{"ast_node_type":"struct","tokens":[{"end":100,"kind":"keyword","start":0,"text":"err.span_label(self.token.span,"}]}
            err.span_label(self.token.span, format!("expected {where_str}`{{` after struct name",));
            let mut err = self.dcx().struct_span_err(self.token.span, msg);
            return Err(err);