phi-fst.cc

Go to the documentation of this file.

// Copyright 2005-2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the 'License');
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an 'AS IS' BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.

#include <fst/extensions/special/phi-fst.h>

#include <fst/flags.h>
#include <fst/arc.h>
#include <fst/register.h>

DEFINE_int64(phi_fst_phi_label, 0,
             "Label of transitions to be interpreted as phi ('failure') "
             "transitions");
DEFINE_bool(phi_fst_phi_loop, true,
            "When true, a phi self loop consumes a symbol");
DEFINE_string(phi_fst_rewrite_mode, "auto",
              "Rewrite both sides when matching? One of:"
              " \"auto\" (rewrite iff acceptor), \"always\", \"never\"");

namespace fst {

REGISTER_FST(PhiFst, StdArc);
REGISTER_FST(PhiFst, LogArc);
REGISTER_FST(PhiFst, Log64Arc);

REGISTER_FST(InputPhiFst, StdArc);
REGISTER_FST(InputPhiFst, LogArc);
REGISTER_FST(InputPhiFst, Log64Arc);

REGISTER_FST(OutputPhiFst, StdArc);
REGISTER_FST(OutputPhiFst, LogArc);
REGISTER_FST(OutputPhiFst, Log64Arc);

}  // namespace fst