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struct AnyGenerator<Element>: GeneratorType { | |
init<G: GeneratorType where G.Element == Element>(_ gen: G) { | |
var gen = gen | |
self._next = { gen.next() } | |
} | |
private let _next: () -> Element? | |
func next() -> Element? { | |
return _next() | |
} | |
} | |
struct AnySequence<Element>: SequenceType { | |
init<S: SequenceType where S.Generator.Element == Element>(_ seq: S) { | |
self.underestimateCount = seq.underestimateCount | |
self._generate = { AnyGenerator(seq.generate()) } | |
} | |
private let _generate: () -> AnyGenerator<Element> | |
func generate() -> AnyGenerator<Element> { | |
return _generate() | |
} | |
let underestimateCount: () -> Int | |
} |
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