Function parse

nodedb/src/control/promql/parser.rs:14–24

Parse a PromQL expression from a token stream.

(tokens: &[Token])

/// Parse a PromQL expression from a token stream.
pub fn parse(tokens: &[Token]) -> Result<Expr, PromqlError> {
    let mut p = Parser::new(tokens);
    let expr = p.parse_expr(0)?;
    if !p.at_eof() {
        return Err(PromqlError::UnexpectedToken {
            expected: "end of expression".to_string(),
            found: format!("{:?}", p.peek()),
        });
    }
    Ok(expr)
}

struct Parser<'a> {
    tokens: &'a [Token],