Initialize IndexPath with description in Swift

IndexPath.swift

import Foundation

extension IndexPath {
	
	enum IndexPathFromStringError: Error {
		case couldNotInitialize(String)
	}
	
	/// Initialize with description. e.g. "[2, 3, 12, 0, 4]"
	init(from description: String) throws {
		let regex = /\[((\d+)(, \d+)*)\]/
		if let match = description.firstMatch(of: regex)?.1 {
			let elements = match.split(separator: ", ").map { Int($0) ?? 0 }
			self.init(indexes: elements)
		}
		else {
			throw IndexPathFromStringError.couldNotInitialize(description)
		}
	}
	
}