Algorithm.u_next: def of unified-nsga-iii@0.2.2.0
Import: import unified-nsga-iii@0.2.2.0/algorithm.bend as Algorithm
Lines 344-349 of unified-nsga-iii@0.2.2.0/algorithm.bend: https://jend.leeeet.dev/read.txt?path=unified-nsga-iii@0.2.2.0/algorithm.bend&start_line=344&end_line=349

import Base
import unified-nsga-iii@0.2.2.0/individual.bend as Ind
import unified-nsga-iii@0.2.2.0/rng.bend as Rng
import unified-nsga-iii@0.2.2.0/polynomial_mutation.bend as Poly
import unified-nsga-iii@0.2.2.0/problems.bend as Prob
import unified-nsga-iii@0.2.2.0/util.bend as Util

def u_next(+parents: List<&2, Ind.Individual>, +prob: Prob.Problem, +mut_p: F32, +elim: Bool, hold: UHold) -> UHold:
  match hold:
    case UH{rng, acc, seen, need}:
      +n = Util.list_len(Ind.Individual, parents)
      +rng_i = Rng.next_nat(rng, n)
      u_step(elim, acc, seen, need, Poly.mutate(Poly.default(), get_ind(parents, Rng.last_nat(rng_i)), Prob.box_of(prob), rng_i, mut_p))

Uses (14):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/algorithm.bend&name=UHold
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/algorithm.bend&name=get_ind
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/algorithm.bend&name=u_step
  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/polynomial_mutation.bend&name=default
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/polynomial_mutation.bend&name=mutate
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/problems.bend&name=Problem
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/problems.bend&name=box_of
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/rng.bend&name=last_nat
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/rng.bend&name=next_nat
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/util.bend&name=list_len