Enum UnknownCategoryPolicy 

pub enum UnknownCategoryPolicy {
    Error,
    MapToOther {
        other_code: u64,
    },
    MapToNull,
    ExtendDictionary,
}

Policy for intern_with_policy when a byte sequence is not in the dictionary AND the dictionary is frozen.

• Error: return Err(UnknownCategory). Strictest. Recommended for safety-critical inference pipelines where a previously-unseen category indicates a real data issue.
• MapToOther: return the code of a designated “Other” bucket. The bucket must be added before freezing — the dictionary does not silently create one.
• MapToNull: return Ok(None), signalling the caller should mark the row as null in the categorical column’s null bitmap.
• ExtendDictionary: ignore the frozen flag and add the value. Only safe in training; never in inference.

Variants

Error

MapToOther

Fields

other_code: u64

MapToNull

ExtendDictionary

Trait Implementations

impl Clone for UnknownCategoryPolicy

fn clone(&self) -> UnknownCategoryPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnknownCategoryPolicy

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

Formats the value using the given formatter.

impl PartialEq for UnknownCategoryPolicy

fn eq(&self, other: &UnknownCategoryPolicy) -> 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 Eq for UnknownCategoryPolicy

impl StructuralPartialEq for UnknownCategoryPolicy