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Sub::Install(3) User Contributed Perl Documentation Sub::Install(3)
NAME
Sub::Install - install subroutines into packages easily
VERSION
version 0.926
SYNOPSIS
use Sub::Install;
Sub::Install::install_sub({
code => sub { ... },
into => $package,
as => $subname
});
DESCRIPTION
This module makes it easy to install subroutines into packages without the unslightly mess
of "no strict" or typeglobs lying about where just anyone can see them.
FUNCTIONS
install_sub
Sub::Install::install_sub({
code => \&subroutine,
into => "Finance::Shady",
as => 'launder',
});
This routine installs a given code reference into a package as a normal subroutine. The
above is equivalent to:
no strict 'refs';
*{"Finance::Shady" . '::' . "launder"} = \&subroutine;
If "into" is not given, the sub is installed into the calling package.
If "code" is not a code reference, it is looked for as an existing sub in the package
named in the "from" parameter. If "from" is not given, it will look in the calling
package.
If "as" is not given, and if "code" is a name, "as" will default to "code". If "as" is
not given, but if "code" is a code ref, Sub::Install will try to find the name of the
given code ref and use that as "as".
That means that this code:
Sub::Install::install_sub({
code => 'twitch',
from => 'Person::InPain',
into => 'Person::Teenager',
as => 'dance',
});
is the same as:
package Person::Teenager;
Sub::Install::install_sub({
code => Person::InPain->can('twitch'),
as => 'dance',
});
reinstall_sub
This routine behaves exactly like "install_sub", but does not emit a warning if warnings
are on and the destination is already defined.
install_installers
This routine is provided to allow Sub::Install compatibility with Sub::Installer. It
installs "install_sub" and "reinstall_sub" methods into the package named by its argument.
Sub::Install::install_installers('Code::Builder'); # just for us, please
Code::Builder->install_sub({ name => $code_ref });
Sub::Install::install_installers('UNIVERSAL'); # feeling lucky, punk?
Anything::At::All->install_sub({ name => $code_ref });
The installed installers are similar, but not identical, to those provided by
Sub::Installer. They accept a single hash as an argument. The key/value pairs are used
as the "as" and "code" parameters to the "install_sub" routine detailed above. The
package name on which the method is called is used as the "into" parameter.
Unlike Sub::Installer's "install_sub" will not eval strings into code, but will look for
named code in the calling package.
EXPORTS
Sub::Install exports "install_sub" and "reinstall_sub" only if they are requested.
exporter
Sub::Install has a never-exported subroutine called "exporter", which is used to implement
its "import" routine. It takes a hashref of named arguments, only one of which is
currently recognize: "exports". This must be an arrayref of subroutines to offer for
export.
This routine is mainly for Sub::Install's own consumption. Instead, consider
Sub::Exporter.
SEE ALSO
Sub::Installer
This module is (obviously) a reaction to Damian Conway's Sub::Installer, which does
the same thing, but does it by getting its greasy fingers all over UNIVERSAL. I was
really happy about the idea of making the installation of coderefs less ugly, but I
couldn't bring myself to replace the ugliness of typeglobs and loosened strictures
with the ugliness of UNIVERSAL methods.
Sub::Exporter
This is a complete Exporter.pm replacement, built atop Sub::Install.
AUTHOR
Ricardo Signes, "<rjbs AT cpan.org>"
Several of the tests are adapted from tests that shipped with Damian Conway's Sub-
Installer distribution.
BUGS
Please report any bugs or feature requests 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
Copyright 2005-2006 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.
perl v5.16.3 2012-02-26 Sub::Install(3)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
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