Core.Fin.split: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/shape/core.bend as Core
Lines 81-90 of bendtorch-core@0.1.0.0/src/shape/core.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&start_line=81&end_line=90

import Base

def Fin.split(+a: Nat, +b: Nat, index: Fin(Nat.add(a, b))) -> Either<Fin(a), Fin(b)>:
  match a:
    case 0n:
      Inr{index}
    case 1n+p:
      match index:
        case FZero{}:
          Inl{FZero{}}
        case FNext{previous}:
          Fin.split.step(p, b, Fin.split(p, b, previous))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Either
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=Fin
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=Fin.Step
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=Fin.split.step