1Moose::Cookbook::BasicsU:s:eIrmmCuotnatbrlieb(u3t)ed PerMlooDsoec:u:mCeonotkabtoiookn::Basics::Immutable(3)
2
3
4

NAME

6       Moose::Cookbook::Basics::Immutable - Making Moose fast by making your
7       class immutable
8

VERSION

10       version 2.2014
11

SYNOPSIS

13         package Point;
14         use Moose;
15
16         has 'x' => ( isa => 'Int', is => 'ro' );
17         has 'y' => ( isa => 'Int', is => 'rw' );
18
19         __PACKAGE__->meta->make_immutable;
20

DESCRIPTION

22       The Moose metaclass API provides a "make_immutable()" method. Calling
23       this method does two things to your class. First, it makes it faster.
24       In particular, object construction and destruction are effectively
25       "inlined" in your class, and no longer invoke the meta API.
26
27       Second, you can no longer make changes via the metaclass API, such as
28       adding attributes. In practice, this won't be a problem, as you rarely
29       need to do this after first loading the class.
30

CONCLUSION

32       We strongly recommend you make your classes immutable. It makes your
33       code much faster, with a small compile-time cost. This will be
34       especially noticeable when creating many objects.
35

AUTHORS

37       •   Stevan Little <stevan@cpan.org>
38
39       •   Dave Rolsky <autarch@urth.org>
40
41       •   Jesse Luehrs <doy@cpan.org>
42
43       •   Shawn M Moore <sartak@cpan.org>
44
45       •   יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
46
47       •   Karen Etheridge <ether@cpan.org>
48
49       •   Florian Ragwitz <rafl@debian.org>
50
51       •   Hans Dieter Pearcey <hdp@cpan.org>
52
53       •   Chris Prather <chris@prather.org>
54
55       •   Matt S Trout <mstrout@cpan.org>
56

58       This software is copyright (c) 2006 by Infinity Interactive, Inc.
59
60       This is free software; you can redistribute it and/or modify it under
61       the same terms as the Perl 5 programming language system itself.
62
63
64
65perl v5.32.1                      2021-01-M2o7ose::Cookbook::Basics::Immutable(3)
Impressum