map.h
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Compatibility file for old-style Map() functions and MapFst class that have
// been renamed to ArcMap (cf. StateMap).
#ifndef FST_MAP_H_
#define FST_MAP_H_
#include <fst/arc-map.h>
namespace fst {
template <class A, class C>
void Map(MutableFst<A> *fst, C *mapper) {
ArcMap(fst, mapper);
}
template <class A, class C>
void Map(MutableFst<A> *fst, C mapper) {
ArcMap(fst, mapper);
}
template <class A, class B, class C>
void Map(const Fst<A> &ifst, MutableFst<B> *ofst, C *mapper) {
ArcMap(ifst, ofst, mapper);
}
template <class A, class B, class C>
void Map(const Fst<A> &ifst, MutableFst<B> *ofst, C mapper) {
ArcMap(ifst, ofst, mapper);
}
using MapFstOptions = ArcMapFstOptions;
template <class A, class B, class C>
class MapFst : public ArcMapFst<A, B, C> {
public:
using FromArc = A;
using ToArc = B;
using StateId = typename ToArc::StateId;
using Weight = typename ToArc::Weight;
using State = CacheState<B>;
MapFst(const Fst<A> &fst, const C &mapper, const MapFstOptions &opts)
: ArcMapFst<A, B, C>(fst, mapper, opts) {}
MapFst(const Fst<A> &fst, C *mapper, const MapFstOptions &opts)
: ArcMapFst<A, B, C>(fst, mapper, opts) {}
MapFst(const Fst<A> &fst, const C &mapper)
: ArcMapFst<A, B, C>(fst, mapper) {}
MapFst(const Fst<A> &fst, C *mapper) : ArcMapFst<A, B, C>(fst, mapper) {}
// See Fst<>::Copy() for doc.
MapFst(const MapFst<A, B, C> &fst, bool safe = false)
: ArcMapFst<A, B, C>(fst, safe) {}
// Get a copy of this MapFst. See Fst<>::Copy() for further doc.
MapFst<A, B, C> *Copy(bool safe = false) const override {
return new MapFst(*this, safe);
}
};
// Specialization for MapFst.
template <class A, class B, class C>
class StateIterator<MapFst<A, B, C>>
: public StateIterator<ArcMapFst<A, B, C>> {
public:
explicit StateIterator(const ArcMapFst<A, B, C> &fst)
: StateIterator<ArcMapFst<A, B, C>>(fst) {}
};
// Specialization for MapFst.
template <class A, class B, class C>
class ArcIterator<MapFst<A, B, C>> : public ArcIterator<ArcMapFst<A, B, C>> {
public:
ArcIterator(const ArcMapFst<A, B, C> &fst, typename A::StateId s)
: ArcIterator<ArcMapFst<A, B, C>>(fst, s) {}
};
// For backwards compatibility only; use IdentityArcMapper otherwise.
template <class A>
struct IdentityMapper {
using FromArc = A;
using ToArc = A;
ToArc operator()(const FromArc &arc) const { return arc; }
constexpr MapFinalAction FinalAction() const { return MAP_NO_SUPERFINAL; }
constexpr MapSymbolsAction InputSymbolsAction() const {
return MAP_COPY_SYMBOLS;
}
constexpr MapSymbolsAction OutputSymbolsAction() const {
return MAP_COPY_SYMBOLS;
}
uint64 Properties(uint64 props) const { return props; }
};
} // namespace fst
#endif // FST_MAP_H_