Lazy.either: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/lazy/lazy.bend as Lazy
Lines 42-49 of bolt@1.27.0.0/src/lazy/lazy.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/lazy/lazy.bend&start_line=42&end_line=49

import Base

# what yes gives when c, else what no gives: a pick whose two branches each
# recurse, only the one taken run
def either(-A: Type, cc: Bool, yes: Unit -> A, no: Unit -> A) -> A:
  match cc:
    case True{}:
      yes(Unit{})
    case False{}:
      no(Unit{})

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