From the docs:

In case you just want to ward off all error messages from the module in which you “use Carp::Clan”, i.e., if you want to make all error messages or warnings to appear to originate from where your module was called (this is what you usually used to “use Carp;” for ;-)), instead of in your module itself (which is what you can do with a “die” or “warn” anyway), you do not need to provide a pattern, the module will automatically provide the correct one for you.

Before I discovered this module, I would play silly games with local $Carp::CarpLevel = $Carp::CarpLevel + 1 sprinkled all over the place. Not only was that annoying, it also hatefully causes Carp to emit verbose messages. Now I just use Carp::Clan and things work as I meant them to.

Of course, that’s not the module’s only use – but that alone makes the module worthwhile to use everywhere, even if you don’t have a “clan” of modules.

My only question is: why is this not part of the core? Why indeed doesn’t Carp itself work that way?

In reply to Carp::Clan by Aristotle

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