The compiler has no way of inferring the type of the generic ContentType
parameter because you're not using that parameter anywhere in the body
of the closure that could give the compiler a hint. So you have to
provide the type manually by explicitly annotating the type of the
closure's parameter.
For example, if you want to treat `items` as a series of `UInt8` values:
let tryThis = items.withUnsafeBytes {
(bytes: UnsafePointer<UInt8>) -> Int in
return 1
}
I agree the compiler diagnostic should probably be better, though.
Ole
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