Maybe.maybe_pure_bind_sym: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/maybe.bend as Maybe
Lines 225-231 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=225&end_line=231

import Base

# Left identity: binding a pure value applies the function, reversed to rewrite toward the simple side.
law maybe_pure_bind_sym:
  for ~A: Data
  for ~B: Data
  for -f: A -> Maybe<&2, B>
  for -x: A
  {f(x) == Maybe.bind(&2, A, B, Maybe.pure(&2, A, x), f) : Maybe<&2, B>}

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  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
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.pure
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/maybe.bend&name=maybe_pure_bind