public static ExpressionValue GetValueFromText(IList <Char> chars) { if (chars == null) { return(null); } if (StringHelper.IsString(chars, '\'')) { var name = StringHelper.ToString2(chars); return(new ExpressionValue( name.Substring(1, name.Length - 2).Replace("\\'", "'"))); } else if (StringHelper.IsInteger(chars)) { return(new ExpressionValue( UniConvert.ParseUniInt64(StringHelper.ToString2(StringHelper.Replace2(chars, ',', '.'))))); } else if (StringHelper.IsNumber(chars)) { return(new ExpressionValue( UniConvert.ParseUniDecimal(StringHelper.ToString2(StringHelper.Replace2(chars, ',', '.'))))); } else if (StringHelper.SequenceEqualInsensitive(chars, OperatorTypeHelper.symbol_null)) { return(new ExpressionValue(null)); } else if (StringHelper.SequenceEqualInsensitive(chars, OperatorTypeHelper.symbol_false)) { return(new ExpressionValue(false)); } else if (StringHelper.SequenceEqualInsensitive(chars, OperatorTypeHelper.symbol_true)) { return(new ExpressionValue(true)); } else if (StringHelper.SequenceEqual(chars, OperatorTypeHelper.symbol_new_line)) { return(new ExpressionValue("\r\n")); } else if (StringHelper.SequenceEqualInsensitive(chars, OperatorTypeHelper.symbol_undefined)) { return(new ExpressionValue(new Undefined())); } return(null); }