In some cases you do need the power of a hash based dispatch, for instance if you wanted to assign a "security level" required to execute each sub, or complicated things of that nature. But for just doing quick "switch" type dispatches, this way is much faster to type and easier to maintain.

Uhhh ... that's not quite right. If you're going to go to all the trouble of actually making a new package and a new file (cause, you might as well make these shareable!), then you'd probably also add a security function somewhere. I would envision something like: 

package dispatch;

my %disallowed = (
    security => 1,
);
sub security
{
    # Handle security here, somehow, returning a boolean.
}

# Because we're overloading can(), we can easily make it play nicely w
+ith AUTOLOAD.
sub can
{
    my $proto = shift;
    my ($method) = @_;

    return '' if $disallowed{$method};
    UNIVERSAL::can($proto, $method);
}

#### Functions to dispatch to below here

---------------

if (dispatch->security( ... ) and my $method = dispatch->can( ... ))
{
    $method->(@args);
}

[download]

Now, to correct a misconception - without serious craziness of the Devel:: variety, you cannot access a lexically scoped variable outside its scope. Period, Do Not Pass Go, End Of Story. In other words, it's not an issue. This goes for packages or closures. (That's kinda why they're called "closures".)

------
We are the carpenters and bricklayers of the Information Age.

Then there are Damian modules.... *sigh* ... that's not about being less-lazy -- that's about being on some really good drugs -- you know, there is no spoon. - flyingmoose

In reply to Re: Re: Re: Automating dispatch tables by dragonchild
in thread Automating dispatch tables by BUU

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