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# Publishers.Merge8

A publisher created by applying the merge function to eight upstream publishers.

```
struct Merge8<A, B, C, D, E, F, G, H> where A : Publisher, B : Publisher, C : Publisher, D : Publisher, E : Publisher, F : Publisher, G : Publisher, H : Publisher, A.Failure == B.Failure, A.Output == B.Output, B.Failure == C.Failure, B.Output == C.Output, C.Failure == D.Failure, C.Output == D.Output, D.Failure == E.Failure, D.Output == E.Output, E.Failure == F.Failure, E.Output == F.Output, F.Failure == G.Failure, F.Output == G.Output, G.Failure == H.Failure, G.Output == H.Output
```

## Topics

### Creating a merge-eight publisher

[`init(_:_:_:_:_:_:_:_:)`](/documentation/Combine/Publishers/Merge8/init(_:_:_:_:_:_:_:_:))

Creates a publisher created by applying the merge function to eight upstream publishers.

### Declaring supporting types

[`Publishers.Merge8.Output`](/documentation/Combine/Publishers/Merge8/Output)

The kind of values published by this publisher.

[`Publishers.Merge8.Failure`](/documentation/Combine/Publishers/Merge8/Failure)

The kind of errors this publisher might publish.

### Inspecting publisher properties

[`a`](/documentation/Combine/Publishers/Merge8/a)

A publisher to merge.

[`b`](/documentation/Combine/Publishers/Merge8/b)

A second publisher to merge.

[`c`](/documentation/Combine/Publishers/Merge8/c)

A third publisher to merge.

[`d`](/documentation/Combine/Publishers/Merge8/d)

A fourth publisher to merge.

[`e`](/documentation/Combine/Publishers/Merge8/e)

A fifth publisher to merge.

[`f`](/documentation/Combine/Publishers/Merge8/f)

A sixth publisher to merge.

[`g`](/documentation/Combine/Publishers/Merge8/g)

An seventh publisher to merge.

[`h`](/documentation/Combine/Publishers/Merge8/h)

A eighth publisher to merge.

### Comparing publishers

[`==(_:_:)`](/documentation/Combine/Publishers/Merge8/==(_:_:))

Returns a Boolean value that indicates whether two publishers are equivalent.


---

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