$ cat > Communicate.pm
package Communicate;

use 5.010_000;

use strict;
use warnings;

sub build_greeter {
    my ( $class, $name, $arg ) = @_;

    return sub {
        my $person  = shift            // 'World';
        my $comment = $arg->{greeting} // 'Hello';

        say sprintf '%s, %s!', $comment, $person;
    }
}

use Sub::Exporter -setup => {
    exports => [ greet => \'build_greeter' ],
};

1;

$ cat > communicate.pl
#! perl

use 5.010_000;

use strict;
use warnings;

use lib '.';

use Communicate greet => {
    greeting => 'Well-done',
    -as      => 'say_to',
};

say_to('Nelo');

exit 0;

##</code><code>##

$ perl communicate.pl 
Well-done, Nelo!

##</code><code>##

$ perl -I. -e 'use Communicate greet => { greeting => q{Good job}, -as => q{say_to} }; say_to(q{Nelo})'
Good job, Nelo!