How do I make a library swift 6 ready?

To make your library Swift 6 ready, you should follow these steps:

1. Update to the Latest Xcode: Ensure you are using the latest version of Xcode that supports Swift 6.

2. Enable Swift 6 Language Mode:

   • Go to your project settings.
   • Search for "Swift Language Mode".
   • Set it to Swift 6.

3. Address Data Race Safety: Swift 6 introduces compile-time data race safety. When you enable Swift 6 language mode, the compiler will diagnose concurrent access to memory across your project. Fix any data race issues that the compiler identifies. This can be done incrementally, module by module.

4. Use Compiler Diagnostics: The new Swift compiler diagnostics will guide you towards places in your code that need fixing. Think of it as a pair programmer pointing out potential bugs.

5. Adopt Concurrency Features: Consider using Swift's concurrency features like async/await, structured concurrency, and actors to help manage concurrent code safely.

6. Incremental Migration: You can migrate to Swift 6 incrementally. You don't need to wait for all dependencies to migrate. You can mix modules compiled with different Swift versions.

7. Review the Migration Guide: Refer to the migration guide available on swift.org for detailed insights and patterns on how to modify your code to eliminate data races.

For a practical example of enabling Swift 6 language mode and ensuring data race safety, you can refer to the session Migrate your app to Swift 6 (25:07).

Relevant Sessions

• Migrate your app to Swift 6
• What’s new in Swift
• Platforms State of the Union

These sessions provide comprehensive guidance on migrating to Swift 6 and leveraging its new features.