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.\" ========================================================================
.\"
.IX Title "Exporter::Lite 3pm"
.TH Exporter::Lite 3pm "2006-11-11" "perl v5.10.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Exporter::Lite \- Lightweight exporting of variables
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  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 $This and &That.
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is an alternative to Exporter intended to provide a lightweight
subset of its functionality.  It supports \f(CW\*(C`import()\*(C'\fR, \f(CW@EXPORT\fR and
\&\f(CW@EXPORT_OK\fR and not a whole lot else.
.PP
Unlike Exporter, it is not necessary to inherit from Exporter::Lite
(ie. no \f(CW\*(C`@ISA = qw(Exporter::Lite)\*(C'\fR mantra).  Exporter::Lite simply
exports its \fIimport()\fR function.  This might be called a \*(L"mix-in\*(R".
.PP
Setting up a module to export its variables and functions is simple:
.PP
.Vb 2
\&    package My::Module;
\&    use Exporter::Lite;
\&
\&    @EXPORT = qw($Foo bar);
.Ve
.PP
now when you \f(CW\*(C`use My::Module\*(C'\fR, \f(CW$Foo\fR and \f(CW\*(C`bar()\*(C'\fR will show up.
.PP
In order to make exporting optional, use \f(CW@EXPORT_OK\fR.
.PP
.Vb 2
\&    package My::Module;
\&    use Exporter::Lite;
\&
\&    @EXPORT_OK = qw($Foo bar);
.Ve
.PP
when My::Module is used, \f(CW$Foo\fR and \f(CW\*(C`bar()\*(C'\fR will \fInot\fR show up.
You have to ask for them.  \f(CW\*(C`use My::Module qw($Foo bar)\*(C'\fR.
.SH "Methods"
.IX Header "Methods"
Export::Lite has one public method, \fIimport()\fR, which is called
automaticly when your modules is \fIuse()\fR'd.
.PP
In normal usage you don't have to worry about this at all.
.IP "\fBimport\fR" 4
.IX Item "import"
.Vb 2
\&  Some::Module\->import;
\&  Some::Module\->import(@symbols);
.Ve
.Sp
Works just like \f(CW\*(C`Exporter::import()\*(C'\fR excepting it only honors
\&\f(CW@Some::Module::EXPORT\fR and \f(CW@Some::Module::EXPORT_OK\fR.
.Sp
The given \f(CW@symbols\fR are exported to the current package provided they
are in \f(CW@Some::Module::EXPORT\fR or \f(CW@Some::Module::EXPORT_OK\fR.  Otherwise
an exception is thrown (ie. the program dies).
.Sp
If \f(CW@symbols\fR is not given, everything in \f(CW@Some::Module::EXPORT\fR is
exported.
.SH "DIAGNOSTICS"
.IX Header "DIAGNOSTICS"
.ie n .IP "'""%s"" is not exported by the %s module'" 4
.el .IP "'``%s'' is not exported by the \f(CW%s\fR module'" 4
.IX Item "'%s is not exported by the %s module'"
Attempted to import a symbol which is not in \f(CW@EXPORT\fR or \f(CW@EXPORT_OK\fR.
.ie n .IP "'Can\e't export symbol: %s'" 4
.el .IP "'Can\e't export symbol: \f(CW%s\fR'" 4
.IX Item "'Can't export symbol: %s'"
Attempted to import a symbol of an unknown type (ie. the leading $@% salad
wasn't recognized).
.SH "BUGS and CAVEATS"
.IX Header "BUGS and CAVEATS"
Its not yet clear if this is actually any lighter or faster than
Exporter.  I know its at least on par.
.PP
\&\s-1OTOH\s0, the docs are much clearer and not having to say \f(CW\*(C`@ISA =
qw(Exporter)\*(C'\fR is kinda nice.
.SH "AUTHORS"
.IX Header "AUTHORS"
Michael G Schwern <schwern@pobox.com>
.SH "LICENSE"
.IX Header "LICENSE"
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.PP
See \fIhttp://www.perl.com/perl/misc/Artistic.html\fR
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Exporter, Exporter::Simple, UNIVERSAL::exports