Runtime.NativeCombine

The native realization of an ordered combine and replication (Runtime.OrderedCombine, Compiler.Planning.OrderedCombine) for one role. The caller supplies the numerical tree, its anchor, the payload extent of one value, where in the arena the combine lives, the leaf value's address, the arithmetic that combines two values (`apply out left right`) and the descriptor of each peer's connection. This owner supplies everything that follows from the tree: the reduce and replicate global protocol and this role's projection, one frame per payload identity the role exchanges, the address of every logical reference the role holds, and the local and transfer commands. After the projected protocol runs, the role's leaf reference holds the replicated root value. Placement: `base` begins the frames (one stride per payload identity, in the projection's payload order), then the role's local value slots in combineLocalSlots order. A reference the role does not hold maps to the end of that region, outside every admitted resident, so admission refuses it. Sharing: the global protocol, its projection and the payload list are computed once per context and reused for every frame lookup, because rebuilding them per address repeats hashing and traversal.

49field unrestricted nativeCombineAnchorValue : (family RegionTransferIdentity)