Struct RowSubsampleMask 

pub struct RowSubsampleMask {
    pub id: u64,
    pub mask: Option<Arc<OuterScoreSubsample>>,
}

Identifier-carrying handle for a single row subsample mask.

The handle is Clone and cheap to copy; the Arc is shared, not duplicated.

Fields

id: u64

Stable 64-bit content hash. Same mask (by Arc pointer OR by row content) ⇒ same id; different mask ⇒ different id.

mask: Option<Arc<OuterScoreSubsample>>

None means full data (0..n, weight 1.0 per row). Some(_) means the rows and HT weights inside the subsample.

Implementations

impl RowSubsampleMask

pub fn full_data(n: usize) -> RowSubsampleMask

Full-data measure: walk 0..n with weight 1.0 per row.

pub fn subsample(mask: Arc<OuterScoreSubsample>) -> RowSubsampleMask

Subsample measure: walk the mask’s rows with their per-row HT weights. Id is derived from the Arc pointer (cheap and stable for the lifetime of the Arc) combined with mask metadata.

Trait Implementations

impl Clone for RowSubsampleMask

fn clone(&self) -> RowSubsampleMask

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RowSubsampleMask

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

Formats the value using the given formatter.

impl RowSubsampleMaskExt for RowSubsampleMask

fn from_options(options: &BlockwiseFitOptions, n: usize) -> Self

Build a RowSubsampleMask from blockwise-fit options. The outer optimizer is the sole source of outer_score_subsample; inner paths read this once at the top of each TR iteration and freeze it for every quantity in that iteration.