <vector>
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#include <queue>
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namespace Moses
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{
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namespace GHKM
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{
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class Node;
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struct Options;
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class ComposedRule
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{
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public:
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// Form a 'trivial' ComposedRule from a single existing rule.
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ComposedRule(const Subgraph &baseRule);
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// Returns the first open attachment point if any exist or 0 otherwise.
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const Node *GetOpenAttachmentPoint();
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// Close the first open attachment point without attaching a rule.
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void CloseAttachmentPoint();
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// Attempts to produce a new composed rule by attaching a given rule at the
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// first open attachment point. This will fail if the proposed rule violates
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// the constraints set in the Options object, in which case the function
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// returns 0.
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ComposedRule *AttemptComposition(const Subgraph &, const Options &) const;
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// Constructs a Subgraph object corresponding to the composed rule.
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Subgraph CreateSubgraph();
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private:
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ComposedRule(const ComposedRule &, const Subgraph &, int);
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const Subgraph &m_baseRule;
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std::vector<const Subgraph *> m_attachedRules;
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std::queue<const Node *> m_openAttachmentPoints;
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int m_depth;
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int m_size;
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int m_nodeCount;
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};
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} // namespace GHKM
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} // namespace Moses
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#endif
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