{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"if"}]}
                            if let Some(_) = remaining_fields.remove(&ident) {
                            let ident = self.tcx.adjust_ident(f.ident(self.tcx), variant.def_id);
                                let target_ty = self.field_ty(base_expr.span, f, args);