---
title: "init(upstream:receiveSubscription:receiveOutput:receiveCompletion:receiveCancel:receiveRequest:)"
framework: combine
role: symbol
role_heading: Initializer
path: "combine/publishers/handleevents/init(upstream:receivesubscription:receiveoutput:receivecompletion:receivecancel:receiverequest:)"
---

# init(upstream:receiveSubscription:receiveOutput:receiveCompletion:receiveCancel:receiveRequest:)

Creates a publisher that performs the specified closures when publisher events occur.

## Declaration

```swift
init(upstream: Upstream, receiveSubscription: ((any Subscription) -> Void)? = nil, receiveOutput: ((Publishers.HandleEvents<Upstream>.Output) -> Void)? = nil, receiveCompletion: ((Subscribers.Completion<Publishers.HandleEvents<Upstream>.Failure>) -> Void)? = nil, receiveCancel: (() -> Void)? = nil, receiveRequest: ((Subscribers.Demand) -> Void)?)
```

## Parameters

- `upstream`: The publisher from which this publisher receives elements.
- `receiveSubscription`: A closure that executes when the publisher receives the subscription from the upstream publisher.
- `receiveOutput`: A closure that executes when the publisher receives a value from the upstream publisher.
- `receiveCompletion`: A closure that executes when the publisher receives the completion from the upstream publisher.
- `receiveCancel`: A closure that executes when the downstream receiver cancels publishing.
- `receiveRequest`: A closure that executes when the publisher receives a request for more elements.