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Define core multi-target regression tree structure. #8884

Merged
merged 5 commits into from
Mar 9, 2023
Merged

Define core multi-target regression tree structure. #8884

merged 5 commits into from
Mar 9, 2023

Commits on Mar 8, 2023

  1. Define core multi-target regression tree structure. 

    - Define a new tree struct embedded in the `RegTree`.
- Provide dispatching functions in `RegTree`.
- Fix some c++-17 warnings about the use of nodiscard (currently we disable the warning on
  the CI).
- Use uint32_t instead of size_t for `bst_target_t` as it has defined size and can be used
  as part of dmlc parameter.
- Hide the `Segment` struct inside categorical split matrix.
    @trivialfis
    trivialfis committed Mar 8, 2023
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  2. fix test.

    @trivialfis
    trivialfis committed Mar 8, 2023
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  3. iwyu.

    @trivialfis
    trivialfis committed Mar 8, 2023
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Commits on Mar 9, 2023

  1. Small cleanups.

    @trivialfis
    trivialfis committed Mar 9, 2023
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  2. Small cleanups.

    @trivialfis
    trivialfis committed Mar 9, 2023
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