Class::Accessor::Class.3pm

Langue: en

Version: 2006-11-13 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

Class::Accessor::Class - simple class variable accessors

VERSION

version 0.501 
  $Id: /my/cs/projects/claccl/trunk/lib/Class/Accessor/Class.pm 27922 2006-11-13T16:05:47.533928Z rjbs  $

SYNOPSIS

Set up a module with class accessors: 
  package Text::Fortune;
 
  use base qw(Class::Accessor::Class Exporter);
  Robot->mk_class_accessors(qw(language offensive collection));
 
  sub fortune { 
    if (__PACKAGE__->offensive) {
          ..

Then, when using the module:

  use Text::Fortune;
 
  Text::Fortune->offensive(1);
 
  print fortune; # prints an offensive fortune
 
  Text::Fortune->language('EO');
 
  print fortune; # prints an offensive fortune in Esperanto

DESCRIPTION

Class::Accessor::Class provides a simple way to create accessor and mutator methods for class variables, just as Class::Accessor provides for objects. It can use either an enclosed lexical variable, or a package variable.

This module was once implemented in terms of Class::Accessor, but changes to that module broke this relationship. Class::Accessor::Class is still a subclass of Class::Accessor, strictly for historical reasons. As a side benefit, a class that isa Class::Accessor::Class is also a Class::Accessor and can use its methods.

METHODS

mk_class_accessors

  package Foo;
  use base qw(Class::Accessor::Class);
  Foo->mk_class_accessors(qw(foo bar baz));
 
  Foo->foo(10);
  my $obj = new Foo;
  print $obj->foo;   # 10

This method adds accessors for the named class variables. The accessor will get or set a lexical variable to which the accessor is the only access.

mk_package_accessors

  package Foo;
  use base qw(Class::Accessor::Class);
  Foo->mk_package_accessors(qw(foo bar baz));
 
  Foo->foo(10);
  my $obj = new Foo;
  print $obj->foo;   # 10
  print $Foo::foo;    # 10

This method adds accessors for the named class variables. The accessor will get or set the named variable in the package's symbol table.

DETAILS

make_class_accessor

  $accessor = Class->make_class_accessor($field);

This method generates a subroutine reference which acts as an accessor for the named field.

make_package_accessor

  $accessor = Class->make_package_accessor($field);

This method generates a subroutine reference which acts as an accessor for the named field, which is stored in the scalar named "field" in "Class"'s symbol table.

This can be useful for dealing with legacy code, but using package variables is almost never a good idea for new code. Use this with care.

AUTHOR

Ricardo SIGNES, "<rjbs@cpan.org>"

BUGS

Please report any bugs or feature requests to "bug-class-accessor-class@rt.cpan.org", or through the web interface at <http://rt.cpan.org>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. Copyright 2004-2006 Ricardo Signes, All Rights Reserved.

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