{"ast_node_type":"variable","tokens":[{"end":34,"kind":"keyword","start":0,"text":"let"}]}
                let tagged_discr =
                let is_niche = codegen_icmp_imm(fx, IntCC::Equal, tag, niche_start as i128);
                    fx.bcx.ins().iconst(cast_to, niche_variants.start().as_u32() as i64);