NatExtrema.pick_upper: def of stelliferous@0.0.2.0
Import: import stelliferous@0.0.2.0/proofs/nat_extrema.bend as NatExtrema
Lines 62-66 of stelliferous@0.0.2.0/proofs/nat_extrema.bend: https://jend.leeeet.dev/read.txt?path=stelliferous@0.0.2.0/proofs/nat_extrema.bend&start_line=62&end_line=66

import Base

def pick_upper(choice: Bool,+left: Nat,+right: Nat,+upper: Nat,left_ok: {Nat.is_le(left,upper) == True{} : Bool},right_ok: {Nat.is_le(right,upper) == True{} : Bool}) ->
  {Nat.is_le(Bool.pick(Nat,choice,left,right),upper) == True{} : Bool}:
  match choice:
    case False{}: right_ok
    case True{}: left_ok

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  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_le