Enum describing possible function parsing errors.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/errors/function_parsing_error.proto)

| Enums ||
|---|---|
| ## `EXPECTED_CHARACTER` | Could not find an expected character. |
| ## `FEED_ATTRIBUTE_OPERAND_ARGUMENT_NOT_INTEGER` | Feed attribute operand's argument is not an integer. |
| ## `INVALID_OPERATOR_NAME` | Invalid operator/function name. |
| ## `MISSING_RIGHT_HAND_OPERAND` | Missing right-hand-side operand. |
| ## `NO_MORE_INPUT` | Unexpected end of function string. |
| ## `NO_OPERANDS` | Missing function operands. |
| ## `TOO_MANY_NESTED_FUNCTIONS` | Functions are nested too deeply. |
| ## `TOO_MANY_OPERANDS` | Function had too many operands. |
| ## `UNEXPECTED_SEPARATOR` | Unexpected separator character. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNMATCHED_LEFT_BRACKET` | Unmatched left bracket or parenthesis. |
| ## `UNMATCHED_RIGHT_BRACKET` | Unmatched right bracket or parenthesis. |
| ## `UNSPECIFIED` | Enum unspecified. |