[Chicago-talk] DEBUG function

[Jay Strauss]

I'm looking at some code "POE::Filter::Line" @
http://search.cpan.org/src/RCAPUTO/POE-0.2802/lib/POE/Filter/Line.pm

and at the top he has a:

sub DEBUG () { 0 }

then later he has a:

DEBUG and do {
    ....
};

obviously this is debugging stuff.  My question is how would you ever get
DEBUG to return "true", in order to enter the debugging code?  I know you
can always change the source to make:

sub DEBUG () { 1 }

But is there some way you are supposed to do this at runtime?

Jay