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我有一个递增处理Collection
的结构。将Int转换为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
轨道内部(例如计数的T.IndexDistance
小号处理的总数)。
但是,我还想将此距离与正常的UInt
s进行比较,并将其设置为正常的UInt
s。
问题是,我似乎没有找到方法将UInt
转换为T.IndexDistance
。