You are mixing compile-time and run-time behavior. *

The double nature of my is probably causing false expectations, but this works:

C:\Windows\system32>perl
use warnings;
use strict;

my $lib;                       # compile time file scope (declaration)
use lib $lib="XXX";            # compile time  use scope (assignment) 
print $lib;                    # run time     file scope (output)
__END__
XXX
C:\Windows\system32>

[download]

EDIT

but if you want to totally confuse your colleague show him this working code ;-)

use warnings;
use strict;

my $lib;
print $lib;                    # prints XXX


use lib $lib="XXX";
__END__
XXX

[download]

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

*) additional to the effect already described in use has it's own scope?

In reply to Re: Scope in use by LanX
in thread Scope in use by choroba

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