structs_column_view.hpp

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/*
 * Copyright (c) 2022-2023, NVIDIA 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 <cudf/column/column.hpp>
#include <cudf/column/column_view.hpp>
#include <cudf/utilities/default_stream.hpp>
 
#include <rmm/cuda_stream_view.hpp>
 
namespace cudf {
 
class structs_column_view : public column_view {
 public:
  // Foundation members:
  structs_column_view(structs_column_view const&) = default;  
  structs_column_view(structs_column_view&&)      = default;  
  ~structs_column_view()                          = default;
  structs_column_view& operator=(structs_column_view const&) = default;
  structs_column_view& operator=(structs_column_view&&) = default;
 
  explicit structs_column_view(column_view const& col);
 
  [[nodiscard]] column_view parent() const;
 
  using column_view::child_begin;
  using column_view::child_end;
  using column_view::has_nulls;
  using column_view::null_count;
  using column_view::null_mask;
  using column_view::num_children;
  using column_view::offset;
  using column_view::size;
 
  [[nodiscard]] column_view get_sliced_child(
    int index, rmm::cuda_stream_view stream = cudf::get_default_stream()) const;
};         // class structs_column_view;  // end of group
}  // namespace cudf