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Toby Inkster

NAME

MooX::ClassAttribute - declare class attributes Moose-style... but without Moose

SYNOPSIS

   {
      package Foo;
      use Moo;
      use MooX::ClassAttribute;
      class_has ua => (
         is      => 'rw',
         default => sub { LWP::UserAgent->new },
      );
   }
   
   my $r = Foo->ua->get("http://www.example.com/");

DESCRIPTION

This module adds support for class attributes to Moo. Class attributes are attributes whose values are not associated with any particular instance of the class.

For example, the Person class might have a class attribute "binomial_name"; its value "Homo sapiens" is not associated with any particular individual, but the class as a whole.

   say Person->binomial_name;   # "Homo sapiens"
   my $bob = Person->new;
   say $bob->binomial_name;     # "Homo sapiens"
   
   my $alice = Person->new;
   $alice->binomial_name("H. sapiens");
   say $bob->binomial_name;     # "H. sapiens"

Class attributes may be defined in roles, however they cannot be called as methods using the role package name. Instead the role must be composed with a class; the class attributes will be installed into that class.

This module mostly tries to behave like MooseX::ClassAttribute.

CAVEATS

  • Overriding class attributes and their accessors in subclasses is not yet supported. The implementation, and expected behaviour hasn't been figured out yet.

  • When Moo classes are inflated to Moose classes, this module will attempt to load MooseX::ClassAttribute, and use that to provide class attribute meta objects.

    If MooseX::ClassAttribute cannot be loaded, a loud warning will be printed, and the inflation will fall back to representing class attribute accessors as plain old class methods.

  • This module uses some pretty experimental techniques, especially to handle inflation. There are probably all sorts of bugs lurking. Don't let that scare you though; I'm usually pretty quick to fix bugs once they're reported. ;-)

BUGS

Please report any bugs to http://rt.cpan.org/Dist/Display.html?Queue=MooX-ClassAttribute.

See also: "CAVEATS" in Method::Generate::ClassAccessor.

SEE ALSO

Moo, MooseX::ClassAttribute.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

This software is copyright (c) 2013 by Toby Inkster.

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

DISCLAIMER OF WARRANTIES

THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.




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