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Merge pull request #227 from meilisearch/damerau-distance-cost-1

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Make the levenshtein algorithm consider transpositions to cost 1
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Clément Renault 2019-10-18 10:46:42 +02:00 committed by GitHub
commit 2d7db2a80f
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1 changed files with 3 additions and 3 deletions
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6
meilidb-core/src/automaton/dfa.rs
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@ -19,21 +19,21 @@ fn build_dfa_with_setting(query: &str, setting: PrefixSetting) -> DFA {
match query.len() { match query.len() {
0 ..= 4 => { 0 ..= 4 => {
let builder = LEVDIST0.get_or_init(|| LevBuilder::new(0, false)); let builder = LEVDIST0.get_or_init(|| LevBuilder::new(0, true));
match setting { match setting {
Prefix => builder.build_prefix_dfa(query), Prefix => builder.build_prefix_dfa(query),
NoPrefix => builder.build_dfa(query), NoPrefix => builder.build_dfa(query),
} }
}, },
5 ..= 8 => { 5 ..= 8 => {
let builder = LEVDIST1.get_or_init(|| LevBuilder::new(1, false)); let builder = LEVDIST1.get_or_init(|| LevBuilder::new(1, true));
match setting { match setting {
Prefix => builder.build_prefix_dfa(query), Prefix => builder.build_prefix_dfa(query),
NoPrefix => builder.build_dfa(query), NoPrefix => builder.build_dfa(query),
} }
}, },
_ => { _ => {
let builder = LEVDIST2.get_or_init(|| LevBuilder::new(2, false)); let builder = LEVDIST2.get_or_init(|| LevBuilder::new(2, true));
match setting { match setting {
Prefix => builder.build_prefix_dfa(query), Prefix => builder.build_prefix_dfa(query),
NoPrefix => builder.build_dfa(query), NoPrefix => builder.build_dfa(query),