Moose::Cookbook(3pm) User Contributed Perl Documentation Moose::Cookbook(3pm)
NAME
Moose::Cookbook - How to cook a Moose
VERSION
version 2.2200
DESCRIPTION
The Moose cookbook is a series of recipes showing various Moose
features. Most recipes present some code demonstrating some feature,
and then explain the details of the code.
You should probably read the Moose::Manual first. The manual explains
Moose concepts without being too code-heavy.
RECIPES
Basic Moose
These recipes will give you a good overview of Moose's capabilities,
starting with simple attribute declaration, and moving on to more
powerful features like laziness, types, type coercion, method
modifiers, and more.
Moose::Cookbook::Basics::Point_AttributesAndSubclassing
A simple Moose-based class. Demonstrates basic Moose attributes and
subclassing.
Moose::Cookbook::Basics::BankAccount_MethodModifiersAndSubclassing
A slightly more complex Moose class. Demonstrates using a method
modifier in a subclass.
Moose::Cookbook::Basics::BinaryTree_AttributeFeatures
Demonstrates several attribute features, including types, weak
references, predicates ("does this object have a foo?"), defaults,
laziness, and triggers.
Moose::Cookbook::Basics::Company_Subtypes
Introduces the creation and use of custom types, a "BUILD" method,
and the use of "override" in a subclass. This recipe also shows how
to model a set of classes that could be used to model companies,
people, employees, etc.
Moose::Cookbook::Basics::HTTP_SubtypesAndCoercion
This recipe covers more subtype creation, including the use of type
coercions.
Moose::Cookbook::Basics::Immutable
Making a class immutable greatly increases the speed of accessors
and object construction.
Moose::Cookbook::Basics::BinaryTree_BuilderAndLazyBuild - Builder
methods and lazy_build
The builder feature provides an inheritable and role-composable way
to provide a default attribute value.
Moose::Cookbook::Basics::Genome_OverloadingSubtypesAndCoercion
Demonstrates using operator overloading, coercion, and subtypes to
model how eye color is determined during reproduction.
Moose::Cookbook::Basics::Person_BUILDARGSAndBUILD
This recipe demonstrates the use of "BUILDARGS" and "BUILD" to hook
into object construction.
Moose::Cookbook::Basics::DateTime_ExtendingNonMooseParent
In this recipe, we make a Moose-based subclass of DateTime, a
module which does not use Moose itself.
Moose::Cookbook::Basics::Document_AugmentAndInner
Demonstrates the use of "augment" method modifiers, a way of
turning the usual method overriding style "inside-out".
Moose Roles
These recipes will show you how to use Moose roles.
Moose::Cookbook::Roles::Comparable_CodeReuse
Demonstrates roles, which are also sometimes known as traits or
mix-ins. Roles provide a method of code re-use which is orthogonal
to subclassing.
Moose::Cookbook::Roles::Restartable_AdvancedComposition
Sometimes you just want to include part of a role in your class.
Sometimes you want the whole role but one of its methods conflicts
with one in your class. With method exclusion and aliasing, you can
work around these problems.
Moose::Cookbook::Roles::ApplicationToInstance
In this recipe, we apply a role to an existing object instance.
Meta Moose
These recipes show you how to write your own meta classes, which lets
you extend the object system provided by Moose.
Moose::Cookbook::Meta::WhyMeta
If you're wondering what all this "meta" stuff is, and why you
should care about it, read this "recipe".
Moose::Cookbook::Meta::Labeled_AttributeTrait
Extending Moose's attribute metaclass is a great way to add
functionality. However, attributes can only have one metaclass.
Applying roles to the attribute metaclass lets you provide
composable attribute functionality.
Moose::Cookbook::Meta::Table_MetaclassTrait
This recipe takes the class metaclass we saw in the previous recipe
and reimplements it as a metaclass trait.
Moose::Cookbook::Meta::PrivateOrPublic_MethodMetaclass
This recipe shows a custom method metaclass that implements making
a method private.
Moose::Cookbook::Meta::GlobRef_InstanceMetaclass
This recipe shows an example of how you create your own meta-
instance class. The meta-instance determines the internal structure
of object instances and provide access to attribute slots.
In this particular instance, we use a blessed glob reference as the
instance instead of a blessed hash reference.
Hooking into immutabilization (TODO)
Moose has a feature known as "immutabilization". By calling
"__PACKAGE__->meta()->make_immutable()" after defining your class
(attributes, roles, etc), you tell Moose to optimize things like
object creation, attribute access, and so on.
If you are creating your own metaclasses, you may need to hook into
the immutabilization system. This cuts across a number of spots,
including the metaclass class, meta method classes, and possibly
the meta-instance class as well.
This recipe shows you how to write extensions which immutabilize
properly.
Extending Moose
These recipes cover some more ways to extend Moose, and will be useful
if you plan to write your own "MooseX" module.
Moose::Cookbook::Extending::ExtensionOverview
There are quite a few ways to extend Moose. This recipe provides an
overview of each method, and provides recommendations for when each
is appropriate.
Moose::Cookbook::Extending::Debugging_BaseClassRole
Many base object class extensions can be implemented as roles. This
example shows how to provide a base object class debugging role
that is applied to any class that uses a notional
"MooseX::Debugging" module.
Moose::Cookbook::Extending::Mooseish_MooseSugar
This recipe shows how to provide a replacement for "Moose.pm". You
may want to do this as part of the API for a "MooseX" module,
especially if you want to default to a new metaclass class or base
object class.
SNACKS
Moose::Cookbook::Snack::Keywords
Moose::Cookbook::Snack::Types
Legacy Recipes
These cover topics that are no longer considered best practice. We've
kept them in case in you encounter these usages in the wild.
Moose::Cookbook::Legacy::Labeled_AttributeMetaclass
Moose::Cookbook::Legacy::Table_ClassMetaclass
Moose::Cookbook::Legacy::Debugging_BaseClassReplacement
SEE ALSO
<http://www.gsph.com/index.php?Lang=En&ID=291>
AUTHORS
• Stevan Little <stevan@cpan.org>
• Dave Rolsky <autarch@urth.org>
• Jesse Luehrs <doy@cpan.org>
• Shawn M Moore <sartak@cpan.org>
• יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
• Karen Etheridge <ether@cpan.org>
• Florian Ragwitz <rafl@debian.org>
• Hans Dieter Pearcey <hdp@cpan.org>
• Chris Prather <chris@prather.org>
• Matt S Trout <mstrout@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.
perl v5.34.0 2022-02-06 Moose::Cookbook(3pm)
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