Struct HookSlot 

pub struct HookSlot<'t>(/* private fields */);

Where a released SavepointOp’s staged commit hooks fold into.

Returned as the second half of AtomicOperation::savepoint_parts, paired with the connection the savepoint runs on. It is deliberately opaque: the only things an implementor outside this crate can do with one are forward a slot obtained from an operation it wraps, or declare that it has no hook buffer via unsupported.

The pairing is the point. A savepoint needs a &mut to the connection and a &mut to the hook buffer, held simultaneously for its whole lifetime. Two separate &mut self accessors could never hand out both at once; returning them together lets the implementor split the borrow across its own disjoint fields, where the compiler permits it, and pass the result across the trait boundary already split.

Implementations

impl HookSlot<'_>

pub fn unsupported() -> Self

Declares that this operation has no commit-hook buffer.

Savepoints taken through it still work at the database level; they simply report supports_hooks as false and refuse add_commit_hook, so callers take their force_execute_pre_commit fallback — the same path they already take on the operation itself.