NAME¶
MooseX::Role::Parameterized::Extending - extending MooseX::Role::Parameterized
roles
VERSION¶
version 1.08
DESCRIPTION¶
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 MooseX::Role::Parameterized, but it's fairly straight-forward
to achieve the functionality you desire.
MooseX::Role::Parameterized 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 Moose::Role) which extends the
class which governs parameterizable roles.
MooseX::Role::Parameterized::Meta::Role::Parameterizable is the metaclass that
packages using MooseX::Role::Parameterized receive by default.
Note that the class we are extending,
MooseX::Role::Parameterized::Meta::Role::Parameteriz
able, 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::Parameteriz
ed 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
MooseX::Role::Parameterized:
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.
NAME¶
AUTHOR¶
Shawn M Moore <code@sartak.org>
COPYRIGHT AND LICENSE¶
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.