use strict;
use warnings;
use Data::Dump qw/pp dd/;


sub create_class {
    my ($class) = @_;

    my $source = <<"__CODE__";

    package $class;

    sub import {
        warn "$class imported";
    }

__CODE__


    eval $source;

    my $name = $class =~ s(::)(\/)gr;

    $INC{"$name.pm"} = 'imported via eval';
}


BEGIN {
    create_class('Jabba::Dabba');
}

pp \%INC;

use Jabba::Dabba;
[download]

fixed module template, less Perl version dependencies, more flexible and untangled templating

use strict;
use warnings;
use Data::Dumper;



sub test_tmpl {
    my ($name) = @_;

    return $name, <<"__CODE__";

package $name;

sub import {
    warn "$name imported";
}

1;

__CODE__

}

sub create_module {
    my ( $module, $source ) = @_;

    eval $source;

    (my $name = $module)
      =~ s(::)(\/)g;

    my @caller = caller();

    $INC{"$name.pm"} = "imported via eval at @caller";
}


BEGIN {
    create_module( test_tmpl('Jabba::Dabba') );
}

use Jabba::Dabba;

warn Dumper \%INC;
[download]

-*- mode: compilation; default-directory: "d:/tmp/pm/" -*-
Compilation started at Mon Dec 28 18:09:17

C:/Perl_524/bin\perl.exe -w d:/tmp/pm/create_class.pl 
Jabba::Dabba imported at (eval 2) line 5.
$VAR1 = {
          'overloading.pm' => 'C:/Perl_524/lib/overloading.pm',
          'Data/Dumper.pm' => 'C:/Perl_524/lib/Data/Dumper.pm',
          'overload.pm' => 'C:/Perl_524/lib/overload.pm',
          'strict.pm' => 'C:/Perl_524/lib/strict.pm',
          'warnings/register.pm' => 'C:/Perl_524/lib/warnings/register
+.pm',
          'bytes.pm' => 'C:/Perl_524/lib/bytes.pm',
          'Jabba/Dabba.pm' => 'imported via eval at main d:/tmp/pm/cre
+ate_class.pl 39',
          'Carp.pm' => 'C:/Perl_524/lib/Carp.pm',
          'C:/Perl_524/site/lib/sitecustomize.pl' => 'C:/Perl_524/site
+/lib/sitecustomize.pl',
          'XSLoader.pm' => 'C:/Perl_524/lib/XSLoader.pm',
          'constant.pm' => 'C:/Perl_524/lib/constant.pm',
          'warnings.pm' => 'C:/Perl_524/lib/warnings.pm',
          'Exporter.pm' => 'C:/Perl_524/lib/Exporter.pm'
        };

Compilation finished at Mon Dec 28 18:09:17
[download]

Cheers Rolf
_{(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery}

I wrote my last reply at 3.13am (my time). I did see your response about 10 minutes later but my eyes were getting pretty blurry by then: I decided some sleep was in order before looking into that further. :-)

Twelve hours later, and much refreshed, I see you've posted a lot more code. Thanks for that — I'll look into it and see how that fits with my existing code.