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use strict;
use warnings;
package Class::Accessor::Class;
{
$Class::Accessor::Class::VERSION = '0.503';
}
use Class::Accessor 0.16 ();
use parent 'Class::Accessor';
# ABSTRACT: simple class variable accessors
sub mk_class_accessors {
my ($self, @fields) = @_;
## no critic (ProhibitNoStrict)
no strict 'refs';
for my $field (@fields) {
*{"${self}::$field"} = $self->make_class_accessor($field);
}
}
sub mk_package_accessors {
my ($self, @fields) = @_;
## no critic (ProhibitNoStrict)
no strict 'refs';
for my $field (@fields) {
*{"${self}::$field"} = $self->make_package_accessor($field);
}
}
{
my %accessor;
sub make_class_accessor {
my ($class, $field) = @_;
return $accessor{$class}{$field}
if $accessor{$class}{$field};
my $field_value;
$accessor{$class}{$field} = sub {
my $class = shift;
return @_
? ($field_value = $_[0])
: $field_value;
}
}
}
sub make_package_accessor {
my ($self, $field) = @_;
my $class = ref $self || $self;
my $varname = "$class\:\:$field";
return sub {
my $class = shift;
## no critic (ProhibitNoStrict)
no strict 'refs';
return @_
? (${$varname} = $_[0])
: ${$varname}
}
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Class::Accessor::Class - simple class variable accessors
=head1 VERSION
version 0.503
=head1 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
=head1 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.
=head1 METHODS
=head2 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.
=head2 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.
=head1 DETAILS
=head2 make_class_accessor
$accessor = Class->make_class_accessor($field);
This method generates a subroutine reference which acts as an accessor for the
named field.
=head2 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 C<field> in C<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.
=head1 AUTHOR
Ricardo SIGNES <rjbs@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2004 by Ricardo SIGNES.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|