Trait datafusion::common::tree_node::ConcreteTreeNode

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pub trait ConcreteTreeNode: Sized {
    // Required methods
    fn children(&self) -> &[Self];
    fn take_children(self) -> (Self, Vec<Self>);
    fn with_new_children(
        self,
        children: Vec<Self>,
    ) -> Result<Self, DataFusionError>;
}
Expand description

Instead of implementing TreeNode, it’s recommended to implement a ConcreteTreeNode for trees that contain nodes with payloads. This approach ensures safe execution of algorithms involving payloads, by enforcing rules for detaching and reattaching child nodes.

Required Methods§

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fn children(&self) -> &[Self]

Provides read-only access to child nodes.

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fn take_children(self) -> (Self, Vec<Self>)

Detaches the node from its children, returning the node itself and its detached children.

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fn with_new_children(self, children: Vec<Self>) -> Result<Self, DataFusionError>

Reattaches updated child nodes to the node, returning the updated node.

Object Safety§

This trait is not object safe.

Implementors§