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iOS Error Handling in Swift Error Handling Handling Errors

Some assistance with error handling. New topic not related to old posts

Below is my code and it seemed like it was a to the point question but when i look at previous answers, they didn't answer what i needed.

Cant seem to find out where my problem lies, I am getting a error that says i need need my consecutive statements to be separated by a ","

enum ParserError: Error { case emptyDictionary case invalidKey }

struct Parser { var data: [String : String?]?

func parse() throws {
    #1 gaurd let someData = data else{
    throw ParserError.emptyDictionary
    }

    guard let someKeys = "someKey" else {
    throw ParserError.invalidKey
    }

}

}

let data: [String : String?]? = ["someKey": nil] let parser = Parser(data: data)

error.swift
enum ParserError: Error {
  case emptyDictionary
  case invalidKey
}

struct Parser {
  var data: [String : String?]?

  func parse() throws {

  }
}

let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)