Maybe.maybe_map_pure: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/maybe.bend as Maybe
Lines 45-51 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=45&end_line=51

import Base

# Mapping a pure value is pure of the mapped value.
law maybe_map_pure:
  for ~A: Data
  for ~B: Data
  for -f: A -> B
  for -x: A
  {Maybe.map(&2, A, B, f, Maybe.pure(&2, A, x)) == Maybe.pure(&2, B, f(x)) : Maybe<&2, B>}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.map
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe.pure