Multiple if let bindings

You may now place multiple if let bindings on a single line separated by a comma, rather than embed them in increasingly indented pyramids.

For example, previously you would write code like this:

if let user = loadUsername() {
    if let password = decryptPassword() {
        authenticate(user, password)
    }
}

As of Swift 1.2 you can write this:

if let user = loadUsername(), let password = decryptPassword() {
    authenticate(user, password)
}