package main import "fmt" func runLine(line any) (any, string) { switch line.(type) { case translateNumber: return (numberToString(line.(translateNumber).number, 0)), "" case translateString: return (line.(translateString).str), "" } return nil, "Error: invalid code on line " + fmt.Sprint(line.(translateNumber).line) + ": " + line.(translateNumber).code } // returns error func run(translated []any) (any, string) { for _, val := range translated { _, err := runLine(val) if err != "" { return nil, err } } return nil, "" }