What’s new in Swift 5.5?
This is an Xcode playground that demonstrates the new features introduced in Swift 5.5:
- Async await
- Async sequences
- Effectful read-only properties
- Structured concurrency
async letbindings- Continuations for interfacing async tasks with synchronous code
- Actors
- Global actors
- Sendable and @Sendable closures
iffor postfix member expressions- Allow interchangeable use of
CGFloatandDoubletypes - Codable synthesis for enums with associated values
lazynow works in local contexts- Extend property wrappers to function and closure parameters
- Extending static member lookup in generic contexts
This is designed to complement my existing article What’s New in Swift 5.5. You might also want to read previous articles about the evolution of Swift 5:
- What’s New in Swift 5.4
- What’s New in Swift 5.3
- What’s New in Swift 5.2
- What’s New in Swift 5.1
- What’s New in Swift 5.0
Alternatively, I have a whole website dedicated to tracking what's new in Swift – you should check it out at https://www.whatsnewinswift.com.
If you hit problems or have questions, you're welcome to tweet me @twostraws or email [email protected].
