Moose::Cookbook::Meta::WhyMeta - phpMan

NAME
    Moose::Cookbook::Meta::WhyMeta - Welcome to the meta world (Why Go
    Meta?)

VERSION
    version 2.2200

SUMMARY
    You might want to read Moose::Manual::MOP if you haven't done so yet.

    If you've ever thought "Moose is great, but I wish it did X
    differently", then you've gone meta. The meta recipes demonstrate how to
    change and extend the way Moose works by extending and overriding how
    the meta classes (Moose::Meta::Class, Moose::Meta::Attribute, etc) work.

    The metaclass API is a set of classes that describe classes, roles,
    attributes, etc. The metaclass API lets you ask questions about a class,
    like "what attributes does it have?", or "what roles does the class do?"

    The metaclass system also lets you make changes to a class, for example
    by adding new methods or attributes.

    The interface presented by Moose.pm ("has", "with", "extends") is just a
    thin layer of syntactic sugar over the underlying metaclass system.

    By extending and changing how this metaclass system works, you can
    create your own Moose variant.

  Examples
    Let's say that you want to add additional properties to attributes.
    Specifically, we want to add a "label" property to each attribute, so we
    can write "My::Class->meta()->get_attribute('size')->label()". The first
    recipe shows how to do this using an attribute trait.

    You might also want to add additional properties to your metaclass. For
    example, if you were writing an ORM based on Moose, you could associate
    a table name with each class via the class's metaclass object, letting
    you write "My::Class->meta()->table_name()".

SEE ALSO
    Many of the MooseX modules on CPAN implement metaclass extensions. A
    couple good examples include MooseX::Aliases and MooseX::UndefTolerant.
    For a more complex example see Fey::ORM or Bread::Board::Declare.

AUTHORS
    *   Stevan Little <stevan AT cpan.org>

    *   Dave Rolsky <autarch AT urth.org>

    *   Jesse Luehrs <doy AT cpan.org>

    *   Shawn M Moore <sartak AT cpan.org>

    *   יובל קוג'מן (Yuval Kogman) <nothingmuch AT woobling.org>

    *   Karen Etheridge <ether AT cpan.org>

    *   Florian Ragwitz <rafl AT debian.org>

    *   Hans Dieter Pearcey <hdp AT cpan.org>

    *   Chris Prather <chris AT prather.org>

    *   Matt S Trout <mstrout AT cpan.org>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2006 by Infinity Interactive, Inc.

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