Method parse_yield_expression

parser/src/parser/parser.rs:2814–2839

https://docs.python.org/3/reference/expressions.html#yield-expressions

(&mut self)

    // https://docs.python.org/3/reference/expressions.html#yield-expressions
    fn parse_yield_expression(&mut self) -> Result<Expression, ParsingError> {
        let yield_node = self.start_node();
        self.expect(Kind::Yield)?;

        if self.eat(Kind::From) {
            let value = self.parse_expression()?;
            return Ok(Expression::YieldFrom(Box::new(YieldFrom {
                node: self.finish_node(yield_node),
                value,
            })));
        }
        if self.at(Kind::NewLine) || self.at(Kind::Eof) {
            return Ok(Expression::Yield(Box::new(Yield {
                node: self.finish_node(yield_node),
                value: None,
            })));
        }
        let value = match self.parse_expression_list() {
            Ok(expr) => Some(expr),
            _ => None,
        };
        Ok(Expression::Yield(Box::new(Yield {
            node: self.finish_node(yield_node),
            value,
        })))
    }

    // https://docs.python.org/3/reference/expressions.html#expression-lists
    fn parse_expression_list(&mut self) -> Result<Expression, ParsingError> {