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Move platform requirements to availability annotations
Adding or raising the deployment platforms in the package manifest is a SemVer major breaking change as consumers must also add or raise their deployment platforms. This is a known limitation of SwiftPM. Unforunately this means that it's very difficult for non-leaf packages to adopt packages which declare their platforms in the manifest. Doing so puts the brakes on adoption and ecosystem growth. For 'core' packages like this one availability constraints should be expressed on declarations rather than in the manifest. This patch adds equivalent availability annotations to declarations across the package and removes platforms from the package manifest.
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‎Package.swift

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@@ -4,12 +4,6 @@ import PackageDescription
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let package = Package(
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name: "swift-async-algorithms",
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platforms: [
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.macOS("10.15"),
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.iOS("13.0"),
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.tvOS("13.0"),
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.watchOS("6.0")
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],
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products: [
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.library(name: "AsyncAlgorithms", targets: ["AsyncAlgorithms"]),
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],

‎[email protected]

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@@ -4,12 +4,6 @@ import PackageDescription
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let package = Package(
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name: "swift-async-algorithms",
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platforms: [
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.macOS("10.15"),
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.iOS("13.0"),
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.tvOS("13.0"),
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.watchOS("6.0")
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],
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products: [
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.library(name: "AsyncAlgorithms", targets: ["AsyncAlgorithms"]),
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.library(name: "AsyncSequenceValidation", targets: ["AsyncSequenceValidation"]),

‎Sources/AsyncAlgorithms/AsyncAdjacentPairsSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// An `AsyncSequence` that iterates over the adjacent pairs of the original
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/// original `AsyncSequence`.
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/// An `AsyncSequence` that iterates over the adjacent pairs of the original
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/// `AsyncSequence`.
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@frozen
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncAdjacentPairsSequence<Base: AsyncSequence>: AsyncSequence {
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public typealias Element = (Base.Element, Base.Element)
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@@ -83,6 +85,7 @@ public struct AsyncAdjacentPairsSequence<Base: AsyncSequence>: AsyncSequence {
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncAdjacentPairsSequence: Sendable where Base: Sendable, Base.Element: Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncBufferedByteIterator.swift

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/// }
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///
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///
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncBufferedByteIterator: AsyncIteratorProtocol {
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public typealias Element = UInt8
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@usableFromInline var buffer: _AsyncBytesBuffer
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extension AsyncBufferedByteIterator: Sendable { }
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@frozen @usableFromInline
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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internal struct _AsyncBytesBuffer {
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@usableFromInline
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final class Storage {

‎Sources/AsyncAlgorithms/AsyncChain2Sequence.swift

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/// - Returns: An asynchronous sequence that iterates first over the elements of `s1`, and
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/// then over the elements of `s2`.
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@inlinable
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public func chain<Base1: AsyncSequence, Base2: AsyncSequence>(_ s1: Base1, _ s2: Base2) -> AsyncChain2Sequence<Base1, Base2> where Base1.Element == Base2.Element {
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AsyncChain2Sequence(s1, s2)
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}
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/// A concatenation of two asynchronous sequences with the same element type.
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@frozen
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncChain2Sequence<Base1: AsyncSequence, Base2: AsyncSequence> where Base1.Element == Base2.Element {
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@usableFromInline
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let base1: Base1
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChain2Sequence: AsyncSequence {
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public typealias Element = Base1.Element
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChain2Sequence: Sendable where Base1: Sendable, Base2: Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncChain3Sequence.swift

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/// - Returns: An asynchronous sequence that iterates first over the elements of `s1`, and
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/// then over the elements of `s2`, and then over the elements of `s3`
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@inlinable
22+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public func chain<Base1: AsyncSequence, Base2: AsyncSequence, Base3: AsyncSequence>(_ s1: Base1, _ s2: Base2, _ s3: Base3) -> AsyncChain3Sequence<Base1, Base2, Base3> {
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AsyncChain3Sequence(s1, s2, s3)
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}
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/// A concatenation of three asynchronous sequences with the same element type.
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@frozen
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncChain3Sequence<Base1: AsyncSequence, Base2: AsyncSequence, Base3: AsyncSequence> where Base1.Element == Base2.Element, Base1.Element == Base3.Element {
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@usableFromInline
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let base1: Base1
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChain3Sequence: AsyncSequence {
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public typealias Element = Base1.Element
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChain3Sequence: Sendable where Base1: Sendable, Base2: Sendable, Base3: Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncChunkedByGroupSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Creates an asynchronous sequence that creates chunks of a given `RangeReplaceableCollection`
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/// type by testing if elements belong in the same group.
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/// // [10, 20, 30]
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/// // [10, 40, 40]
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/// // [10, 20]
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncChunkedByGroupSequence<Base: AsyncSequence, Collected: RangeReplaceableCollection>: AsyncSequence where Collected.Element == Base.Element {
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public typealias Element = Collected
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChunkedByGroupSequence : Sendable where Base : Sendable, Base.Element : Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncChunkedOnProjectionSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Creates an asynchronous sequence that creates chunks of a given `RangeReplaceableCollection` type on the uniqueness of a given subject.
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@inlinable
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}
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/// An `AsyncSequence` that chunks on a subject when it differs from the last element.
28+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncChunkedOnProjectionSequence<Base: AsyncSequence, Subject: Equatable, Collected: RangeReplaceableCollection>: AsyncSequence where Collected.Element == Base.Element {
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public typealias Element = (Subject, Collected)
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChunkedOnProjectionSequence : Sendable where Base : Sendable, Base.Element : Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncChunksOfCountOrSignalSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Creates an asynchronous sequence that creates chunks of a given `RangeReplaceableCollection` type of a given count or when a signal `AsyncSequence` produces an element.
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public func chunks<Signal, Collected: RangeReplaceableCollection>(ofCount count: Int, or signal: Signal, into: Collected.Type) -> AsyncChunksOfCountOrSignalSequence<Self, Collected, Signal> where Collected.Element == Element {
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}
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/// An `AsyncSequence` that chunks elements into collected `RangeReplaceableCollection` instances by either count or a signal from another `AsyncSequence`.
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncChunksOfCountOrSignalSequence<Base: AsyncSequence, Collected: RangeReplaceableCollection, Signal: AsyncSequence>: AsyncSequence, Sendable where Collected.Element == Base.Element, Base: Sendable, Signal: Sendable, Base.Element: Sendable, Signal.Element: Sendable {
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public typealias Element = Collected

‎Sources/AsyncAlgorithms/AsyncChunksOfCountSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Creates an asynchronous sequence that creates chunks of a given `RangeReplaceableCollection` of a given count.
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@inlinable
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}
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/// An `AsyncSequence` that chunks elements into `RangeReplaceableCollection` instances of at least a given count.
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncChunksOfCountSequence<Base: AsyncSequence, Collected: RangeReplaceableCollection>: AsyncSequence where Collected.Element == Base.Element {
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public typealias Element = Collected
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChunksOfCountSequence : Sendable where Base : Sendable, Base.Element : Sendable { }
92+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncChunksOfCountSequence.Iterator : Sendable where Base.AsyncIterator : Sendable, Base.Element : Sendable { }
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91-
@available(*, unavailable)
92-
extension AsyncChunksOfCountSequence.Iterator: Sendable { }
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// The following conflicts with the above conformance. The compiler is okay with this
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// when 'platforms' are specified in the package manifest but not when the @available
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// attribute is used instead.
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//
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// @available(*, unavailable)
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// extension AsyncChunksOfCountSequence.Iterator: Sendable { }

‎Sources/AsyncAlgorithms/AsyncCompactedSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Returns a new `AsyncSequence` that iterates over every non-nil element from the
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/// original `AsyncSequence`.
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/// An `AsyncSequence` that iterates over every non-nil element from the original
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/// `AsyncSequence`.
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@frozen
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncCompactedSequence<Base: AsyncSequence, Element>: AsyncSequence
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where Base.Element == Element? {
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncCompactedSequence: Sendable where Base: Sendable, Base.Element: Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncExclusiveReductionsSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Returns an asynchronous sequence containing the accumulated results of combining the
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/// elements of the asynchronous sequence using the given closure.
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/// An asynchronous sequence of applying a transform to the element of an asynchronous sequence and the
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/// previously transformed result.
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@frozen
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncExclusiveReductionsSequence<Base: AsyncSequence, Element> {
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@usableFromInline
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let base: Base
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}
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}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
7275
extension AsyncExclusiveReductionsSequence: AsyncSequence {
7376
/// The iterator for an `AsyncExclusiveReductionsSequence` instance.
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@frozen
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}
112115
}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
114118
extension AsyncExclusiveReductionsSequence: Sendable where Base: Sendable, Element: Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncInclusiveReductionsSequence.swift

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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence {
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/// Returns an asynchronous sequence containing the accumulated results of combining the
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/// elements of the asynchronous sequence using the given closure.
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/// An asynchronous sequence containing the accumulated results of combining the
2930
/// elements of the asynchronous sequence using a given closure.
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@frozen
32+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
3133
public struct AsyncInclusiveReductionsSequence<Base: AsyncSequence> {
3234
@usableFromInline
3335
let base: Base
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}
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}
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47+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
4548
extension AsyncInclusiveReductionsSequence: AsyncSequence {
4649
public typealias Element = Base.Element
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8487
}
8588
}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
8791
extension AsyncInclusiveReductionsSequence: Sendable where Base: Sendable { }
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@available(*, unavailable)

‎Sources/AsyncAlgorithms/AsyncJoinedBySeparatorSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence where Element: AsyncSequence {
1314
/// Concatenate an `AsyncSequence` of `AsyncSequence` elements with a separator.
1415
@inlinable
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1819
}
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2021
/// An `AsyncSequence` that concatenates `AsyncSequence` elements with a separator.
22+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2123
public struct AsyncJoinedBySeparatorSequence<Base: AsyncSequence, Separator: AsyncSequence>: AsyncSequence where Base.Element: AsyncSequence, Separator.Element == Base.Element.Element {
2224
public typealias Element = Base.Element.Element
2325
public typealias AsyncIterator = Iterator
@@ -140,6 +142,7 @@ public struct AsyncJoinedBySeparatorSequence<Base: AsyncSequence, Separator: Asy
140142
}
141143
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145+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
143146
extension AsyncJoinedBySeparatorSequence: Sendable
144147
where Base: Sendable, Base.Element: Sendable, Base.Element.Element: Sendable, Separator: Sendable { }
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‎Sources/AsyncAlgorithms/AsyncJoinedSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
1213
extension AsyncSequence where Element: AsyncSequence {
1314
/// Concatenate an `AsyncSequence` of `AsyncSequence` elements
1415
@inlinable
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2021
/// An `AsyncSequence` that concatenates`AsyncSequence` elements
2122
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23+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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public struct AsyncJoinedSequence<Base: AsyncSequence>: AsyncSequence where Base.Element: AsyncSequence {
2325
public typealias Element = Base.Element.Element
2426
public typealias AsyncIterator = Iterator
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9092
}
9193
}
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95+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
9396
extension AsyncJoinedSequence: Sendable
9497
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‎Sources/AsyncAlgorithms/AsyncRemoveDuplicatesSequence.swift

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//
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//===----------------------------------------------------------------------===//
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
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extension AsyncSequence where Element: Equatable {
1314
/// Creates an asynchronous sequence that omits repeated elements.
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public func removeDuplicates() -> AsyncRemoveDuplicatesSequence<Self> {
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1819
}
1920
}
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22+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2123
extension AsyncSequence {
2224
/// Creates an asynchronous sequence that omits repeated elements by testing them with a predicate.
2325
public func removeDuplicates(by predicate: @escaping @Sendable (Element, Element) async -> Bool) -> AsyncRemoveDuplicatesSequence<Self> {
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3133
}
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3335
/// An asynchronous sequence that omits repeated elements by testing them with a predicate.
36+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
3437
public struct AsyncRemoveDuplicatesSequence<Base: AsyncSequence>: AsyncSequence {
3538
public typealias Element = Base.Element
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8689
}
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/// An asynchronous sequence that omits repeated elements by testing them with an error-throwing predicate.
92+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
8993
public struct AsyncThrowingRemoveDuplicatesSequence<Base: AsyncSequence>: AsyncSequence {
9094
public typealias Element = Base.Element
9195

@@ -141,7 +145,9 @@ public struct AsyncThrowingRemoveDuplicatesSequence<Base: AsyncSequence>: AsyncS
141145
}
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@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
144149
extension AsyncRemoveDuplicatesSequence: Sendable where Base: Sendable, Base.Element: Sendable { }
150+
@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
145151
extension AsyncThrowingRemoveDuplicatesSequence: Sendable where Base: Sendable, Base.Element: Sendable { }
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147153
@available(*, unavailable)

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