Dear Monks:

While I was trying to understand how Inline::Files works, I found that every function in this file starts with the line

Since 'use strict' is in effect, DEBUG must be a function (or use const), and it must be defined somewhere, or imported from somewhere, but I cannot find it. I tried to define a ::DEBUG or Inline::Files::DEBUG function in my program's BEGIN block but it didn't get called. (Nor did I find the TRACE function...)

Is this some kind of Perlish magic? Or was I unable to find the manpage? (It's neither on perldebug nor perldebtut nor perldebguts.)