Thanks for the pointer, but I'm still not able to find the filename of the package. I have played a little with caller(), but it seems to provide details of the calling program, rather than the included module?

Here is more what I am looking to do:

# my.pl
use My::Factory;

my $obj = My::Factory->new('Apple');
...
# My/Factory.pm
package My::Factory;
1;
sub new{
  my $factoryclass = shift;
  my $class = "My::" . shift; # My::Apple
  my $filename = $class;
  $filename =~ s/::/\//g;  
  $filename .= '.pm'; # My/Apple.pm
  if ( -e $filename ) {
    require $filename;
  } else {
    die "not found: $filename";
  }     
}
[download]

Which all looks good and dandy, except that My::Factory is picked up from @INC at runtime. I thought that a package might know its own filename?

Note that I don't want to pick up My::Apple from somewhere else in @INC - I want it to be in the same place as My/Factory.pm

Apologies if that is not clear...

Off to see if I can figure out how Carp does it...

Regards

Jeff