Sbx.start: def of unified-nsga-iii@0.2.2.0
Import: import unified-nsga-iii@0.2.2.0/sbx.bend as Sbx
Lines 161-183 of unified-nsga-iii@0.2.2.0/sbx.bend: https://jend.leeeet.dev/read.txt?path=unified-nsga-iii@0.2.2.0/sbx.bend&start_line=161&end_line=183

import Base
import unified-nsga-iii@0.2.2.0/individual.bend as Ind
import unified-nsga-iii@0.2.2.0/bounds.bend as Bounds
import unified-nsga-iii@0.2.2.0/rng.bend as Rng

def start(
  +eta: F32,
  +x1s: List<&2, F32>,
  +x2s: List<&2, F32>,
  +box: Bounds.Box,
  rng: Rng.State,
  +m: Nat,
  n: Nat
) -> Rng.State & Ind.Individual & Ind.Individual:
  match n:
    case 0n:
      (rng, Ind.from_variables(x1s, m), Ind.from_variables(x2s, m))
    case 1n+f:
      +rng2 = Rng.next_double(rng)
      finish(
        m,
        loop(
          1n+f,
          F32.is_gt(Rng.last_double(rng2), 0.5),
          close_heads(x1s, x2s),
          eta, x1s, x2s, Bounds.intervals_of(box), rng2, Nil{}, Nil{}
        )
      )

Uses (16):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32.is_gt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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=unified-nsga-iii@0.2.2.0/bounds.bend&name=Box
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/bounds.bend&name=intervals_of
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/individual.bend&name=Individual
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/individual.bend&name=from_variables
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/rng.bend&name=State
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/rng.bend&name=last_double
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/rng.bend&name=next_double
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/sbx.bend&name=close_heads
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/sbx.bend&name=finish
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/sbx.bend&name=loop