In a perl script, you can do this; 
use strict;

# hacksym('name', ref)
# e.g. hacksym('foo', \@bar) makes @foo an alias for @bar
sub hacksym {
  my $name = shift;
  my $ref = shift || die "need a reference!";
  no warnings 'uninitialized'; 
  no strict 'refs';
  *{$name} = $ref;
}

[download]
The 'no warnings' and 'no strict' have lexical scope; they are in effect only until the enclosing block ends. However, when I tried this:
(beware, this contains syntax that may frighten small children) 
package Bling;
use strict qw(vars subs);
use warnings;

# simply put: use Bling; then, whenever your script accesses $$, 
# it prints 'Bling Bling!!'.

my $ref;
sub import {
    unless (defined $ref) {
        $ref = \${'main::$'};
        undef *{'main::$'};    # tramples @$ and %$. I really don't ca
+re.
        tie ${'main::$'}, 'Bling::Bling';
    }
}

sub unimport {
    if (defined $ref) {
        untie ${'main::$'};
        *{'main::$'} = $ref;
        undef $ref;
    }
}

package Bling::Bling;

sub TIESCALAR { bless [], shift; }

sub FETCH {
    local $\;
    print "Bling Bling!!\n";
    $$ref;
}
1;

[download]
#!/usr/bin/perl -l
# blingtest.pl
use Bling;
$x=$$;
print '$x is ', $x;
{ no Bling;
  $y=$$;
  print '$y is ', $y;
}
print '$$ is ', $$;

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The result is that no 'Bling Bling!!'s are printed, because the 'no Bling' is not lexically scoped. My question is this: Is it possible to achieve 'lexicality' of use/no in my own modules, just like strict.pm and warnings.pm do?
--Stevie-O 
$"=$,,$_=q>|\p4<6 8p<M/_|<('=>
.q>.<4-KI<l|2$<6%s!<qn#F<>;$,
.=pack'N*',"@{[unpack'C*',$_]
}"for split/</;$_=$,,y[A-Z a-z]
         {}cd;print lc

[download]

In reply to Lexical use/no Module? by Stevie-O

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