Created
March 28, 2020 13:01
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enum OrderItem: Decodable, Equatable { | |
case food(FoodDelivery) | |
case package(PackageDelivery) | |
case passenger(PassengerDelivery) | |
enum CodingKeys: CodingKey, CaseIterable { | |
case food | |
case package | |
case passenger | |
} | |
init(from decoder: Decoder) throws { | |
let container = try decoder.container(keyedBy: CodingKeys.self) | |
if let value = try container.decodeIfPresent(FoodDelivery.self, forKey: .food) { | |
self = OrderItem.food(value) | |
return | |
} | |
if let value = try container.decodeIfPresent(PackageDelivery.self, forKey: .package) { | |
self = OrderItem.package(value) | |
return | |
} | |
if let value = try container.decodeIfPresent(PassengerDelivery.self, forKey: .passenger) { | |
self = OrderItem.passenger(value) | |
return | |
} | |
throw DecodingError.valueNotFound(Self.self, DecodingError.Context(codingPath: CodingKeys.allCases, debugDescription: "food/package/passenger not found")) | |
} | |
} |
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