It's the Perl5 Camelcade plugin for intelliJ IDEA. I've been using it religiously (along with the Vim plugin, of course) for numerous years now.

I'm doubtful that it uses Perl::Critic, as it works just fine if that distribution isn't installed. I'm quite sure it uses its own parser, but I am not 100% sure either way. It works the exact same way with Python, JS/jQuery etc.

The only Perl distributions that I install in support of this software is Devel::Camelcadedb, which simply supplies Perl debug support within the IDE.

The docs of Camelcade talk about sub resolution, but I'm not sure how it's implemented.

Inspecting the Op-Tree could be a way, cause B::Deparse shows that it's a method call and B::Xref lists all subs.

Camelcade also warns that sub resolution is not 100% reliable.

Unless an implementation offers it via "Language Server Protocol" I doubt one can call it a common IDE feature.

And I'd really like to know how the existence of a sub AUTOLOAD is handled...

Cheers Rolf
_{(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery}