NAME
Sub::Clean - Clean subroutines with an attribute
VERSION
version 0.01
SYNOPSIS
use Sub::Clean;
sub whatever :Cleaned {
return "This cannot be called as a method";
}
DESCRIPTION
This module 'cleans' subroutines you mark with the "Cleaned" attribute,
preventing them being called from places they haven't been already been
bound by the perl compiler.
The main advantage in this is that you can declare subroutines and use
them in your code as functions, but prevent them from being called as a
method. This is particularly useful if your superclass (maybe
unbeknownst to you) has a method of the same name as the function which
would normally be 'shadowed' by your method.
For example, this:
package Banner;
sub text { "example text\n" }
sub bar { "-"x20 . "\n" }
sub message {
my $class = shift;
return $class->bar . $class->text . $class->bar
}
package PubBanner;
use base qw(Banner);
use Sub::Clean;
sub text { bar() . "\n" }
sub bar :Cleaned {
return (("Cheers","Quark's","Moe's")[rand(3)])
}
package main;
print PubBanner->message();
Print out the right thing:
--------------------
Moe's
--------------------
Rather than just printing three horizontal lines.
Lexical Scope
Please note that this module enables the "Cleaned" attribute only in
lexical scope of the "use Sub::Clean" statement. This prevents namespace
pollution.
AUTHOR
Written by Mark Fowler <
[email protected]>
Copryright Mark Fowler 2010. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
BUGS
No bugs have been reported.
Please report any bugs or feature requests through the web interface at
http://rt.cpan.org/Public/Dist/Display.html?Name=Sub-Clean
AVAILABILITY
The latest version of this module is available from the Comprehensive
Perl Archive Network (CPAN). isit
http://www.perl.com/CPAN/ to find a
CPAN site near you, or see
http://search.cpan.org/dist/Sub-Clean/
The development version lives at
http://github.com/2shortplanks/Sub-Clean/. Instead of sending patches,
please fork this project using the standard git and github
infrastructure.
SEE ALSO
namespace::clean allows you to clean your namespace by dividing your
code up into sections that should be cleaned or not cleaned.
namespace::autoclean automatically can clean imported subroutines from
other namespaces.
Lexical::Sub allows you to declare subroutines that only exist in
lexical scope.
Attribute::Lexical was used to create lexical attributes.
