{"ast_node_type":"variable","tokens":[{"end":25,"kind":"keyword","start":0,"text":"let"}]}
        let discr_value =
        let enum_ty_layout = self.tcx.layout_of(self.typing_env.as_query_input(enum_ty)).ok()?;
            self.ecx.discriminant_for_variant(enum_ty_layout.ty, variant_index).discard_err()?;