this is the ugly grandfather of pluggable keys, right?

Yes probably if I defined a key "case" I could implement it like this.

Unless mauke already published a switch module using Keyword::Simple ... ;)

See Switch::Plain

Thanks, interesting! :)

Seems to be based on Scope::Upper and does loads of black magic. (And might be useful to implement lisp style macros)

But only on upper contexts. The subs in questions are "lower" contexts

Magicky indeed, another one

Code::Splice - Injects the contents of one subroutine at a specified point elsewhere.

based on B::Generate - Create your own op trees.

Dark than dark magic, and P5P will abandon any hope of progress.

This is really interesting though.

But I think you missed the part where I asked for a "cleaner solution" ;)

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

And manipulating the warn handler looks cleaner now (though I have to check caller(2) too)