Errors.swift

enum MagicError: Error {
    case spellFailure
}

func castSpell(_spell: String) -> Result<String, MagicError> {
    
    switch _spell {
    case "flowers":
        return .success("Flowers falling from sky")
    case "stars":
        return .success("Stars lighting up your way")
    default:
        return .failure(MagicError.spellFailure)
    }
    
}

let spell = castSpell(_spell: "stars")