Maybe.maybe_bind_none: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/maybe.bend as Maybe
Lines 86-91 of bend-mathlib@0.8.1.0/maybe.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/maybe.bend&start_line=86&end_line=91

import Base

# Binding a function that always fails gives None.
law maybe_bind_none:
  for ~A: Data
  for ~B: Data
  for m: Maybe<&2, A>
  {Maybe.bind(&2, A, B, m, x => None{}) == None{} : Maybe<&2, B>}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.bind