Sure > On Apr 18, 2016, at 4:25 PM, Jordan Rose <jordan_r...@apple.com> wrote: > > Good catch. Seems like an issue with the diagnostic. Can you file a bug at > bugs.swift.org <http://bugs.swift.org/>? > > Jordan > >> On Apr 18, 2016, at 13:45, David Sweeris via swift-dev <swift-dev@swift.org >> <mailto:swift-dev@swift.org>> wrote: >> >> I was updating some old code to Swift 2.2, and came across an unexpected >> tuple splat warning. This code is all you need to generate the deprecation >> warning: >> public class Value<T> { >> public typealias Element = T >> public typealias Ret = T >> } >> public class Expression<A, R> : Value<R> { >> public typealias Arg = A >> public var args: Arg! = nil >> public subscript(arg: Arg) -> Value<Ret> { return self } >> } >> public class Op<A, R> : Expression<A, R> { >> public typealias OpType = Arg -> Value<R> >> public let op: OpType >> init(op: OpType) { >> self.op = op >> super.init() >> } >> } >> public class BinaryOp<A1, A2, R> : Op<(A1, A2), R> { >> override init(op: OpType) { >> super.init(op: op) >> } >> override public subscript(x: Arg) -> Value<Ret> { >> return op(x) //Warning: Passing 2 arguments to a callee as a single >> tuple value is deprecated >> } >> } >> >> I don’t understand why the compiler thinks I’m trying to splat the tuple… >> `op` takes one argument of type `Arg` and I’m giving it one argument of type >> `Arg`. In the case of a `BinaryOp`, `Arg` does happen to be a tuple, but the >> proposal >> (https://github.com/apple/swift-evolution/blob/master/proposals/0029-remove-implicit-tuple-splat.md >> >> <https://github.com/apple/swift-evolution/blob/master/proposals/0029-remove-implicit-tuple-splat.md>) >> specifically says "it does not propose removing the ability to pass tuples >> as values to functions”. >> >> Am I missing something, or have I found a bug in Swift 2.2? >> >> - Dave Sweeris >> >> (PS, Sorry if this is the wrong list… I’m not sure where potential bug >> reports go.) >> _______________________________________________ >> swift-dev mailing list >> swift-dev@swift.org <mailto:swift-dev@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-dev >
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