notation of a sub.

jbrugger has asked for the wisdom of the Perl Monks concerning the following question:

Hi fellow monks,
Recently i'm playing with catalyst and came to the following notation of a sub, that i've never seen:

sub default : Private { ...
or:
sub show : Regex('^(\w+)\.html$') {
[download]

Now i can guess what Private or Regex means ;-) but i don't understand the notation, a sub named default or show and than a : as delimiter to what?

Can anyone please explain?
Thanks

"We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise." - Larry Wall.

Comment on notation of a sub. Download Code

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Re: notation of a sub. by Zaxo (Archbishop) on Jul 19, 2005 at 04:48 UTC
That is the notation for attributes. See perldoc attributes for usage and Attribute::Handlers for customization. After Compline, Zaxo	[reply]
Re^2: notation of a sub. by izut (Chaplain) on Jul 20, 2005 at 16:56 UTC
Well, I read the pointed documentation but still can't figure out how does it works. Any thoughs? Igor S. Lopes - izut surrender to perl. your code, your rules.	[reply]
Re: notation of a sub. by CountZero (Bishop) on Jul 19, 2005 at 06:21 UTC
Catalyst needs those attributes to decide which sub to call when it parses the URL. You can see it working very nicely if you run the included your_app_`server.pl` script. In its debug-output you see it building your packages and subs linked to the URLs it understands. Very nice application this Catalyst. Pity only the docs are not (yet) up to standard. CountZero "If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law	[reply] [d/l]