Method parse_ann_assign_statement

parser/src/parser/parser.rs:1222–1246

(
        &mut self,
        start: Node,
        lhs: Expression,
    )

    }

    fn parse_ann_assign_statement(
        &mut self,
        start: Node,
        lhs: Expression,
    ) -> Result<Statement, ParsingError> {
        self.bump(Kind::Colon);
        let annotation = self.parse_expression()?;
        let value = if self.eat(Kind::Assign) {
            Some(self.parse_assignment_value()?)
        } else {
            None
        };
        let simple = if let Expression::Name(name) = &lhs {
            !name.parenthesized
        } else {
            false
        };
        Ok(Statement::AnnAssignStatement(Box::new(AnnAssign {
            node: self.finish_node(start),
            target: lhs,
            annotation,
            value,
            simple,
        })))
    }

    // The value is either expression list or yield expression
    // https://docs.python.org/3/reference/simple_stmts.html#assignment-statements