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65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 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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#include "Factor.h"
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#include "Word.h"
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#include <boost/functional/hash.hpp>
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#include <boost/unordered_set.hpp>
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#include <set>
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namespace Moses
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{
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/** Functor to create hash for words.
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* @todo uses all factors, not just factor 0
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*/
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class NonTerminalHasher
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{
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public:
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size_t operator()(const Word & k) const {
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// Assumes that only the first factor is relevant.
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const Factor * f = k[0];
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return hash_value(*f);
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}
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};
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/** Functor to test whether 2 words are the same
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* @todo uses all factors, not just factor 0
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*/
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class NonTerminalEqualityPred
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{
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public:
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bool operator()(const Word & k1, const Word & k2) const {
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// Assumes that only the first factor is relevant.
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const Factor * f1 = k1[0];
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const Factor * f2 = k2[0];
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return !(f1->Compare(*f2));
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}
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};
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typedef boost::unordered_set<Word,
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NonTerminalHasher,
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NonTerminalEqualityPred> NonTerminalSet;
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} // namespace Moses
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