Potential bug with UIColor.hexRGB()

[markpokornycos]

The subject method has this line:

    assert(getRed(&r, green: &g, blue: &b, alpha: &a), "Unable to get RGB channels from UIColor")

If the build settings do not enable testing, the compiler (Xcode 12.1) appears to optimize the code by removing this line, and the result is every color gets the string "000000"

Recommend splitting this line into 2, one to call getRed() and another to assert on the result of the previous call. Here is an alternate computed var implementation that might replace the existing method:

    var hexString: String {
        var red: CGFloat = 0
        var green: CGFloat = 0
        var blue: CGFloat = 0
        var alpha: CGFloat = 0
        let success = getRed(&red, green: &green, blue: &blue, alpha: &alpha)
        assert(success, "Unable to get RGB channels from UIColor")
        return String(format: "%02X%02X%02X", Int(red * 255), Int(green * 255), Int(blue * 255))
    }