Global? There ain't any global sir.

Global to all calls to hanoi. External? Non-local? Yet highly coupled.

And _hanoi(@_); would work just as well

That's what I said.

while your tricks with local are unavoidable.

How is localising a var "a trick"? Dealing with package vars is a necessity in Perl, and the first thing you need to know is how to localise them.

It is avoidable, but it's messy and requires a trick to avoid a memory leak. 

my $_hanoi;         # \ Messy line break
$_hanoi = sub {     # /
   ...
   $_hanoi->(...);  # Relatively messy syntax
   ...
};
$_hanoi->(...);
undef $_hanoi;      # Messy hack to avoid mem leak.

[download]

Using local actually cleans up a whole of mess.

Besides the problem is not the local itself, but the typeglob handling.

"The typeglob handling" makes "setting a typeglob" sound falsely ominous. It's a manufactured problem.

What debugging complexities are you speaking of?

The removal of a stack frame creates lying stack traces, not just to users but to debugging tools.

In reply to Re^5: passing subroutine references by ikegami
in thread passing subroutine references by joe76

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