Struct SynonymMap 

pub struct SynonymMap(/* private fields */);

A canonical-form → synonym-list lookup table.

Built from tab-separated data via SynonymMap::from_tsv. Lookup is O(log n) via BTreeMap (suitable for sets up to ~5 000 entries; use an FST-backed map for larger corpora).

Implementations

impl SynonymMap

pub fn empty() -> Self

Create an empty SynonymMap (no expansions).

pub fn from_tsv(data: &str) -> Self

Parse a tab-separated synonym table.

Format: canonical\tsyn1\tsyn2\t… — one rule per line. Lines beginning with # and blank lines are skipped. Lines with fewer than two tab-separated fields are skipped silently.

pub fn expand(&self, word: &str) -> Option<&[String]>

Look up synonym expansions for word.

Returns None if word has no entry. Returns the full synonym slice otherwise — the caller should index all returned strings alongside the canonical form.

pub fn has_synonyms(&self, word: &str) -> bool

Return true if word has synonym expansions.

pub fn len(&self) -> usize

Number of canonical entries in the map.

pub fn is_empty(&self) -> bool

Return true if the map has no entries.