text: #include <vector>
  
  #include "caffe/layers/flatten_layer.hpp"
  
  namespace caffe {
  
  template <typename Dtype>
  void FlattenLayer<Dtype>::Reshape(const vector<Blob<Dtype>*>& bottom,
        const vector<Blob<Dtype>*>& top) {
    CHECK_NE(top[0], bottom[0]) << this->type() << " Layer does not "
        "allow in-place computation.";
    const int start_axis = bottom[0]->CanonicalAxisIndex(
        this->layer_param_.flatten_param().axis());
    const int end_axis = bottom[0]->CanonicalAxisIndex(
        this->layer_param_.flatten_param().end_axis());
    vector<int> top_shape;
    for (int i = 0; i < start_axis; ++i) {
      top_shape.push_back(bottom[0]->shape(i));
    }
    const int flattened_dim = bottom[0]->count(start_axis, end_axis + 1);
    top_shape.push_back(flattened_dim);
    for (int i = end_axis + 1; i < bottom[0]->num_axes(); ++i) {
      top_shape.push_back(bottom[0]->shape(i));
    }
    top[0]->Reshape(top_shape);
    CHECK_EQ(top[0]->count(), bottom[0]->count());
  }
  
  template <typename Dtype>
  void FlattenLayer<Dtype>::Forward_cpu(const vector<Blob<Dtype>*>& bottom,
        const vector<Blob<Dtype>*>& top) {
    top[0]->ShareData(*bottom[0]);
  }
  
  template <typename Dtype>
  void FlattenLayer<Dtype>::Backward_cpu(const vector<Blob<Dtype>*>& top,
        const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom) {
    bottom[0]->ShareDiff(*top[0]);
  }
  
  INSTANTIATE_CLASS(FlattenLayer);
  REGISTER_LAYER_CLASS(Flatten);
  
  }  // namespace caffe
  