IP regex matching madness Puppet

IP_regex

  $parents = $::ipaddress ? {
    /^172.16.2.([^1]{1}|[0-9]{2,3})/                                                                                                                                                                                 => 'some.example.org',
    /^172.16.3.([^1]{1}|[0-9]{2,3})/                                                                                                                                                                                 => 'random.example.org',
    /^172.16.4.([^1]{1}|[0-9]{2,3})/                                                                                                                                                                                 => 'machines.example.org',
    /^172.16.5.([^1]{1}|[0-9]{2,3})/                                                                                                                                                                                 => 'on.example.org',
    /^192.168.100/                                                                                                                                                                                                   => 'the.example.org',
    /^172\.18\.(?!(1\.2)$)/                                                                                                                                                                                          => 'network.example.org',
    /^10\.0\.(3.([2-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))|((3[3-9]|[4-5][0-9]|6[0-2]).([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5])))|63.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-4])))$/ => 'are.example.org',
    /^10\.0\.((64\.([2-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))|((6[5-9]|[78][0-9]|9[0-4])\.([1-9][0-9]?|1[0-9]{2}|2[0-4][0-9]|25[0-5]))|(95\.([1-9][0-9]?|1[0-9]{2}|2[0-4][0-9]|25[0-4])))$/                   => 'partying.example.org',
    default                                                                                                                                                                                                          => 'hard.example.org',
  }