Struct Snapshot 

pub struct Snapshot {
    pub durable: Arc<Vec<Item>>,
    pub tail: Arc<Vec<Item>>,
}

Re-exported alongside ProjectionHead: what a read of it yields, split into the durable projection and the ephemeral per-sample tail. Out-of-crate readers (fork’s history seed) name it to say which half they take. One read of the projection head, split by durability.

The split is the invariant: durable is byte-stable between supersede events (append-only projection), tail is regenerated every read. Every consumer that must not see ephemeral content — the fork seed, the cache breakpoint chooser — reads durable and structurally cannot reach tail.

Fields

durable: Arc<Vec<Item>>

The durable projection — byte-stable between supersede events.

tail: Arc<Vec<Item>>

Ephemeral per-sample suffix (todo reminder today), regenerated per read, never committed, rendered after every cache marker.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Snapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.