MertPrune.h

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//Copyright (c) 2012, University of Cambridge
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#ifndef MERT_PRUNE_H_
#define MERT_PRUNE_H_

#include <fst/fstlib.h>
#include <map>
#include <set>
#include <utility>
#include "function-weight.h"

typedef pair<FunctionArc::StateId, FunctionArc::StateId> StatePair;

struct PruneStats {
  PruneStats();

  unsigned int before;
  unsigned int after;
};

void Prune (fst::MutableFst<FunctionArc> *, PruneStats&);

void Prune (fst::MutableFst<FunctionArc> *);

void FullPrune (fst::MutableFst<FunctionArc> *,
                const std::vector<FunctionWeight>&);

void FullPrune (fst::MutableFst<FunctionArc> *,
                const std::vector<FunctionWeight>&, PruneStats&);

int ArcCount (const fst::Fst<FunctionArc>&);

#endif /* MERT_PRUNE_H_ */