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// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
@_implementationOnly import CoreFoundation
@available(*, unavailable)
extension NSSortDescriptor : @unchecked Sendable { }
// In swift-corelibs-foundation, key-value coding is not available. Since encoding and decoding a NSSortDescriptor requires interpreting key paths, NSSortDescriptor does not conform to NSCoding or NSSecureCoding in swift-corelibs-foundation only.
open class NSSortDescriptor: NSObject, NSCopying {
open override func copy() -> Any {
return copy(with: nil)
}
open func copy(with zone: NSZone? = nil) -> Any {
return self
}
@available(*, unavailable, message: "Key-value coding is not available in swift-corelibs-foundation. Use Swift key paths instead with init(keyPath:ascending:) or init(keyPath:ascending:comparator:)", renamed: "init(keyPath:ascending:)")
public init(key: String?, ascending: Bool) { NSUnsupported() }
@available(*, unavailable, message: "Key-value coding is not available in swift-corelibs-foundation. Use Swift key paths instead with init(keyPath:ascending:) or init(keyPath:ascending:comparator:)", renamed: "init(keyPath:ascending:)")
public init(key: String?, ascending: Bool, comparator cmptr: Comparator) { NSUnsupported() }
@available(*, unavailable, message: "Key-value coding is not available in swift-corelibs-foundation. Use .keyPath instead.", renamed: "keyPath")
open var key: String? { NSUnsupported() }
@available(*, unavailable, message: "Sort descriptors cannot be decoded from archives in swift-corelibs-foundation.")
open func allowEvaluation() {}
// MARK: Available parts.
public init<Root, Value: Comparable>(keyPath: KeyPath<Root, Value>, ascending: Bool) {
self.keyPath = keyPath
self.ascending = ascending
self.lens = { ($0 as! Root)[keyPath: keyPath] }
self.comparator = { (a, b) -> ComparisonResult in
let valueA = a as! Value
let valueB = b as! Value
if valueA < valueB {
return .orderedAscending
} else if valueB < valueA {
return .orderedDescending
} else {
return .orderedSame
}
}
self.reversedSortDescriptorProducer = { return NSSortDescriptor(keyPath: keyPath, ascending: !ascending) }
}
public init<Root, Value>(keyPath: KeyPath<Root, Value>, ascending: Bool, comparator cmptr: @escaping Comparator) {
self.keyPath = keyPath
self.ascending = ascending
self.lens = { ($0 as! Root)[keyPath: keyPath] }
self.comparator = cmptr
self.reversedSortDescriptorProducer = { return NSSortDescriptor(keyPath: keyPath, ascending: !ascending, comparator: cmptr) }
}
private let lens: (Any) -> Any
private let reversedSortDescriptorProducer: () -> NSSortDescriptor
open private(set) var ascending: Bool
open private(set) var keyPath: AnyKeyPath
open private(set) var comparator: Comparator
// primitive - override this method if you want to perform comparisons differently (not key based for example)
open func compare(_ object1: Any, to object2: Any) -> ComparisonResult {
let lhs = lens(object1)
let rhs = lens(object2)
let result = comparator(lhs, rhs)
let actualResult: ComparisonResult
if ascending {
actualResult = result
} else {
switch result {
case .orderedAscending: actualResult = .orderedDescending
case .orderedDescending: actualResult = .orderedAscending
case .orderedSame: actualResult = .orderedSame
}
}
return actualResult
}
open var reversedSortDescriptor: Any {
return reversedSortDescriptorProducer()
}
}
extension NSNumber: Comparable {
public static func < (lhs: NSNumber, rhs: NSNumber) -> Bool {
return lhs.compare(rhs) == .orderedAscending
}
}
extension NSString: Comparable {
public static func < (lhs: NSString, rhs: NSString) -> Bool {
return lhs.compare(rhs._swiftObject) == .orderedAscending
}
}
extension NSDateInterval: Comparable {
public static func < (lhs: NSDateInterval, rhs: NSDateInterval) -> Bool {
return lhs.compare(rhs._swiftObject) == .orderedAscending
}
}
extension NSDate: Comparable {
public static func < (lhs: NSDate, rhs: NSDate) -> Bool {
return lhs.compare(rhs._swiftObject) == .orderedAscending
}
}
extension NSIndexPath: Comparable {
public static func < (lhs: NSIndexPath, rhs: NSIndexPath) -> Bool {
return lhs.compare(rhs._swiftObject) == .orderedAscending
}
}
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