unwrapping multiple optionals in if statement

Question

I want to unwrap two optionals in one if statement, but the compiler complaints about an expected expression after operator at the password constant. What could be the reaso

Answer 1

Before Swift 1.2

Like @James, I've also created an unwrap function, but this one uses the existing if let for control flow, instead of using a closure:

func unwrap(optional1: T1?, optional2: T2?) -> (T1, T2)? {
  switch (optional1, optional2) {
  case let (.Some(value1), .Some(value2)):
    return (value1, value2)
  default:
    return nil
  }
}

This can be used like so:

if let (email, password) = unwrap(self.emailField?.text, self.passwordField?.text)
{
  // do something
}

From: https://gist.github.com/tomlokhorst/f9a826bf24d16cb5f6a3

Note that if you want to handle more cases (like when one of the two fields is nil), you're better off with a switch statement.