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Moose::Cookbook::Snack::KeywordUsermContributed Perl DocumenMoose::Cookbook::Snack::Keywords(3pm)
NAME
Moose::Cookbook::Snack::Keywords - Restricted "keywords" in Moose
VERSION
version 2.2200
DESCRIPTION
Moose exports a number of sugar functions in order to emulate Perl built-in keywords.
These can cause clashes with other user-defined functions. This document provides a list
of those keywords for easy reference.
The 'meta' keyword
"useMoose" adds a method called "meta" to your class. If this conflicts with a method or
function you are using, you can rename it, or prevent it from being installed entirely. To
do this, pass the "-meta_name" option when you "useMoose". For instance:
# install it under a different name
use Moose -meta_name => 'moose_meta';
# don't install it at all
use Moose -meta_name => undef;
Moose Keywords
If you are using Moose or Moose::Role it is best to avoid these keywords:
extends
with
has
before
after
around
super
override
inner
augment
confess
blessed
meta
Moose::Util::TypeConstraints Keywords
If you are using Moose::Util::TypeConstraints it is best to avoid these keywords:
type
subtype
class_type
role_type
maybe_type
duck_type
as
where
message
inline_as
coerce
from
via
enum
find_type_constraint
register_type_constraint
Avoiding collisions
Turning off Moose
To remove the sugar functions Moose exports, just add "noMoose" at the bottom of your
code:
package Thing;
use Moose;
# code here
no Moose;
This will unexport the sugar functions that Moose originally exported. The same will also
work for Moose::Role and Moose::Util::TypeConstraints.
Sub::Exporter features
Moose, Moose::Role and Moose::Util::TypeConstraints all use Sub::Exporter to handle all
their exporting needs. This means that all the features that Sub::Exporter provides are
also available to them.
For instance, with Sub::Exporter you can rename keywords, like so:
package LOL::Cat;
use Moose 'has' => { -as => 'i_can_haz' };
i_can_haz 'cheeseburger' => (
is => 'rw',
trigger => sub { print "NOM NOM" }
);
LOL::Cat->new->cheeseburger('KTHNXBYE');
See the Sub::Exporter docs for more information.
namespace::autoclean and namespace::clean
You can also use namespace::autoclean to clean up your namespace. This will remove all
imported functions from your namespace. Note that if you are importing functions that are
intended to be used as methods (this includes overload, due to internal implementation
details), it will remove these as well.
Another option is to use namespace::clean directly, but you must be careful not to remove
"meta" when doing so:
package Foo;
use Moose;
use namespace::clean -except => 'meta';
# ...
SEE ALSO
Moose
Moose::Role
Moose::Util::TypeConstraints
Sub::Exporter
namespace::autoclean
namespace::clean
AUTHORS
o Stevan Little <stevan AT cpan.org>
o Dave Rolsky <autarch AT urth.org>
o Jesse Luehrs <doy AT cpan.org>
o Shawn M Moore <sartak AT cpan.org>
o ' (Yuval Kogman) <nothingmuch AT woobling.org>
o Karen Etheridge <ether AT cpan.org>
o Florian Ragwitz <rafl AT debian.org>
o Hans Dieter Pearcey <hdp AT cpan.org>
o Chris Prather <chris AT prather.org>
o 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.
perl v5.34.0 2022-02-06 Moose::Cookbook::Snack::Keywords(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
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