Trait LeafLoss 

pub trait LeafLoss: Send + Sync {
    // Required method
    fn cost(&self, leaf: Leaf<'_>) -> (Cost, usize);
}

A caller’s leaf loss: (cost, class predicted). The cost of a tree is the sum of the costs of its leaves, and a cost must be non-negative.

Required Methods

fn cost(&self, leaf: Leaf<'_>) -> (Cost, usize)

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors