Publisher.swift

extension Published: Codable where Value: Codable {
    enum CodingKeys: CodingKey {
        case value
    }
    
    public init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        let value = try container.decode(Value.self, forKey: .value)
        self.init(initialValue: value)
    }
    
    public func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self)
        var mutableSelf = self
        let _ = mutableSelf.projectedValue.sink(receiveValue: {
            try! container.encode($0, forKey: .value)
        })
    }
}