Enum CosineComparison 

pub enum CosineComparison {
    Comparable(f32),
    DimensionMismatch {
        query_dim: usize,
        stored_dim: usize,
    },
}

v0.7.0 H7 — dimension-aware outcome of a recall-time cosine comparison between a live query embedding and a stored embedding whose producing model may have changed since the row was written.

Embedder::cosine_similarity collapses a dimension mismatch to 0.0, which is numerically indistinguishable from a genuinely orthogonal pair. That makes an embedder-model switch silent: every legacy-dimension row scores 0.0 on the semantic axis and quietly drops out of the ranking with no operator-visible signal. This enum preserves the same 0.0 numerical fallback at the call site but lets recall count and surface the mismatch instead of swallowing it.

Variants

Comparable(f32)

Both vectors share dimensionality; carries the cosine score.

DimensionMismatch

Stored embedding dimensionality differs from the query’s — almost always the result of a different embedder model. Carries both dimensions so callers can report which model produced what.

Fields

query_dim: usize

Dimensionality of the live query embedding (active model).

stored_dim: usize

Dimensionality of the stored embedding (legacy model).

Trait Implementations

impl Clone for CosineComparison

fn clone(&self) -> CosineComparison

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CosineComparison

impl Debug for CosineComparison

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

Formats the value using the given formatter.

impl PartialEq for CosineComparison

fn eq(&self, other: &CosineComparison) -> 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 CosineComparison