NAME
    MooseX::Role::AttributeOverride - Allow roles to modify attributes

VERSION
      This document describes v0.0.5 of MooseX::Role::AttributeOverride - released June 06, 2011 as part of MooseX-Role-AttributeOverride.

SYNOPSIS
        package MyApp::Role;
        use Moose::Role;
        use MooseX::Role::AttributeOverride;

        has_plus 'fun' => (
            default => 'yep',
        );


        package MyApp;
        use Moose 1.9900;

        has 'fun' => (
            is => 'rw',
            isa => 'Str'
        );

        with qw(MyApp::Role);

        package main;
        use feature 'say';

        say "Are you having fun? " . $test->fun;

        # prints 'Are you having fun? yep'

DESCRIPTION
    Moose doesn't allow roles to override attributes using the has '+attr'
    method. There are several good reasons for that. Basically, "that's not
    what a role is for." A role is a set of requirements with defaults. A
    class should always be able to override a role.

    But sometimes you want a role to add features to a class. This is why
    Moose has method modifiers. This extension adds attribute modifiers.

INTERFACE
    has_plus
        This has exactly the same syntax as the Moose has command, except
        you should not use a plus to indicate you are overriding an
        attribute.

    has_plus options

        override_ignore_missing
            Setting this to a true value will allow your role to have
            modifications to attributes that may not exist in the class it
            is applied to. The default is to die in these cases.

            For example:

                package MyApp::Role;
                use Moose::Role;
                use MooseX::Role::AttributeOverride;

                has_plus 'fun' => (
                    default => 'yep',
                    override_ignore_missing => 1,
                );

                package MyApp;
                use Moose;

                with qw(MyApp::Role);
                # I'm not dead yet.

            The above would not die, even though the MyApp package has no
            attribute named 'fun.'

DIAGNOSTICS
    Can't find attribute $attr required by $role
        You will see this error if your role has an attribute modification
        for an attribute that is not in the class. You can squash this by
        setting the 'override_ignore_missing' option in your 'has_plus'
        command.

    Attempt to call has_plus on an invalid object
        You really should never see this. Please file a bug report if you
        do. A test case would be nice as well.

    Illegal inherited options
        Moose will throw this error if you try to change an accessor option.
        See the Moose manual for more details.

    Do not use a plus prefix with the has_plus sugar
        There is no need for a plus sign on your attribute:

            # Good
            has 'children', trait => ['good']

            # Bad. Will die.
            has '+children', trait => ['naughty']

DEPENDENCIES
    Moose 1.9900 or newer. Older versions may be supported in a future
    version of this module.

INCOMPATIBILITIES
    I am sure that there are some MooseX modules that will not work with
    this. Please let me know, and I will at least document them.

BUGS AND LIMITATIONS
    This is not the intended use of roles. As a result, take into account
    the following:

    *   Order matters! If two roles modify the same attribute in the same
        way, the second one applied will be the one that is used. This
        behavior, however, relies on Moose keeping track of order, which it
        generally does a good job of, but no guarantees.

    *   Currently, the value of the attribute is clobbered when the role is
        applied. This may change in the future.

    *   This works the same as '+has'. This means that you can't override
        accessor methods. This is a very sensible Moose limitation.

    I am relatively new to Moose. I had an itch, and wrote this Module to
    scratch it. Please let me know how to make this module better.

    For bugs, test cases are great!

SEE ALSO
    Please see those modules/websites for more information related to this
    module.

    *   Moose

    *   Moose::Manual::Attributes

SUPPORT
  Websites
    The following websites have more information about this module, and may
    be of help to you. As always, in addition to those websites please use
    your favorite search engine to discover more resources.

    *   Search CPAN

        The default CPAN search engine, useful to view POD in HTML format.

        <http://search.cpan.org/dist/MooseX-Role-AttributeOverride>

    *   CPAN Testers Dependencies

        The CPAN Testers Dependencies is a website that shows a chart of the
        test results of all dependencies for a distribution.

        <http://deps.cpantesters.org/?module=MooseX::Role::AttributeOverride
        >

    *   CPANTS

        The CPANTS is a website that analyzes the Kwalitee ( code metrics )
        of a distribution.

        <http://cpants.perl.org/dist/overview/MooseX-Role-AttributeOverride>

    *   CPAN Testers

        The CPAN Testers is a network of smokers who run automated tests on
        uploaded CPAN distributions.

        <http://www.cpantesters.org/distro/M/MooseX-Role-AttributeOverride>

    *   CPAN Testers Matrix

        The CPAN Testers Matrix is a website that provides a visual way to
        determine what Perls/platforms PASSed for a distribution.

        <http://matrix.cpantesters.org/?dist=MooseX-Role-AttributeOverride>

  Email
    You can email the author of this module at "EALLENIII at cpan.org"
    asking for help with any problems you have.

  Bugs / Feature Requests
    Please report any bugs or feature requests by email to
    "bug-moosex-role-attributeoverride at rt.cpan.org", or through the web
    interface at
    <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=MooseX-Role-AttributeOve
    rride>. You will be automatically notified of any progress on the
    request by the system.

  Source Code
    The code is open to the world, and available for you to hack on. Please
    feel free to browse it and play with it, or whatever. If you want to
    contribute patches, please send me a diff or prod me to pull from your
    repository :)

    <http://github.com/riemann42/MooseX-Role-AttributeOverride>

      git clone git://github.com/riemann42/MooseX-Role-AttributeOverride.git

AUTHOR
    Edward Allen <ealleniii_at_cpan_dot_org>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2011 by Edward J. Allen III.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

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    PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
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