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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Async Algorithms open source project
//
// Copyright (c) 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
//
//===----------------------------------------------------------------------===//
final class ReportingSequence<Element>: Sequence, IteratorProtocol {
enum Event: Equatable, CustomStringConvertible {
case next
case makeIterator
var description: String {
switch self {
case .next: return "next()"
case .makeIterator: return "makeIterator()"
}
}
}
var events = [Event]()
var elements: [Element]
init(_ elements: [Element]) {
self.elements = elements
}
func next() -> Element? {
events.append(.next)
guard elements.count > 0 else {
return nil
}
return elements.removeFirst()
}
func makeIterator() -> ReportingSequence {
events.append(.makeIterator)
return self
}
}
final class ReportingAsyncSequence<Element: Sendable>: AsyncSequence, AsyncIteratorProtocol, @unchecked Sendable {
enum Event: Equatable, CustomStringConvertible {
case next
case makeAsyncIterator
var description: String {
switch self {
case .next: return "next()"
case .makeAsyncIterator: return "makeAsyncIterator()"
}
}
}
var events = [Event]()
var elements: [Element]
init(_ elements: [Element]) {
self.elements = elements
}
func next() async -> Element? {
events.append(.next)
guard elements.count > 0 else {
return nil
}
return elements.removeFirst()
}
func makeAsyncIterator() -> ReportingAsyncSequence {
events.append(.makeAsyncIterator)
return self
}
}
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