text: //*****************************************************************************
  // Copyright 2017-2018 Intel Corporation
  //
  // 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.
  //*****************************************************************************
  
  #pragma once
  
  #include "ngraph/pass/pass.hpp"
  
  namespace ngraph
  {
      namespace pass
      {
          class CommonSubexpressionElimination;
      }
  }
  
  class ngraph::pass::CommonSubexpressionElimination : public FunctionPass
  {
  public:
      CommonSubexpressionElimination()
          : FunctionPass()
      {
      }
  
      CommonSubexpressionElimination(
          const std::unordered_map<std::type_index,
                                   std::function<bool(std::shared_ptr<Node>, std::shared_ptr<Node>)>>&
              backend_cse_handlers)
          : FunctionPass()
          , m_backend_cse_handlers(backend_cse_handlers)
      {
      }
  
      std::unordered_map<std::type_index,
                         std::function<bool(std::shared_ptr<Node>, std::shared_ptr<Node>)>>
          m_backend_cse_handlers;
  
      virtual bool run_on_function(std::shared_ptr<ngraph::Function> f);
  };
  