Nil-fallback operator suggestions

gistfile1.txt

// Looking for a Swift replacement for the following ObjC code:
//   id x = foo ?: bar
//
// Which of the following do you like, if any? Any other suggestions?
// (Note that '?' cannot be used in a custom operator.)


x = foo !|| bar
x = foo |< bar
x = foo ||< bar
x = foo <|| bar
x = foo <| bar
x = foo <= bar
x = foo <- bar
x = foo ||| bar

Unfortunately, it does not look like you can use a ? in an overloaded operator.

[sigh] True. Updated.

x = foo ||: bar

You can't use : in an operator either. Otherwise I'd say !:.

I really think there should be an ! in the operator. It helps to hint that there is (or at least could be) an optional unwrapping occurring. Maybe something like !=.

I'm not sure the operator should be doing an unwrap; it should leave the type of the lhs exactly as it was. After all, since the RHS may be an optional as well, there is no guarantee that the return value of this operator is a non-Optional type.