Expand description
Slot addressing for cnodes.
A SlotIdx names one slot in a single cnode (root or nested).
A SlotPath walks from the root cnode through nested
Cap::CNode slots down to a target slot.
The root cnode is fixed-size 256 slots per v3 spec; nested
Cap::CNode values have variable size 2^k. SlotIdx is a u32
to accommodate the largest cnode reachable in practice.