Cap.warn.err: def of ezx@1.13.0.0
Import: import ezx@1.13.0.0/src/share/cap.bend as Cap
Lines 84-90 of ezx@1.13.0.0/src/share/cap.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.13.0.0/src/share/cap.bend&start_line=84&end_line=90

import Base

# the same warning on stderr, for a command whose stdout is the program's
def warn.err(on: Bool) -> IO(Unit):
  match on:
    case True{}:
      IO.pure(Unit, Unit{})
    case False{}:
      IO.print_err(warning())

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.print_err
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=ezx@1.13.0.0/src/share/cap.bend&name=warning