Enum TreeError 

pub enum TreeError {
    Empty,
    Malformed {
        node: usize,
        reason: &'static str,
    },
    FeatureOutOfRange {
        node: usize,
        feature: usize,
        n_features: usize,
    },
    RaggedInput {
        len: usize,
        n_features: usize,
    },
}

Why a tree could not be walked or did not hold its invariant.

Variants

Empty

The tree has no nodes: fit has not run, or it failed.

Malformed

A node breaks the leaf/internal invariant. See Tree::validate.

Fields

node: usize

reason: &'static str

FeatureOutOfRange

A node tests a feature the instance does not have.

Fields

node: usize

feature: usize

n_features: usize

RaggedInput

A batch whose length is not a whole number of rows.

Fields

len: usize

n_features: usize

Trait Implementations

impl Clone for TreeError

fn clone(&self) -> TreeError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TreeError

impl Debug for TreeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for TreeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for TreeError

impl Error for TreeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<TreeError> for SearchError

fn from(err: TreeError) -> Self

Converts to this type from the input type.

impl PartialEq for TreeError

fn eq(&self, other: &TreeError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TreeError