Swift 5.7
The Swift 5.7 language and standard library feature a number of improvements:
- New shorthand syntax for common boilerplate code, including
if letstatements and multi-statement closure type annotations- Lifted long-standing language limitations to make generic programming more seamless
- Enhanced data race safety with new annotations and opt-in diagnostics
- Actor isolation in distributed environments
- Improved usability of a suite of existing pointer APIs
- Brand new language support and APIs for string processing
Most of these features were discussed at WWDC22 and were covered in a previous blog post, Swift language announcements from WWDC22. You can also find a complete list of language and standard library Swift Evolution proposals in the Swift Evolution Appendix.
In this article, we’ll explain the concept of type erasure, how it used to be done, what’s different in Swift 5.7, and how these changes work under the hood.
Previously:
