acme::damn(3pm) [debian man page]
Damn(3pm) User Contributed Perl Documentation Damn(3pm) NAME
Acme::Damn - 'Unbless' Perl objects. SYNOPSIS
use Acme::Damn; my $ref = ... some reference ... my $obj = bless $ref , 'Some::Class'; ... do something with your object ... $ref = damn $obj; # recover the original reference (unblessed) ... neither $ref nor $obj are Some::Class objects ... DESCRIPTION
Acme::Damn provides a single routine, damn(), which takes a blessed reference (a Perl object), and unblesses it, to return the original reference. EXPORT By default, Acme::Damn exports the method damn() into the current namespace. Aliases for damn() (see below) may be imported upon request. Methods damn object damn() accepts a single blessed reference as its argument, and returns that reference unblessed. If object is not a blessed reference, then damn() will "die" with an error. bless reference bless reference [ , package ] bless reference [ , undef ] Optionally, Acme::Damn will modify the behaviour of "bless" to allow the passing of an explicit "undef" as the target package to invoke damn(): use Acme::Damn qw( bless ); my $obj = ... some blessed reference ...; # the following statements are equivalent my $ref = bless $obj , undef; my $ref = damn $obj; NOTE: The modification of "bless" is lexically scoped to the current package, and is not global. Method Aliases Not everyone likes to damn the same way or in the same language, so Acme::Damn offers the ability to specify any alias on import, provided that alias is a valid Perl subroutine name (i.e. all characters match "w"). use Acme::Damn qw( unbless ); use Acme::Damn qw( foo ); use Acme::Damn qw( unblessthyself ); use Acme::Damn qw( recant ); Version 0.02 supported a defined list of aliases, and this has been replaced in v0.03 by the ability to import any alias for "damn()". WARNING
Just as "bless" doesn't call an object's initialisation code, "damn" doesn't invoke an object's "DESTROY" method. For objects that need to be "DESTROY"ed, either don't "damn" them, or call "DESTROY" before judgement is passed. ACKNOWLEDGEMENTS
Thanks to Claes Jacobsson <claes@surfar.nu> for suggesting the use of aliases, and Bo Lindbergh <blgl@cpan.org> for the suggested modification of "bless". SEE ALSO
bless, perlboot, perltoot, perltooc, perlbot, perlobj. AUTHOR
Ian Brayshaw, <ian@onemore.org> COPYRIGHT AND LICENSE
Copyright 2003-2012 Ian Brayshaw This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-02-14 Damn(3pm)
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Package::Pkg(3pm) User Contributed Perl Documentation Package::Pkg(3pm) NAME
Package::Pkg - Handy package munging utilities VERSION
version 0.0020 SYNOPSIS
First, import a new keyword: "pkg" use Package::Pkg; Package name formation: pkg->name( 'Xy', 'A' ) # Xy::A pkg->name( $object, qw/ Cfg / ); # (ref $object)::Cfg Subroutine installation: pkg->install( sub { ... } => 'MyPackage::myfunction' ); # myfunction in MyPackage is now useable MyPackage->myfunction( ... ); Subroutine exporting: package MyPackage; use Package::Pkg; sub this { ... } # Setup an exporter (literally sub import { ... }) for # MyPackage, exporting 'this' and 'that' pkg->export( that => sub { ... }, 'this' ); package main; use MyPackage; this( ... ); that( ... ); DESCRIPTION
Package::Pkg is a collection of useful, miscellaneous package-munging utilities. Functionality is accessed via the imported "pkg" keyword, although you can also invoke functions directly from the package ("Package::Pkg") USAGE
pkg->install( ... ) Install a subroutine, similar to Sub::Install This method takes a number of parameters and also has a two- and three-argument form (see below) # Install an anonymous subroutine as Banana::magic pkg->install( code => sub { ... } , as => 'Banana::magic' ) pkg->install( code => sub { ... } , into => 'Banana::magic' ) # Bzzzt! Throws an error! # Install the subroutine Apple::xyzzy as Banana::magic pkg->install( code => 'Apple::xyzzy', as => 'Banana::magic' ) pkg->install( code => 'Apple::xyzzy', into => 'Banana', as => 'magic' ) pkg->install( from => 'Apple', code => 'xyzzy', as => 'Banana::magic' ) pkg->install( from => 'Apple', code => 'xyzzy', into => 'Banana', as => 'magic' ) # Install the subroutine Apple::xyzzy as Banana::xyzzy pkg->install( code => 'Apple::xyzzy', as => 'Banana::xyzzy' ) pkg->install( code => 'Apple::xyzzy', into => 'Banana' ) pkg->install( from => 'Apple', code => 'xyzzy', as => 'Banana::xyzzy' ) pkg->install( from => 'Apple', code => 'xyzzy', into => 'Banana' ) With implicit "from" (via "caller()") package Apple; sub xyzzy { ... } # Install the subroutine Apple::xyzzy as Banana::xyzzy pkg->install( code => 'xyzzy', as => 'Banana::xyzzy' ) # 'from' is implicitly 'Apple' pkg->install( code => &xyzzy, as => 'Banana::xyzzy' ) Acceptable parameters are: code A subroutine reference, A package-with-name identifier, or The name of a subroutine in the calling package from (optional) A package identifier If :code is an identifier, then :from is the package where the subroutine can be found If :code is an identifier and :from is not given, then :from is assumed to be the calling package (via caller()) as The name of the subroutine to install as. Can be a simple name (when paired with :into) or a full package-with-name into (optional) A package identifier If :as is given, then the full name of the installed subroutine is (:into)::(:as) If :as is not given and we can derive a simple name from :code (It is a package-with-name identifier), then :as will be the name identifier part of :code pkg->install( $code => $as ) This is the two-argument form of subroutine installation Install $code subroutine as $as pkg->install( sub { ... } => 'Banana::xyzzy' ) pkg->install( 'Scalar::Util::blessed' => 'Banana::xyzzy' ) pkg->install( 'Scalar::Util::blessed' => 'Banana::' ) pkg->install( sub { ... } => 'Banana::' ) # Bzzzt! Throws an error! $code should be: o A CODE reference sub { ... } o A package-with-name identifier Scalar::Util::blessed o The name of a subroutine in the calling package sub xyzzy { ... } pkg->install( 'xyzzy' => ... ) $as should be: o A package-with-name identifier Acme::Xyzzy::magic o A package identifier (with a trailing ::) Acme::Xyzzy:: pkg->install( $code => $into, $as ) This is the three-argument form of subroutine installation pkg->install( sub { ... } => 'Banana', 'xyzzy' ) pkg->install( sub { ... } => 'Banana::', 'xyzzy' ) pkg->install( 'Scalar::Util::blessed' => 'Banana', 'xyzzy' ) pkg->install( 'Scalar::Util::blessed' => 'Banana::', 'xyzzy' ) $code can be the same as the two argument form $into should be: o A package identifier (trailing :: is optional) Acme::Xyzzy:: Acme::Xyzzy $as should be: o A name (the name of the subroutine) xyzzy magic $package = pkg->name( $part, [ $part, ..., $part ] ) Return a namespace composed by joining each $part with "::" Superfluous/redundant "::" are automatically cleaned up and stripped from the resulting $package If the first part leads with a "::", the the calling package will be prepended to $package pkg->name( 'Xy', 'A::', '::B' ) # Xy::A::B pkg->name( 'Xy', 'A::' ) # Xy::A:: { package Zy; pkg->name( '::', 'A::', '::B' ) # Zy::A::B pkg->name( '::Xy::A::B' ) # Zy::Xy::A::B } In addition, if any part is blessed, "name" will resolve that part to the package that the part makes reference to: my $object = bless {}, 'Xyzzy'; pkg->name( $object, qw/ Cfg / ); # Xyzzy::Cfg SEE ALSO
Sub::Install Sub::Exporter AUTHOR
Robert Krimen <robertkrimen@gmail.com> COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Robert Krimen. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-06-15 Package::Pkg(3pm)