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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2021-2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
//
//===----------------------------------------------------------------------===//
struct ManyConsumer<Base: CollectionConsumer> {
let base: Base
}
extension ManyConsumer: CollectionConsumer {
typealias Consumed = Base.Consumed
func consuming(
_ consumed: Base.Consumed,
in range: Range<Consumed.Index>
) -> Base.Consumed.Index? {
var result = range.lowerBound
while let index = base.consuming(consumed, in: result..<range.upperBound),
index != result {
result = index
}
return result
}
}
extension ManyConsumer: BidirectionalCollectionConsumer
where Base: BidirectionalCollectionConsumer
{
func consumingBack(
_ consumed: Base.Consumed,
in range: Range<Consumed.Index>
) -> Base.Consumed.Index? {
var result = range.upperBound
while let index = base.consumingBack(
consumed,
in: range.lowerBound..<result), index != result {
result = index
}
return result
}
}
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