Method check_tuple_unpacking

crates/ruff_python_parser/src/parser/statement.rs:503–522

Report [`UnsupportedSyntaxError`]s for each starred element in `expr` if it is an unparenthesized tuple. This method can be used to check for tuple unpacking in `return`, `yield`, and `for` statements, which are only allowed after [Python 3.8] and [Python 3.9], respectively. [Python 3.8]: https://github.com/python/cpython/issues/76298 [Python 3.9]: https://github.com/python/cpython/issues/90881

(&mut self, expr: &Expr, kind: UnsupportedSyntaxErrorKind)

    /// [Python 3.8]: https://github.com/python/cpython/issues/76298
    /// [Python 3.9]: https://github.com/python/cpython/issues/90881
    pub(super) fn check_tuple_unpacking(&mut self, expr: &Expr, kind: UnsupportedSyntaxErrorKind) {
        if kind.is_supported(self.options.target_version) {
            return;
        }

        let Expr::Tuple(ast::ExprTuple {
            elts,
            parenthesized: false,
            ..
        }) = expr
        else {
            return;
        };

        for elt in elts {
            if elt.is_starred_expr() {
                self.add_unsupported_syntax_error(kind, elt.range());
            }
        }
    }

    /// Parses a `raise` statement.
    ///