{"ast_node_type":"variable","tokens":[{"end":38,"kind":"keyword","start":0,"text":"let"}]}
                    let tagged_discr =
                    let is_niche = bx.icmp(IntPredicate::IntEQ, tag, niche_start_const);
                        bx.cx().const_uint(cast_to, niche_variants.start().as_u32() as u64);