Here's half a solution, adapted from the Camel(3ed., Ch. 20) to indent for each call.

$ PERL5DB='{package DB;sub DB{} sub sub {print ++$i,"    "x$i," $sub\n";&$sub;$i--}}' perl -d imlate.pl

It doesn't do anything on sub return, but I expect PERL5DB could be modified to do so. It can be set as an environment variable, or written as a Devel::Xxxx module for the 'perl -d:Xxxx' form of running.

The best part is that it works on unmodified code.

After Compline,
Zaxo

In reply to Re: code review: pretty print sub entry/exit by Zaxo
in thread code review: pretty print sub entry/exit by particle

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