Re: Moose hook

On Oct 18, 2011, at 11:09 AM, Elliot Shank wrote:

> On 10/18/11 10:02 AM, Peter Gordon wrote:
>> I would like to be able to define package MyRole such that when it is
>> invoked, runMe() gets run automatically without having to run
>> it explicitly in package Y.
> 
> This has nothing to do with Moose.  It's the same for any module.  You can do something like
> 
> 
>    package Foo;
> 
>    runMe();
> 
>    sub runMe {
>        ...
>    } # end runMe()
> 
>    1;
> 
> 
> When a module gets loaded, it first gets compiled and then the code in the file scope gets run.  This is how the module does its return of a true value: the result of require is the last value returned by execution of the module, which is traditionally handled by putting a "1;" at the end.


That would run only at compile time, and it would have to be invoked as __PACKAGE__->runMe() in the class to get at the meta class for the role (if the intent is to get at the attributes).  Invoking runMe() in &BUILD will instead run per instance, so I guess however it's invoked depends on the need.

chris