You might want to consider Aspect Oriented Programming as a technique for adding cross-cutting behavior, like debug output and logging. (AOP can do a lot more than that, but those are two common uses.)

I am not an expert at AOP, but it might be worth a look.

The Aspect module and associated documents could get you started.

In reply to Re: C/C++ type assert() in Perl? by ChrisS
in thread C/C++ type assert() in Perl? by davidj

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