Module combine 

Multi-dep combinator operators (Slice C-2, D020).

Mirrors the TS shapes in ~/src/graphrefly-ts/packages/pure-ts/src/extra/operators/combine.ts, but driven by Core dispatch (graphrefly_core::OperatorOp) instead of derived-fn factories.

• combine — N-dep combineLatest (any dep fire → emit packed tuple)
• with_latest_from — 2-dep, fire-on-primary-only (Phase 10.5)
• merge — N-dep, forward all DATA handles verbatim (zero FFI)

Structs

MergeRegistration

Registration output for merge — no closure involved (zero FFI).

Functions

combine

combine(...sources) — combineLatest semantics.

merge

merge(...sources) — forward all DATA handles verbatim (zero FFI).

merge_as_op

Convenience: merge with an explicit FnId return for API consistency. Since merge is zero-FFI, the FnId is a sentinel. Prefer merge unless you need the OperatorRegistration shape.

with_latest_from

with_latest_from(primary, secondary) — fire-on-primary-only.

Type Aliases

PackerFn

Boxed packer closure type — converts N HandleIds to a single tuple HandleId.