Module object_slab 

RC-backed object slab for class instances (replaces mark-sweep GC). Object Slab — deterministic RC-backed replacement for mark-sweep GC.

Provides indexed allocation of type-erased objects. Objects are ref-counted (via Rc<RefCell<Box<dyn Any>>>) so they are freed deterministically when no references remain. Freed slots are reused in LIFO order for deterministic placement.

Determinism guarantees

• Same allocation sequence produces same slot indices.
• Slot reuse is LIFO (last freed = first reused).
• No stop-the-world pauses.
• No OS memory return during normal execution (slots are recycled).

Structs

ObjectSlab

A deterministic slab allocator for type-erased objects.

SlabRef

A handle into the object slab. Lightweight, copyable index.