NAME

MooX::Role::Parameterized - roles with composition parameters

SYNOPSIS

            

              
              
package Counter;
use Moo::Role;
use MooX::Role::Parameterized;    
use Types::Standard qw( Str );
parameter name => (
    is       => 'ro',  # this is mandatory on Moo
    isa      => Str,   # optional type
    required => 1,     # mark the parameter "name" as "required"
);
role {
    my ( $p, $mop ) = @_;
    my $name = $p->name; # $p->{name} will also work
    $mop->has($name => (
        is      => 'rw',
        default => sub { 0 },
    ));
    $mop->method("increment_$name" => sub {
        my $self = shift;
        $self->$name($self->$name + 1);
    });
    $mop->method("reset_$name" => sub {
        my $self = shift;
        $self->$name(0);
    });
};
package MyGame::Weapon;
use Moo;
use MooX::Role::Parameterized::With;
with Counter => {          # injects 'enchantment' attribute and
    name => 'enchantment', # methods increment_enchantment ( +1 )
};                         # reset_enchantment (set to zero)
package MyGame::Wand;
use Moo;
use MooX::Role::Parameterized::With;
with Counter => {         # injects 'zapped' attribute and
    name => 'zapped',     # methods increment_zapped ( +1 )
};                        # reset_zapped (set to zero)
            
          

DESCRIPTION

It is an experimental port of MooseX::Role::Parameterized to Moo.

FUNCTIONS

This package exports the following subroutines: parameter, role, apply_roles_to_target and apply.

parameter

This function receive the same parameter as Moo::has. If present, the parameter hash reference will be blessed as a Moo class. This is useful to add default values or set some parameters as required.

role

This function accepts just one code block. Will execute this code then we apply the Role in the target classand will receive the parameter hash reference + one mop object.

The params reference will be blessed if there is some parameter defined on this role.

The mop object is a proxy to the target class.

It offer a better way to call has, after, before, around, with and requires without side effects.

Use method to inject a new method and meta to access TARGET_PACKAGE->meta

Please use:

            

              
              
my ($params, $mop) = @_;
...
$mop->has($params->{attribute} =>(...));
$mop->method(name => sub { ... });
$mop->meta->make_immutable;
            
          

apply

Alias to apply_roles_to_target

apply_roles_to_target

When called, will apply the /role on the current package. The behavior depends of the parameter list.

This will install the role in the target package. Does not need call with.

Important, if you want to apply the role multiple times, like to create multiple attributes, please pass an arrayref.

            

              
              
package FooWith;
use Moo;
use MooX::Role::Parameterized::With; # overrides Moo::with
with "Bar" => {           # apply parameterized role Bar once
    attr => 'baz',
    method => 'run'
}, "Other::Role" => [     # apply parameterized role "Other::Role" twice
    { ... },              # with different parameters
    { ... },
],
"Other::Role" => { ...},  # apply it again
"Some::Moo::Role",
"Some::Role::Tiny";
has foo => ( is => 'ro'); # continue with normal Moo code
            
          

STATIC METHOS

is_role

Returns true if the package is a MooX::Role::Parameterized.

            

              
              
MooX::Role::Parameterized->is_role("My::Role");
            
          

DEPRECATED FUNCTIONS

hasp

Removed

method

Removed

VARIABLES

MooX::Role::Parameterized::VERBOSE

By setting $MooX::Role::Parameterized::VERBOSE with some true value we will carp on certain conditions (method override, unable to load package, etc).

Default is false.

MooX::Role::Parameterized::With

See MooX::Role::Parameterized::With package to easily load and apply roles.

Allow to do this:

            

              
              
package FooWith;
use Moo;
use MooX::Role::Parameterized::With; # overrides Moo::with
with "Bar" => {           # apply parameterized role Bar once
    attr => 'baz',
    method => 'run'
}, "Other::Role" => [     # apply parameterized role "Other::Role" twice
    { ... },              # with different parameters
    { ... },
  ],
  "Some::Moo::Role",
  "Some::Role::Tiny";
has foo => ( is => 'ro'); # continue with normal Moo code
            
          

SEE ALSO

MooseX::Role::Parameterized - Moose version

THANKS

• FGA <fabrice.gabolde@gmail.com>

• PERLANCAR <perlancar@gmail.com>

• CHOROBA <choroba@cpan.org>

• Ed J <mohawk2@users.noreply.github.com>

LICENSE

The MIT License

            

              
              
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to
whom the Software is furnished to do so, subject to the
following conditions:
  
 The above copyright notice and this permission notice shall
 be included in all copies or substantial portions of the
 Software.
   
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT
  WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR
  PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.
            
          

AUTHOR

Tiago Peczenyj <tiago (dot) peczenyj (at) gmail (dot) com>

BUGS

Please report any bugs or feature requests on the bugtracker website

cpanm MooX::Role::Parameterized

perl -MCPAN -e shell
install MooX::Role::Parameterized