Method opt_parse

components/dada-parser/src/expr.rs:18–23

(
        db: &'db dyn crate::Db,
        parser: &mut Parser<'_, 'db>,
    )

    type Output = Self;

    fn opt_parse(
        db: &'db dyn crate::Db,
        parser: &mut Parser<'_, 'db>,
    ) -> Result<Option<Self::Output>, crate::ParseFail<'db>> {
        opt_parse_expr_with_precedence(db, parser, binary_expr_precedence::<SELECT_ALL>)
    }

    fn expected() -> crate::Expected {
        crate::Expected::Nonterminal("expression")