$f->new

##</code><code>##

#! perl
use strict;
use warnings;
package Widget;

sub new
{
    my ($class, $name) = @_;
    my  %self = (name => $name);
    bless \%self, $class;
}

sub say_hello
{
    my ($self) = @_;
    print "$self->{name} says \"Hello!\"\n";
}

1;

##</code><code>##

#! perl
use strict;
use warnings;
use autodie;

open(my $fh, '<', 'Widget.pm');
my $f = do { local $/; <$fh> };
close $fh;

eval $f;
warn $@ if $@;

my $widget = Widget->new('Gromit');
$widget->say_hello();

##</code><code>##

Gromit says "Hello!"