Re: <https://gist.github.com/xwu/d68baefaae9e9291d2e65bd12ad51be2#integers-from-a-floating-point-source>
There are also some commented-out requirements, which were accepted for SE-0067. (One requirement is obsoleted by the Numeric protocol). Can these be implemented yet, based on your experience? FloatingPoint ------------- <https://github.com/apple/swift/blob/5ec0563c167a720e8c2c99390df6e032a24f2403/stdlib/public/core/FloatingPoint.swift.gyb#L256-L273> > /* TODO: Implement the following APIs once a revised integer protocol is > introduced that allows for them to be implemented. In particular, we > need to have an "index of most significant bit" operation and "get > absolute value as unsigned type" operation on the Integer protocol. > > /// Creates the closest representable value to the given integer. > /// > /// - Parameter value: The integer to represent as a floating-point value. > init<Source: Integer>(_ value: Source) > > /// Creates a value that exactly represents the given integer. > /// > /// If the given integer is outside the representable range of the type, the > /// result is `nil`. > /// > /// - Parameter value: The integer to represent as a floating-point value. > init?<Source: Integer>(exactly value: Source) > */ BinaryFloatingPoint ------------------- <https://github.com/apple/swift/blob/5ec0563c167a720e8c2c99390df6e032a24f2403/stdlib/public/core/FloatingPoint.swift.gyb#L1476-L1491> > /* TODO: Implement these once it becomes possible to do so (requires > revised > Integer protocol). > /// Creates a new instance from the given value, rounded to the closest > /// possible representation. > /// > /// - Parameter value: A floating-point value. > init<Source: BinaryFloatingPoint>(_ value: Source) > > /// Creates a new instance equivalent to the exact given value. > /// > /// If the value you pass as `value` can't be represented exactly, the > result > /// of this initializer is `nil`. > /// > /// - Parameter value: A floating-point value to represent. > init?<Source: BinaryFloatingPoint>(exactly value: Source) > */ _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution