Why can you not bind if expressions?

[anon9791410]

All of these generate the error

'if' may only be used as expression in return, throw, or as the source of an assignment".

switch if true { 1 } else { nil } {
default: return
}

guard let value = if true { 1 } else { nil } else { return }

if case .some(let value) = if true { 1 } else { nil } { }

(Enclosing parentheses do not help.)

---

true ? 1 : nil works fine in all cases.

[tera]

I'm afraid support of "full expressions" was left as a future direction.