plucky (3) Moose::Cookbook::Basics::Immutable.3pm.gz

Provided by: libmoose-perl_2.2207-1build3_amd64 bug

NAME
       Moose::Cookbook::Basics::Immutable - Making Moose fast by making your class immutable


VERSION
       version 2.2207


SYNOPSIS
         package Point;
         use Moose;

         has 'x' => ( isa => 'Int', is => 'ro' );
         has 'y' => ( isa => 'Int', is => 'rw' );

         __PACKAGE__->meta->make_immutable;


DESCRIPTION
       The Moose metaclass API provides a make_immutable() method. Calling this method does two things to your
       class. First, it makes it faster. In particular, object construction and destruction are effectively
       "inlined" in your class, and no longer invoke the meta API.

       Second, you can no longer make changes via the metaclass API, such as adding attributes. In practice,
       this won't be a problem, as you rarely need to do this after first loading the class.


CONCLUSION
       We strongly recommend you make your classes immutable. It makes your code much faster, with a small
       compile-time cost. This will be especially noticeable when creating many objects.


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>


       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.