text: // Copyright 2016 Google Inc.
  //
  // 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.!
  
  #ifndef WORD_MODEL_TRAINER_H_
  #define WORD_MODEL_TRAINER_H_
  
  #include "sentencepiece_model.pb.h"
  #include "trainer_interface.h"
  
  namespace sentencepiece {
  namespace word {
  
  // Trainer class for word model.
  //
  // Word model simply counts the frequency of
  // space-delimited tokens, then keep top
  // |vocab_size| frequent tokens.
  
  // word 训练模型的训练器类
  class Trainer : public TrainerInterface {
   public:
    Trainer(const TrainerSpec &trainer_spec,
            const NormalizerSpec &normalizer_spec)
        : TrainerInterface::TrainerInterface(trainer_spec, normalizer_spec) {}
  
    util::Status Train() override;
  };
  }  // namespace word
  }  // namespace sentencepiece
  #endif  // WORD_MODEL_TRAINER_H_
  