Lucene.Net.QueryParsers.Surround.Parser.QueryParser.OptionalFields C# (CSharp) Method

        public IEnumerable<string> OptionalFields()
        {
            Token fieldName;
            IList<string> fieldNames = null;

            while (true)
            {
                if (Jj_2_1(2))
                {
                    ;
                }
                else
                {
                    goto label_1;
                }
                // to the colon
                fieldName = Jj_consume_token(RegexpToken.TERM);
                Jj_consume_token(RegexpToken.COLON);
                if (fieldNames == null)
                {
                    fieldNames = new List<string>();
                }
                fieldNames.Add(fieldName.image);
            }
        label_1:
            { if (true) return fieldNames; }
            throw new Exception("Missing return statement in function");
        }