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Introduce the maximum_proximity helper function

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Kerollmops 2021-02-23 15:53:24 +01:00
parent 6008f528d0
commit 6d135beb21
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10
milli/src/search/query_tree.rs
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@ -524,6 +524,16 @@ pub fn maximum_typo(operation: &Operation) -> usize {
} }
} }
/// Returns the maximum proximity that this Operation allows.
pub fn maximum_proximity(operation: &Operation) -> usize {
use Operation::{Or, And, Query, Consecutive};
match operation {
Or(_, ops) => ops.iter().map(maximum_proximity).max().unwrap_or(0),
And(ops) => ops.len().saturating_sub(1) * 8,
Query(_) | Consecutive(_) => 0,
}
}
#[cfg(test)] #[cfg(test)]
mod test { mod test {
use fst::Set; use fst::Set;