Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister

Re: How to safely use $_ in a library function?

by ikegami (Pope)
on Sep 18, 2013 at 19:08 UTC ( #1054725=note: print w/ replies, xml ) Need Help??

in reply to How to safely use $_ in a library function?

The difference between

sub { ...; goto &foo; }


sub { ...; &foo; }

is that the stack is unwound before the call in the former and after the call in the latter. In other words, you are asking how to protect a variable in a lexical scope you explicitly exit before you need it.

You can't have it both ways. Either you create a scope where $_ is protected or you destroy it, but you can't do both.

Comment on Re: How to safely use $_ in a library function?
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1054725]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (9)
As of 2015-12-02 07:34 GMT
Find Nodes?
    Voting Booth?

    My keyboard shows this many letters:

    Results (35 votes), past polls