Struct EventMask 

pub struct EventMask(/* private fields */);

One bit per Hooks event kind — the union gate every dispatch call site (hook_gate!) checks before doing ANY per-event work: payload construction, the ≤2KB cap copy, deadline registration, cancel-race scaffolding. A session whose Hooks impl doesn’t register a given event pays exactly one branch on a cached u8 for it instead (§S1 HookRouter diet).

This is the union half of the design doc’s { union: EventMask, per_event: [SmallVec<[HookId;2]>; 6] } table (design-docs §S1). hotl has exactly one Hooks object per session — there is no multi-hook registry to index a per-event dispatch table against — so only the union mask and its gates land here; the per-event table is deliberately left out. A future multi-hook registry would extend EventMask to that per-event table; until then, a registered event still runs every matching hook internally (lane 1 merges in registration order, lane 2 runs matching shell hooks concurrently) — the mask only decides whether the wrapper runs at all.

Implementations

impl EventMask

pub const PRE_TOOL: EventMask

pub const POST_TOOL: EventMask

pub const USER_PROMPT: EventMask

pub const NOTIFICATION: EventMask

pub const STOP: EventMask

pub const SESSION_END: EventMask

pub const NONE: EventMask

No events registered — a zero-hook session’s cached mask.

pub const ALL: EventMask

Every event registered — the trait default, so an impl that hasn’t opted into narrower dispatch (an external/unknown lane) stays correct.

pub const fn contains(self, bit: EventMask) -> bool

pub const fn union(self, other: EventMask) -> EventMask

pub const fn difference(self, other: EventMask) -> EventMask

Clear other’s bits from self — used to narrow the mask when a three-strike eviction silences the last live hook for an event.

pub const fn bits(self) -> u8

pub const fn from_bits(bits: u8) -> EventMask

Bits outside the six defined here are masked off — forward-compat against a stray byte rather than a panic.

Trait Implementations

impl Clone for EventMask

fn clone(&self) -> EventMask

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EventMask

impl Debug for EventMask

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

Formats the value using the given formatter.

impl Default for EventMask

fn default() -> EventMask

Returns the “default value” for a type.

impl Eq for EventMask

impl PartialEq for EventMask

fn eq(&self, other: &EventMask) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for EventMask