Nat.le_case: def of bend-lawful-stdlib@0.1.0.0
Import: import bend-lawful-stdlib@0.1.0.0/src/nat.bend as Nat
Lines 99-107 of bend-lawful-stdlib@0.1.0.0/src/nat.bend: https://jend.leeeet.dev/read.txt?path=bend-lawful-stdlib@0.1.0.0/src/nat.bend&start_line=99&end_line=107

import Base

# Compares a and b and returns the proof of the side that holds.
def le_case(a: Nat, b: Nat) -> Or(LE(a, b), LE(b, a)):
  match a b:
    case 0n y:
      Inl{Unit{}}
    case 1n+x 0n:
      Inr{Unit{}}
    case 1n+x 1n+y:
      le_case(x, y)

Uses (5):
  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=Or
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=bend-lawful-stdlib@0.1.0.0/src/nat.bend&name=LE