What does 'lexical $_ is now experimental' mean? Is something like this still doable?

while(<SOMEHANDLE>)
{
    chomp;
    my $string = "hello" .$_;
    print $string;
    
}
[download]

Still work?

Yes, still works. That's not explicitly creating a lexical $_.

Here's an excerpt from Perl 5.18.0's "perlvar" (I'm not linking here because perldoc.perl.org hasn't loaded up v5.18 yet.):

$_ is by default a global variable. However, as of perl v5.10.0, you can use a lexical version of $_ by declaring it in a file or in a block with "my". Moreover, declaring "our $_" restores the global $_ in the current scope. Though this seemed like a good idea at the time it was introduced, lexical $_ actually causes more problems than it solves. If you call a function that expects to be passed information via $_, it may or may not work, depending on how the function is written, there not being any easy way to solve this. Just avoid lexical $_, unless you are feeling particularly masochistic. For this reason lexical $_ is still experimental and will produce a warning unless warnings have been disabled. As with other experimental features, the behavior of lexical $_ is subject to change without notice, including change into a fatal error.




Dave

It gives an example

https://metacpan.org/module/RJBS/perl-5.18.0/pod/perldelta.pod#Lexical-_-is-now-experimental

lexical means my

See https://metacpan.org/module/RJBS/perl-5.18.0/pod/perldelta.pod#given-now-aliases-the-global-_, Yet more Try::Tiny problelms, Lexical $_ in given/when vs. BLOCK arguments