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Define core multi-target regression tree structure. (#8884)

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- 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 a defined size and can be used
  as part of dmlc parameter.
- Hide the `Segment` struct inside the categorical split matrix.
This commit is contained in:
Jiaming Yuan
2023-03-09 19:03:06 +08:00
committed by GitHub
parent 46dfcc7d22
commit 5feee8d4a9
16 changed files with 809 additions and 264 deletions
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2
tests/cpp/tree/test_tree_model.cc
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@@ -477,7 +477,7 @@ TEST(Tree, JsonIO) {
auto tparam = j_tree["tree_param"];
ASSERT_EQ(get<String>(tparam["num_feature"]), "0");
ASSERT_EQ(get<String>(tparam["num_nodes"]), "3");
ASSERT_EQ(get<String>(tparam["size_leaf_vector"]), "0");
ASSERT_EQ(get<String>(tparam["size_leaf_vector"]), "1");
ASSERT_EQ(get<I32Array const>(j_tree["left_children"]).size(), 3ul);
ASSERT_EQ(get<I32Array const>(j_tree["right_children"]).size(), 3ul);