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iOS Error Handling in Swift Error Handling Handling Errors

Pratham Mishra
Pratham Mishra
14,191 Points
Posted by Pratham Mishra
Pratham Mishra
14,191 Points

Can someone tell me what's wrong with my code, as I am getting an error:- Your code could not be compiled

I'm not able to understand the reason behind the error!

error.swift 
enum ParserError: Error {
    case emptyDictonary
    case invalidKey
}
struct Parser {
    var data: [String : String?]?

    func parse() throws {
        guard let parseData = data else {
            throw ParserError.emptyDictonary
        }
        guard parseData.keys.contains("someKey") else {
            throw ParserError.invalidKey
        }
    }
}
let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data : data)

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

If you use the "preview" button, it will show you the messages from the complier. In this case:

swift_lint.swift:13:19: error: type 'ParserError' has no member 'emptyDictonary'
            throw ParserError.emptyDictonary
                  ^~~~~~~~~~~ ~~~~~~~~~~~~~~
swift_lint.swift:4:8: note: did you mean 'emptyDictionary'?
  case emptyDictionary
       ^

So the issue is the speilling of "emptyDictonary" instead of "emptyDictionary".