Make your basic data structure look something like this: 
my @actions = (
  qr/thingy(with)parens(to)boot/ => sub { do this },
  qr/smile(and)frown/ => [sub { do this }, sub {and this }],
  qr/another(one)bites(the)dust)/ => undef,
);

[download]
Now the execution engine would look like: 
$_ = some line;
my @tmp = @actions;
while (@tmp) {
  my ($qr, $ops) = splice @actions, 0, 2;
  if (my @matches = /$qr/) {
    if (not defined $ops) {
      $default->(@matches);
    } elsif (ref $ops eq 'CODE') {
      $ops->(@matches);
    } elsif (ref $ops eq 'ARRAY') {
      $_->(@matches) for @$ops;
    } else { die "bad" }
    last;
  }
}

[download]
I'm sure you can figure out where to make these object instance variables. Hope this helps.

-- Randal L. Schwartz, Perl hacker

In reply to Re: Speed vs Laziness by merlyn
in thread Speed vs Laziness by Anonymous Monk

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