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我有一個遞增處理Collection
的結構。將Int轉換爲Collection.IndexDistance
struct Foo<T: BidirectionalCollection>
where T.Iterator.Element == UInt8,
T.SubSequence: BidirectionalCollection,
T.SubSequence.Iterator.Element == T.Iterator.Element,
T.SubSequence.Index == T.Index,
T.SubSequence.IndexDistance == T.IndexDistance,
T.SubSequence.SubSequence == T.SubSequence
{
private var state: T.IndexDistance = 0
mutating func process(_ foo: T) {
// ...
}
}
我想保持在T.IndexDistance
軌道內部(例如計數的T.IndexDistance
小號處理的總數)。
但是,我還想將此距離與正常的UInt
s進行比較,並將其設置爲正常的UInt
s。
問題是,我似乎沒有找到方法將UInt
轉換爲T.IndexDistance
。