{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"operator_parent.and_then(ast::PrefixExpr::cast).and_then(|e|"}]}
                operator_parent.and_then(ast::PrefixExpr::cast).and_then(|e| e.expr());
            let prefix_expr =
            match prefix_expr {