MooseX::Role::Parameterized::Extending - extending MooseX::Role::Parameterized roles |
MooseX::Role::Parameterized::Extending - extending MooseX::Role::Parameterized roles
version 1.08
There are heaps of useful modules in the MooseX
namespace that you can use
to make your roles more powerful. However, they do not always work out of the
box with the MooseX::Role::Parameterized manpage, but it's fairly straight-forward to
achieve the functionality you desire.
the MooseX::Role::Parameterized manpage was designed to be as extensible as the rest of
Moose, and as such it is possible to apply custom traits to both the
parameterizable role or the ordinary roles they generate. In this example, we
will look at applying the fake trait MooseX::MagicRole
to a parameterizable
role.
First we need to define a new metaclass for our parameterizable role.
package MyApp::Meta::Role::Parameterizable; use Moose; extends 'MooseX::Role::Parameterized::Meta::Role::Parameterizable'; with 'MooseX::MagicRole';
This is a class (observe that it uses Moose, not the Moose::Role manpage) which extends the class which governs parameterizable roles. the MooseX::Role::Parameterized::Meta::Role::Parameterizable manpage is the metaclass that packages using the MooseX::Role::Parameterized manpage receive by default.
Note that the class we are extending, MooseX::Role::Parameterized::Meta::Role::Parameterizable, is entirely distinct from the similarly-named class which governs the ordinary roles that parameterized roles generate. An instance of MooseX::Role::Parameterized::Meta::Role::Parameterized represents a role with its parameters already bound.
Now we can take advantage of our new subclass by specifying that we want to use
MyApp::Meta::Role::Parameterizable
as our metaclass when importing
the MooseX::Role::Parameterized manpage:
package MyApp::Role; use MooseX::Role::Parameterized -metaclass => 'MyApp::Meta::Role::Parameterizable';
role { ... }
And there you go! MyApp::Role
now has the MooseX::MagicRole
trait applied.
Shawn M Moore <code@sartak.org>
This software is copyright (c) 2008 by Shawn M Moore.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
MooseX::Role::Parameterized::Extending - extending MooseX::Role::Parameterized roles |