Struct NoHook 

pub struct NoHook;

Default no-op hook. All branches are eliminated at compile time.

Trait Implementations

impl<K: Key, T> TypedWriteHook<K, T> for NoHook

Available on crate feature typed-tree only.

const NEEDS_OLD_VALUE: bool = false

Unused for TypedTree/TypedMap/ZeroTree/ZeroMap — old value is always provided (it lives in memory). Kept for trait uniformity with WriteHook.

const NEEDS_INIT: bool = false

fn on_write(&self, _key: &K, _old: Option<&T>, _new: Option<&T>)

fn on_init(&self, _key: &K, _value: &T)

impl<K: Key> WriteHook<K> for NoHook

const NEEDS_OLD_VALUE: bool = false

Only affects VarTree / VarMap: when false, skips disk I/O for the old value — old is None in on_write. Const/Typed/Zero collections always provide the old value (it’s in memory, zero cost).

const NEEDS_INIT: bool = false

When true, Self::on_init is called for every live entry during collection open (after recovery and migration). When false (default), the init iteration is compiled out entirely.

fn on_write(&self, _key: &K, _old: Option<&[u8]>, _new: Option<&[u8]>)

Called after a successful write operation.

fn on_init(&self, _key: &K, _value: &[u8])

Called once per live entry during collection open. Fires after recovery and migration are complete, with the final value.