{"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"if"}]}
            if !zst
            let zst = self.ecx.size_and_align_of_val(val)?.is_some_and(|(s, _a)| s.bytes() == 0);
                && let Some(def) = val.layout.ty.ty_adt_def()