def next.at
import bend-kit-llm@0.13.0.1/sse.bend as Sseimport Base
285def next.at(+len: U32, +seen: U32, st: St, r: Array<U32> & U32 & Bool) -> Reader & Next:
286 (a, +pos, cr) = r
287 loop(Nat.add(U32.to_nat((len - pos : U32)), 2n), line(a, len, pos, seen, cr, st), len)