text: // Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
  //
  // 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.
  
  //
  // Created by Jiabin on 2019-04-25.
  //
  #pragma once
  
  namespace paddle {
  namespace imperative {
  namespace detail {
  
  struct BackwardStrategy {
    /* DyGraph now support two kinds of backward strategy, one is sorted sum
     * gradient, another is sum gradient once they are created */
    // TODO(jiabin): add more Strategy when we support
    bool sorted_sum_gradient_{false};
  };
  
  }  // namespace detail
  }  // namespace imperative
  }  // namespace paddle
  