Remove Sendable constraint for AsyncAdjacentPairsSequence

FranzBusch · FranzBusch · commit 51001e9df8f9 · 2022-10-12T10:23:19.000+01:00
# Motivation
We want to remove any `Sendable` constraints on iterators since they ought to not be passed between `Task`s.

# Modification
Explicitly mark the `AsyncAdjacentPairsSequence` to be not `Sendable`.

# Result
Nobody can make this `Sendable`.
diff --git a/Sources/AsyncAlgorithms/AsyncAdjacentPairsSequence.swift b/Sources/AsyncAlgorithms/AsyncAdjacentPairsSequence.swift
@@ -83,5 +83,7 @@ extension AsyncSequence {
   }
 }
 
-extension AsyncAdjacentPairsSequence: Sendable where Base: Sendable, Base.Element: Sendable, Base.AsyncIterator: Sendable { }
-extension AsyncAdjacentPairsSequence.Iterator: Sendable where Base: Sendable, Base.Element: Sendable, Base.AsyncIterator: Sendable { }
+extension AsyncAdjacentPairsSequence: Sendable where Base: Sendable, Base.Element: Sendable { }
+
+@available(*, unavailable)
+extension AsyncAdjacentPairsSequence.Iterator: Sendable { }

Original file line number	Diff line number	Diff line change
`@@ -83,5 +83,7 @@ extension AsyncSequence {`
`83`	`83`	`}`
`84`	`84`	`}`
`85`	`85`
`86`		`-extension AsyncAdjacentPairsSequence: Sendable where Base: Sendable, Base.Element: Sendable, Base.AsyncIterator: Sendable { }`
`87`		`-extension AsyncAdjacentPairsSequence.Iterator: Sendable where Base: Sendable, Base.Element: Sendable, Base.AsyncIterator: Sendable { }`
	`86`	`+extension AsyncAdjacentPairsSequence: Sendable where Base: Sendable, Base.Element: Sendable { }`
	`87`	`+`
	`88`	`+@available(*, unavailable)`
	`89`	`+extension AsyncAdjacentPairsSequence.Iterator: Sendable { }`