Hi All
I am looking at Swift 2.0. The compiler has converted the code below to the
“latest” Swift syntax. This causes the error shown. I have spent a few days
trying to get this to compile. What is confusing to me, is that the code,
listed last (func removeAnElemen…..) does compile ( all in Playground) and
there 'anyGenerator' seems to tolerate some logic in the body of
“anyGenerator”.
Any insight will be much appreciated.
// This is OLD Swift
// Generators and sequences
var currentValue = 1
let newGenerator = GeneratorOf<Int> {
let previousValue = currentValue
currentValue = currentValue * 2
if (previousValue > 20) { return nil }
return previousValue
}
let generatedArray = Array(newGenerator)
// This is Swift 2.0
// Generators and sequences
var currentValue = 1
let newGenerator = anyGenerator { // Error: Cannot find an overload for
‘anyGenerator’ that accepts an argument list of type ‘(()-> _)
let previousValue = currentValue
currentValue = currentValue * 2
if (previousValue > 20) { return nil }
return previousValue
}
let generatedArray = Array(newGenerator)
This does compile:
func removeAnElement<T>(array: [T]) -> AnyGenerator<[T]> {
var i = 0
return anyGenerator {
if i < array.count {
var result = array.self
result.removeAtIndex(i)
i++
return result
}
return nil
}
}
Array(removeAnElement([1,2,3]))
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