Struct RRFFusion 

pub struct RRFFusion { /* private fields */ }

Reciprocal Rank Fusion combiner

Implementations

impl RRFFusion

pub fn new(config: RRFConfig) -> Self

Create a new RRF fusion combiner

pub fn fuse( &self, vector_results: &[(DocId, f32)], lexical_results: &[(DocId, f32)], limit: usize, keep_details: bool, ) -> Vec<SearchResult>

Fuse vector and lexical search results

Arguments

• vector_results - Results from vector search, sorted by score descending
• lexical_results - Results from lexical search, sorted by score descending
• limit - Maximum number of results to return
• keep_details - Whether to include component scores

Returns

Fused results sorted by combined score descending

pub fn fuse_multi( &self, result_lists: &[(&[(DocId, f32)], f32)], limit: usize, ) -> Vec<SearchResult>

Fuse multiple result lists with custom weights

CROSS-CRATE INVARIANT: the RRF kernel here — weight / (k + rank) with rank 1-indexed — must stay numerically identical to sochdb_query::fuse_rrf_weighted. The two crates are siblings (neither depends on the other), so the formula is pinned independently in each by a golden test (test_fuse_multi_rrf_formula_golden here and test_fuse_rrf_weighted_is_1_indexed_and_weighted there); divergence on either side fails that crate’s test.

Trait Implementations

impl Default for RRFFusion

fn default() -> Self

Returns the “default value” for a type.