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[refactoring] Re-implement qck_enumerateSubclasses in Swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,39 +1,46 @@ | ||
| import Foundation | ||
| import XCTest | ||
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| // NOTE: This file is not intended to be included in the Xcode project or CocoaPods. | ||
| // It is picked up by the Swift Package Manager during its build process. | ||
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| #if SWIFT_PACKAGE | ||
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| open class QuickConfiguration: NSObject { | ||
| open class func configure(_ configuration: Configuration) {} | ||
| } | ||
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| #endif | ||
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| #if canImport(Darwin) | ||
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| internal func qck_enumerateSubclasses<T: AnyObject>(_ klass: T.Type, block: (T.Type) -> Void) { | ||
| var classesCount = objc_getClassList(nil, 0) | ||
| extension QuickConfiguration { | ||
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| guard classesCount > 0 else { | ||
| return | ||
| } | ||
| /// Finds all direct subclasses of QuickConfiguration and passes them to the block provided. | ||
| /// The classes are iterated over in the order that objc_getClassList returns them. | ||
| /// | ||
| /// - parameter block: A block that takes a QuickConfiguration.Type. | ||
| /// This block will be executed once for each subclass of QuickConfiguration. | ||
| @objc static func enumerateSubclasses(_ block: (QuickConfiguration.Type) -> Void) { | ||
| var classesCount = objc_getClassList(nil, 0) | ||
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| let classes = UnsafeMutablePointer<AnyClass?>.allocate(capacity: Int(classesCount)) | ||
| classesCount = objc_getClassList(AutoreleasingUnsafeMutablePointer(classes), classesCount) | ||
| guard classesCount > 0 else { | ||
| return | ||
| } | ||
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| var subclass: AnyClass! | ||
| for i in 0..<classesCount { | ||
| subclass = classes[Int(i)] | ||
| let classes = UnsafeMutablePointer<AnyClass?>.allocate(capacity: Int(classesCount)) | ||
| defer { free(classes) } | ||
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| guard let superclass = class_getSuperclass(subclass), superclass == klass else { continue } | ||
| classesCount = objc_getClassList(AutoreleasingUnsafeMutablePointer(classes), classesCount) | ||
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| block(subclass as! T.Type) // swiftlint:disable:this force_cast | ||
| } | ||
| for i in 0..<classesCount { | ||
| guard | ||
| let subclass = classes[Int(i)], | ||
| let superclass = class_getSuperclass(subclass), | ||
| superclass == QuickConfiguration.self | ||
| else { continue } | ||
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| free(classes) | ||
| // swiftlint:disable:next force_cast | ||
| block(subclass as! QuickConfiguration.Type) | ||
| } | ||
| } | ||
| } | ||
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| #endif | ||
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| #endif |
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