Sort.fwds: def of bend-parallel@0.1.0.0
Import: import bend-parallel@0.1.0.0/sort.bend as Sort
Lines 265-280 of bend-parallel@0.1.0.0/sort.bend: https://jend.leeeet.dev/read.txt?path=bend-parallel@0.1.0.0/sort.bend&start_line=265&end_line=280

import Base
import bend-parallel@0.1.0.0/histogram.bend as Hist

# The forks, shaped as pass 2b's, with two handles each to the table and
# the offsets. Group j reads only its own offsets and reads and writes
# only its columns of the table.
def fwds(+d: Nat, +j: U32, +w: Nat, +k: U32, +kb: Nat, +nb: Nat, ft: Array<U32> & Array<U32>, fo: Array<U32> & Array<U32>) -> Hist.Two:
  match d:
    case 0n:
      (t, t2) = ft
      (os, os2) = fo
      Hist.two.rejoin(t2, os2, fwd.cols(U32.to_nat((U32.shln(1, w) - 1 : U32)), U32.shln(j, w), k, kb, nb, Hist.Two{t, os}))
    case 1n+p:
      (t0, t1) = ft
      (o0, o1) = fo
      +i = (j * 2 : U32)
      l r = fwds(p, i, w, k, kb, nb, Array.fork(U32, t0), Array.fork(U32, o0))
        fwds(p, (i + 1 : U32), w, k, kb, nb, Array.fork(U32, t1), Array.fork(U32, o1))
      Hist.two.join(l, r)

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array.fork
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.shln
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=bend-parallel@0.1.0.0/histogram.bend&name=Two
  https://jend.leeeet.dev/definition.txt?path=bend-parallel@0.1.0.0/histogram.bend&name=two.join
  https://jend.leeeet.dev/definition.txt?path=bend-parallel@0.1.0.0/histogram.bend&name=two.rejoin
  https://jend.leeeet.dev/definition.txt?path=bend-parallel@0.1.0.0/sort.bend&name=fwd.cols