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#ifndef _PHRASETABLE_FST_H_
#define _PHRASETABLE_FST_H_
#include <vector>
#include <string>
#include "sparse_vector.h"
#include "trule.h"
class TargetPhraseSet {
public:
virtual ~TargetPhraseSet();
virtual const std::vector<TRulePtr>& GetRules() const = 0;
};
class FSTNode {
public:
virtual ~FSTNode();
virtual const TargetPhraseSet* GetTranslations() const = 0;
virtual bool HasData() const = 0;
virtual bool HasOutgoingNonEpsilonEdges() const = 0;
virtual const FSTNode* Extend(const WordID& t) const = 0;
// these should only be called on q_0:
virtual void AddPassThroughTranslation(const WordID& w, const SparseVector<double>& feats) = 0;
virtual void ClearPassThroughTranslations() = 0;
};
// attn caller: you own the memory
FSTNode* LoadTextPhrasetable(const std::vector<std::string>& filenames);
FSTNode* LoadTextPhrasetable(std::istream* in);
FSTNode* LoadBinaryPhrasetable(const std::string& fname_prefix);
#endif
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