I'm not sure why you are trying to load subs from the outer package as methods but you could basically import to the target DSL package without exporting to the calling package.

You basically can export the whole DSL logic and anything else to "Page" and reuse the package multiple times.

package Pack;

use strict;
use warnings;


sub bla {
   warn ((caller(0))[3]);
}



use Import2Package 'DTD' => 'Page';


package Page {
   Page->bla();
}
[download]

exec "perl import2package.pl" unless caller();

use strict;
use warnings;

package Import2Package;


sub import {
   my ($self, $dtd, $pack) =@_;
   my $super = (caller())[0];
   no strict 'refs';
   push @{"${pack}::ISA"}, $super;
}

1;
[download]

Pack::bla at import2package.pl line 7.
[download]

update

of course TIMTOWTDI.

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