Sub::Exporter::GlobExporter(3) export shared globs with Sub::Exporter collectors


version 0.005


First, you write something that exports globs:

package Shared::Symbol;
use Sub::Exporter;
use Sub::Exporter::GlobExport qw(glob_exporter);
use Sub::Exporter -setup => {
collectors => { '$Symbol' => glob_exporter(Symbol => \'_shared_globref') },
sub _shared_globref { return \*Common }

Now other code can import $Symbol and get their *Symbol made an alias to *Shared::Symbol::Common.

If you don't know what this means or why you'd want to do it, you may want to stop reading now.

The other class can do something like this:

  use Shared::Symbol '$Symbol';
  print $Symbol; # prints the scalar entry of *Shared::Symbol::Common


  use Shared::Symbol '$Symbol' => { -as => 'SharedSymbol' };
  print $SharedSymbol; # prints the scalar entry of *Shared::Symbol::Common


  my $glob;
  use Shared::Symbol '$Symbol' => { -as => \$glob };
  print $$glob; # prints the scalar entry of *Shared::Symbol::Common


Sub::Exporter::GlobExporter provides only one routine, "glob_exporter", which may be called either by its full name or may be imported on request.

  my $exporter = glob_exporter( $default_name, $globref_locator );

The routine returns a collection validator that will export a glob into the importing package. It will export it under the name $default_name, unless an alternate name is given (as shown above). The glob that is installed is specified by the $globref_locator, which can be either the globref itself, or a reference to a string which will be called on the exporter

For an example, see the ``SYNOPSIS'', in which a method is defined to produce the globref to share. This allows the glob-exporting package to be subclassed, so the subclass may choose to either re-use the same glob when exporting or to export a new one.

If there are entries in the arguments to the globref-exporting collector other than those beginning with a dash, a hashref of them will be passed to the globref locator. In other words, if we were to write this:

  use Shared::Symbol '$Symbol' => { arg => 1, -as => 2 };

It would result in a call like the following:

  my $globref = Shared::Symbol->_shared_globref({ arg => 1 });


Ricardo Signes <[email protected]>


David Steinbrunner <[email protected]>


This software is copyright (c) 2010 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.