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func tupleToArray<T, U>(var tuple: T, _ resultType: U.Type) -> [U] {
let count = sizeof(T) / sizeof(U)
return withUnsafePointer(&tuple) { ptr -> [U] in
let eltPtr = UnsafePointer<U>(ptr)
return Array(0..<count).map({ eltPtr[$0] })
}
}
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