Publishers.Zip4

struct · iOS 13.0+ · SDK 27.1

struct Zip4<A, B, C, D> where A : Publisher, B : Publisher, C : Publisher, D : Publisher, A.Failure == B.Failure, B.Failure == C.Failure, C.Failure == D.Failure

A publisher created by applying the zip function to four upstream publishers. Use a `Publishers.Zip4` to combine the latest elements from four publishers and emit a tuple to the downstream. The returned publisher waits until all four publishers have emitted an event, then delivers the oldest unconsumed event from each publisher as a tuple to the subscriber. If any upstream publisher finishes successfully or fails with an error, so too does the zipped publisher.

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This type has no directly callable members in this snapshot. See the framework’s skipped declarations for unsupported APIs.

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