syntax = "proto3";

option cc_enable_arenas = true;

package tensorflow.boosted_trees.learner;

import "tensorflow/contrib/boosted_trees/proto/tree_config.proto";

// Gathered information for a split node.
message SplitInfo {
  // The split node without the child nodes attached.
  tensorflow.boosted_trees.trees.TreeNode split_node = 1;

  // Left Leaf node.
  tensorflow.boosted_trees.trees.Leaf left_child = 2;

  // Right Leaf node.
  tensorflow.boosted_trees.trees.Leaf right_child = 3;
}

message ObliviousSplitInfo {
  tensorflow.boosted_trees.trees.TreeNode split_node = 1;
  repeated tensorflow.boosted_trees.trees.Leaf children = 2;
  // For each child, children_parent_id stores the node_id of its parent when it
  // was a leaf. For the idx-th child it corresponds the idx/2-th
  // children_parent_id.
  repeated int32 children_parent_id = 3;
}