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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.

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