luci/core/
segment_id.rs

1/// Globally unique segment identifier.
2///
3/// Assigned by the `IndexWriter` on segment creation. `u64` provides
4/// global uniqueness across the index's lifetime. See [[architecture-storage-format#Root Metadata]]
5/// for how segment IDs map to block extents.
6#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
7pub struct SegmentId(pub u64);
8
9impl SegmentId {
10    pub const fn new(id: u64) -> Self {
11        Self(id)
12    }
13
14    pub const fn as_u64(self) -> u64 {
15        self.0
16    }
17}
18
19impl std::fmt::Display for SegmentId {
20    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
21        write!(f, "{}", self.0)
22    }
23}
24
25#[cfg(test)]
26mod tests {
27    use super::*;
28
29    #[test]
30    fn ordering() {
31        assert!(SegmentId(0) < SegmentId(1));
32    }
33
34    #[test]
35    fn as_u64_round_trips() {
36        assert_eq!(SegmentId::new(999).as_u64(), 999);
37    }
38}
luci/core/segment_id.rs

luci/core/
segment_id.rs
