I'm writing a module and I'd like scripts using it to be able to turn on debugging. At first, I wanted use a very simple interface like Storable does,

$Storable::forgive_me = 1;
[download]

But then it occurred to me that perhaps I would be able to be a little more flexible with a sub. So I came up with something like this:

Package DebugMe;

use vars qw( $dl ); # debug level

sub debug {
  use Carp;
  use Data::Dumper;
  $dl |= shift;
}

# so the usage would be this:

DebugMe::debug( 1 ); # change debugging level to 1
DebugMe::debug( 2 ); # change degbugging level to 2
[download]

However, I dont want the user to have any warnings if they arent interested in debugging because they dont have Data::Dumper or (isnt it part of the core) Carp. I looked through perldoc perlmod and also through perldoc -f use and perldoc -f require. I havent seen whether it gets use'd every time, or whether it only gets called when its needed.

Could somebody clarify this for me?

Thanks,
brother dep.

--
Laziness, Impatience, Hubris, and Generosity.