maat/docs/example_scripts/sample_2.pi

#!/usr/bin/env ruby

enum DirStat <CanWrite NoDir NoWrite>

func check_dir_state(str) DirStat {
  if str.is_dir {
    var f = "#str/.tmp"

    spurt f, "some text" or return NoWrite
    unlink f
    return CanWrite
  }
  return NoDir
}

var dirs = ['/tmp', '/', '~/tmp']
for dirs -> dir {
    var stat = check_dir_state(dir)

    say "status of dir '#dir': #stat"
    if stat ~~ CanWrite {
        say " user can write to dir: #dir";
    }
}