MooseX::Role::ParameteUserdContributeMooseX::Role::Parameterized::Extending(3)NAME
MooseX::Role::Parameterized::Extending - extending
MooseX::Role::Parameterized roles
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::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 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.
perl v5.16.2201MooseX::Role::Parameterized::Extending(3)
