That's putting it a bit mildly. Speaking as the author of that RFC, Rust's "if let" would never have existed if it were not for Swift. When I saw Swift's "if le

That's putting it a bit mildly. Speaking as the author of that RFC, Rust's "if let" would never have existed if it were not for Swift. When I saw Swift's "if let" I immediately knew I wanted it in Rust. I also generalized it to arbitrary patterns at that time, since Rust doesn't fetishize Option the way Swift fetishizes Optional. I am glad to see Swift 1.2 expanding "if let" to multiple clauses. But I do wish it supported arbitrary values instead of just Optional.