Another experimental module playing around with optional loading of other modules

optionally.pm

package optionally;

# don't use this
#
# this was an experiment in loading modules optionally, so you can write:
#
# use optionally;
# optionally use Module::Foo 1.23 qw/ function1 function2 /;
#

use strict;
use warnings;

use Keyword::Simple ();
use Carp qw/ croak /;
use Module::Runtime qw/ require_module /;
use Class::Unload ();

sub import
{
    my $importing_package = caller;

    Keyword::Simple::define('optionally' => sub {
        my $line = shift;

        my ($matched, $action, $module, $rest) = ( $$line =~ m!\A(\s*(\S+)\s+(\S+)\s*(.*?);)! )
            or croak "syntax error near 'optionally'";
        substr($$line, 0, length($matched)) = "";

        eval "package $importing_package; $matched";
    });
}

1;