text: // Copyright 2005-2020 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.
  
  #ifndef FST_SCRIPT_ARCSORT_H_
  #define FST_SCRIPT_ARCSORT_H_
  
  #include <utility>
  
  #include <fst/types.h>
  #include <fst/arcsort.h>
  #include <fst/script/fst-class.h>
  
  namespace fst {
  namespace script {
  
  enum class ArcSortType : uint8 { ILABEL, OLABEL };
  
  using ArcSortArgs = std::pair<MutableFstClass *, ArcSortType>;
  
  template <class Arc>
  void ArcSort(ArcSortArgs *args) {
    MutableFst<Arc> *fst = std::get<0>(*args)->GetMutableFst<Arc>();
    switch (std::get<1>(*args)) {
      case ArcSortType::ILABEL: {
        const ILabelCompare<Arc> icomp;
        ArcSort(fst, icomp);
        return;
      }
      case ArcSortType::OLABEL: {
        const OLabelCompare<Arc> ocomp;
        ArcSort(fst, ocomp);
        return;
      }
    }
  }
  
  void ArcSort(MutableFstClass *ofst, ArcSortType);
  
  }  // namespace script
  }  // namespace fst
  
  #endif  // FST_SCRIPT_ARCSORT_H_
  