Trying to extend CoreLocation types to provide `Measurement` values. Of course all of these types just `typealias` `Double`, so they're all extending `Double`!

LocationExtensions.swift

extension CLLocationDegrees {
    public var degrees: Measurement<UnitAngle> {
        return Measurement(value: self, unit: .degrees)
    }

    public var radians: Measurement<UnitAngle> {
        return degrees.converted(to: .radians)
    }

    public var degreesMinutes: (Measurement<UnitAngle>, Measurement<UnitAngle>) {
        let deg = abs(self)
        let d = floor(deg)
        let m = (deg - d) * 60
        return (Measurement(value: d, unit: .degrees), Measurement(value: m, unit: .arcMinutes))
    }

    public var degreesMinutesSeconds: (Measurement<UnitAngle>, Measurement<UnitAngle>, Measurement<UnitAngle>) {
        let deg = abs(self)
        let d = floor(deg)
        let ms = (deg - d) * 60
        let m = floor(ms)
        let s = (ms - m) * 60
        return (Measurement(value: d, unit: .degrees), Measurement(value: m, unit: .arcMinutes), Measurement(value: s, unit: .arcSeconds))
    }
}

extension CLLocationSpeed {
    public var metersPerSecond: Measurement<UnitSpeed> {
        return Measurement(value: self, unit: .metersPerSecond)
    }
}

extension CLLocationDistance {
    public var meters: Measurement<UnitLength> {
        return Measurement(value: self, unit: .meters)
    }
}

extension CLLocationDirection {
    public var bearing: Measurement<UnitAngle> {
        return Measurement(value: self, unit: .degrees)
    }
}