[swift-evolution] Immediately-called closures should be considered @noescape

[Brent Royal-Gordon]

Here’s a little annoyance I ran across just now:

            let sub: CKSubscription = {
                if let ID = self.ID {
                    return CKSubscription(recordType: typeName, predicate: predicate, subscriptionID: ID, options: allMutations)
                }
                else {
                    return CKSubscription(recordType: typeName, predicate: predicate, options: allMutations)
                }
            }()

This closure obviously never leaves the enclosing function, but Swift doesn’t treat it as if it had been passed to a @noescape function, so I have to say “self.ID” instead of “ID” in the condition. That’s a bit irritating, and I’d like to see it improved.

-- 
Brent Royal-Gordon
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