Function parse_predicate

nodedb/src/control/security/predicate_parser.rs:23–34

Parse a predicate expression string into a compiled `RlsPredicate`. Grammar: ```text expr = or_expr or_expr = and_expr ("OR" and_expr) and_expr = atom ("AND" atom) atom = comparison | contains | intersects | "NOT" atom | "(" expr ")" comparison = field_ref op value_ref contains = value_ref "CONTAINS" value_ref intersects = value_ref "INTERSECTS" value_ref field_ref = identifier |

(input: &str)

/// value_ref  = literal | field_ref
/// ```
pub fn parse_predicate(input: &str) -> Result<RlsPredicate, PredicateParseError> {
    let tokens = tokenize(input)?;
    let mut pos = 0;
    let result = parse_or_expr(&tokens, &mut pos)?;
    if pos < tokens.len() {
        return Err(PredicateParseError::UnexpectedToken {
            token: tokens[pos].clone(),
            position: pos,
        });
    }
    Ok(result)
}

/// Predicate parse errors.
#[derive(Debug, Clone, thiserror::Error)]