{"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"if"}]}
        if let ExprKind::Path(qself, path) = &expr.kind {
    ) -> Option<(&'a Option<AstP<QSelf>>, &'a Path)> {
            // Does the path resolve to something disallowed in a tuple struct/variant pattern?