Mergeable Protocol Example

Mergeable.swift

import Foundation

protocol Mergeable {
    func merge(_ target: Self)
}

extension Mergeable {
    func merge(_ target: Self) {
        guard let source = self as? NSObject else { return }
        
        let mirrorSource = Mirror(reflecting: source)
        let mirrorTarget = Mirror(reflecting: target)
        
        for sourceItem in mirrorSource.children {
            for targetItem in mirrorTarget.children {
                if let targetLabel = targetItem.label,
                    sourceItem.label == targetLabel {
                    source.setValue(targetItem.value, forKey: targetLabel)
                }
            }
        }
    }
}