CoordinateProofs.fin_from: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/shape/coordinate_proofs.bend as CoordinateProofs
Lines 21-30 of bendtorch-core@0.1.0.0/src/shape/coordinate_proofs.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/shape/coordinate_proofs.bend&start_line=21&end_line=30

import Base
import bendtorch-core@0.1.0.0/src/shape/core.bend as Shape

def fin_from(+bound: Nat, +value: Nat, fits: {True{} == Nat.is_lt(value, bound) : Bool}) -> Shape.Fin(bound):
  match bound value:
    case 0n 0n:
      Empty.absurd(Shape.Fin(0n), Shape.clash(fits))
    case 0n 1n+q:
      Empty.absurd(Shape.Fin(0n), Shape.clash(fits))
    case 1n+p 0n:
      Shape.FZero{}
    case 1n+p 1n+q:
      Shape.FNext{fin_from(p, q, fits)}

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Empty.absurd
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  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=clash