how to move from combine to async await

To move from Combine to async/await in Swift, you can follow these general steps:

1. Identify Combine Publishers: Locate the parts of your code where Combine publishers are used.

2. Replace Publishers with Async Functions: Convert these publishers into async functions. An async function in Swift is marked with the async keyword, and you use the await keyword to call these functions.

3. Handle Asynchronous Operations: For operations like reading from disk or messaging another service, you can use the await keyword to wait for these operations to complete. This allows the CPU to handle other tasks while waiting.

4. Use Continuations for Callbacks: If you have completion handlers, you can use withCheckedContinuation or withCheckedThrowingContinuation to convert them into async/await.

Here are some relevant segments from WWDC sessions that discuss async/await and concurrency in Swift:

• A Swift Tour: Explore Swift’s features and design: This session covers the basics of writing concurrent code in Swift, including tasks, async/await, and actors. You can start learning about concurrency in Swift from the Concurrency chapter.

• Explore Swift performance: This session explains how async functions are implemented and how they manage memory. You can learn about async functions starting from the Async functions chapter.

• Migrate your app to Swift 6: This session provides practical examples of adopting Swift's concurrency features and handling shared mutable state. You can start from the Adopting concurrency features chapter.

• Go further with Swift Testing: This session shows techniques for waiting on asynchronous conditions with Swift testing, which can be useful when converting tests from Combine to async/await. You can start from the Asynchronous conditions chapter.

By following these steps and referring to the mentioned sessions, you can effectively transition your code from Combine to async/await in Swift.