[Accepted] SE-0277: Float16

Evolution Announcements
2

I tried to use Float16 today in Xcode 12.5 (Swift 5.4) on macOS 11.3, and…it doesn't work. According to Apple's docs it's in the Swift Standard Library. But if I write:

let f: Float16 = 1

I get 'Float16' is unavailable in macOS. If I grep through Xcode.app/, I find x86_64-apple-macos.swiftinterface:

@available(macOS 11, iOS 14, tvOS 14, watchOS 7, *)
@available(macOS, unavailable)
@available(macCatalyst, unavailable)
@frozen public struct Float16 {
  @_transparent public init() {
    fatalError("Float16 is not available")
  }
}

My macOS app targets only macOS 11.

I'm not at all sure how I can use it.

1 Like