ref: 0c0a9801c0e2b92832a9f91d6a6e7f94e8ba277d dir: /libstd/try.myr/
use "option.use" use "fmt.use" pkg std = generic try : (v : option(@a) -> @a) ;; generic try = {v match v | `Some x: -> x | `None: fatal(1, "expected `Some @a, got `None\n") ;; }