ref: 151ac13992ccc9c1b02c3fa32a36c2588edcc2f5
dir: /libstd/waitstatus+freebsd.myr/
use "die.use" pkg std = type waitstatus = union `Waitexit int32 `Waitsig int32 `Waitstop int32 ;; const waitstatus : (st : int32 -> waitstatus) ;; const waitstatus = {st match st & 0o177 | 0: -> `Waitexit (st >> 8) | 0x7f:-> `Waitstop (st >> 8) | sig: -> `Waitsig sig ;; die("unreachable") }