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Exporter::Lite.3pm
Langue: en
Version: 2006-11-11 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
Exporter::Lite - Lightweight exporting of variablesSYNOPSIS
package Foo; use Exporter::Lite; # Just like Exporter. @EXPORT = qw($This That); @EXPORT_OK = qw(@Left %Right); # Meanwhile, in another piece of code! package Bar; use Foo; # exports $This and &That.
DESCRIPTION
This is an alternative to Exporter intended to provide a lightweight subset of its functionality. It supports "import()", @EXPORT and @EXPORT_OK and not a whole lot else.Unlike Exporter, it is not necessary to inherit from Exporter::Lite (ie. no "@ISA = qw(Exporter::Lite)" mantra). Exporter::Lite simply exports its import() function. This might be called a ``mix-in''.
Setting up a module to export its variables and functions is simple:
package My::Module; use Exporter::Lite; @EXPORT = qw($Foo bar);
now when you "use My::Module", $Foo and "bar()" will show up.
In order to make exporting optional, use @EXPORT_OK.
package My::Module; use Exporter::Lite; @EXPORT_OK = qw($Foo bar);
when My::Module is used, $Foo and "bar()" will not show up. You have to ask for them. "use My::Module qw($Foo bar)".
Methods
Export::Lite has one public method, import(), which is called automaticly when your modules is use()'d.In normal usage you don't have to worry about this at all.
- import
-
Some::Module->import; Some::Module->import(@symbols);
Works just like "Exporter::import()" excepting it only honors @Some::Module::EXPORT and @Some::Module::EXPORT_OK.
The given @symbols are exported to the current package provided they are in @Some::Module::EXPORT or @Some::Module::EXPORT_OK. Otherwise an exception is thrown (ie. the program dies).
If @symbols is not given, everything in @Some::Module::EXPORT is exported.
DIAGNOSTICS
- '%s is not exported by the %s module'
- Attempted to import a symbol which is not in @EXPORT or @EXPORT_OK.
- 'Can\'t export symbol: %s'
- Attempted to import a symbol of an unknown type (ie. the leading $@% salad wasn't recognized).
BUGS and CAVEATS
Its not yet clear if this is actually any lighter or faster than Exporter. I know its at least on par.OTOH, the docs are much clearer and not having to say "@ISA = qw(Exporter)" is kinda nice.
AUTHORS
Michael G Schwern <schwern@pobox.com>LICENSE
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.See http://www.perl.com/perl/misc/Artistic.html
SEE ALSO
Exporter, Exporter::Simple, UNIVERSAL::exportsContenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre