在swift中打印可变内存地址

现在这是标准库的一部分：unsafeAddressOf.

/// Return an UnsafePointer to the storage used for `object`.  There's
/// not much you can do with this other than use it to identify the
/// object

斯威夫特3

对于Swift 3,使用withUnsafePointer：

var str = "A String"
withUnsafePointer(to: &str) {
    print(" str value \(str) has address: \($0)")
}