Syntax |
| Member name | Value | Description of the |
|---|---|---|
| NONE | 0 | An operand |
| GROUP | 1 | An opening bracket |
| UNGROUP | 2 | A closing bracket |
| OPERATOR | 3 | A logical or arithmetic operator |
| LEFT | 4 | Left operand for an operator (partial expression) |
| RIGHT | 5 | Right operand for an operator (partial expression) |
| STRUCT | 6 | Prioritised sub-expression (bracketed expression) |