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What’s new in Swift

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  • Ten years of swift!
  • Already added a platform steering group,
  • Adding an ecosystem workgroup, and embedded workgroup
  • Already available on apple, Linux, windows
    • Expanding to fedora and Debian
    • Also making progress on wasm
  • SourceKit LSP, for using vscode and others
  • Cross compilation from Mac to Linux
    • Fully static Linux sdk
    • --swift-sdk ...musl compile flag
  • Foundation
    • Foundation is now completely in swift, now for all platforms
    • Open source
  • Swift Testing
    • Open source, cross platform, modern swift, multiple IDEs
  • Explicitly built modules
    • More parallelism
    • Debugger can re-use artifacts. Should remove long waits for initial breakpoint.
    • Opt-in in build settings
  • New GitHub org, “swiftlang” instead of just under apple’s org
  • Swift 6 language mode
    • Noncopyable types
      • Ideal for structs with file descriptors as properties
      • Now can be used in generics and optionals
    • Embedded swift
      • New language subset and compilation subset
      • Disables language features that need runtime support
      • Still very close to full swift
      • Tiny (static) binary sizes
      • Used by the Secure Enclave
      • Incremental adoption via interoperability
    • C++ interop
      • More std types can be directly imported
      • Incrementally adopt swift in c++ apps
    • Typed throws
      • Good when propagating error types in generics, or constrained environments ie embedded, or perhaps when consumed in the same module
    • Data race safety
      • New synchronization primitives, Atomics, Mutex