CoreStore-JohnEstropia/Sources/KeyPath+KeyPaths.swift

//
//  KeyPath+KeyPaths.swift
//  CoreStore
//
//  Copyright © 2019 John Rommel Estropia
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//  SOFTWARE.
//

import CoreData
import Foundation


// MARK: - KeyPath: AnyKeyPathStringConvertible, KeyPathStringConvertible where Root: NSManagedObject, Value: AllowedObjectiveCKeyPathValue

extension KeyPath: AnyKeyPathStringConvertible, KeyPathStringConvertible where Root: NSManagedObject, Value: AllowedObjectiveCKeyPathValue {

    // MARK: AnyKeyPathStringConvertible

    public var cs_keyPathString: String {

//        return NSExpression(forKeyPath: self).keyPath // in case _kvcKeyPathString becomes private API
        return self._kvcKeyPathString!
    }


    // MARK: KeyPathStringConvertible

    public typealias ObjectType = Root
    public typealias DestinationValueType = Value
}