Function BuildTree

tests/cpp/tree/test_tree_stat.cc:86–95

namespace {
void BuildTree(Context const* ctx, DMatrix* p_fmat, GradientContainer* grad,
               std::string const& name, Args const& args, RegTree* p_tree) {
  tree::TrainParam param;
  param.Init(args);
  ObjInfo task{ObjInfo::kRegression};
  auto up = std::unique_ptr<TreeUpdater>{TreeUpdater::Create(name, ctx, &task)};
  up->Configure({});
  std::vector<HostDeviceVector<bst_node_t>> position(1);
  up->Update(&param, grad, p_fmat, common::Span{position}, {p_tree});
}
}  // namespace

/**