Back to the Future - Swift 6 Edition!
summary
Swift 6 arrives as an opt‑in language mode so updating the compiler alone does not force breaks, but 12 Swift‑Evolution proposals introduce real source breaks when you enable the new mode. Use Swift 6 snapshots or Xcode toolchains and enable language mode per package with Swift tools version or -swift-version; Xcode projects lack a simple toggle. Expect hundreds of strict concurrency warnings now (one demo shows ~452 → ~400 potential errors), test upcoming feature flags per module, and watch strict concurrency checking, internal imports by default, and Swift 6 language mode opt-in for the biggest migration work.
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chapters (14)
- 0:00Introduction
- 4:17What is Swift 6
- 8:43Swift 6 Language Mode
- 12:37How to download Swift 6
- 17:52How to enable Swift 6 in Xcode
- 21:37How to test Swift 6 in Xcode
- 25:15Swift 6 Break Changes
- 35:33Swift Magic Files
- 38:40Regliterals
- 40:57H Trail Enclosures
- 43:13Implicit Open Existence
- 46:41H Error
- 48:23H Access Control
- 53:55H Export
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