StdToLatticeMapper< Real > Class Template Reference

Class StdToLatticeMapper maps a normal arc (StdArc) to a LatticeArc by putting the StdArc weight as the first element of the LatticeWeight. More...

#include <lattice-utils.h>

Public Member Functions
LatticeArc	operator() (const StdArc &arc)
MapFinalAction	FinalAction ()
MapSymbolsAction	InputSymbolsAction ()
MapSymbolsAction	OutputSymbolsAction ()
uint64	Properties (uint64 props)

Private Types
typedef LatticeWeightTpl< Real >	LatticeWeight
typedef ArcTpl< LatticeWeight >	LatticeArc

Detailed Description

template<class Real>
class fst::StdToLatticeMapper< Real >

Class StdToLatticeMapper maps a normal arc (StdArc) to a LatticeArc by putting the StdArc weight as the first element of the LatticeWeight.

Useful when doing LM rescoring.

Definition at line 196 of file lattice-utils.h.

Member Typedef Documentation

LatticeArc

typedef ArcTpl<LatticeWeight> LatticeArc

private

Definition at line 198 of file lattice-utils.h.

LatticeWeight

typedef LatticeWeightTpl<Real> LatticeWeight

private

Definition at line 197 of file lattice-utils.h.

Member Function Documentation

FinalAction()

MapFinalAction FinalAction ( )

inline

Definition at line 211 of file lattice-utils.h.

{ return MAP_NO_SUPERFINAL; }

InputSymbolsAction()

MapSymbolsAction InputSymbolsAction ( )

inline

Definition at line 213 of file lattice-utils.h.

{ return MAP_COPY_SYMBOLS; }

operator()()

LatticeArc operator() ( const StdArc &  arc )

inline

Definition at line 200 of file lattice-utils.h.

                                           {
    // Note: we have to check whether the arc's weight is zero below,
    // and if so return (infinity, infinity) and not (infinity, zero),
    // because (infinity, zero) is not a valid LatticeWeight, which should
    // either be both finite, or both infinite (i.e. Zero()).
    return LatticeArc(arc.ilabel, arc.olabel,
                      LatticeWeight(arc.weight.Value(),
                                    arc.weight == StdArc::Weight::Zero() ?
                                    arc.weight.Value() : 0.0),
                      arc.nextstate);
  }

OutputSymbolsAction()

MapSymbolsAction OutputSymbolsAction ( )

inline

Definition at line 215 of file lattice-utils.h.

{ return MAP_COPY_SYMBOLS; }

Properties()

uint64 Properties ( uint64  props )

inline

Definition at line 218 of file lattice-utils.h.

{ return props; }

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The documentation for this class was generated from the following file:

• fstext/lattice-utils.h