Struct DenseEntityIndex 

pub struct DenseEntityIndex { /* private fields */ }

Immutable direct-address index for sources whose offsets fit u32. Construction refuses sparse ids when its arrays would exceed the three compact input columns. Presence is separate from the span, so id zero and an empty span at offset zero remain valid entries.

Implementations

impl DenseEntityIndex

pub fn try_from_columns( ids: &[u32], starts: &[u32], lengths: &[u32], ) -> Option<Self>

Build from strictly ascending, unique ids and parallel span columns. Returns None for mismatched/unsorted columns, empty input, or a sparse id range. The allocation bound is checked before allocating any array; a lone u32::MAX id cannot request a multi-gigabyte allocation.

pub fn lookup(&self, id: u32) -> Option<(usize, usize)>

Return the authored (start, end) span, or None for an absent id.